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pdfium / pdfium / refs/heads/chromium/5794 / . / core / fxge / dib / cfx_scanlinecompositor.cpp
blob: e9086b753be43f3004454162a776cc56c74e3f51 [file] [log] [blame] [edit]
// Copyright 2017 The PDFium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
#include "core/fxge/dib/cfx_scanlinecompositor.h"
#include <string.h>
#include <algorithm>
#include "core/fxge/dib/fx_dib.h"
#include "third_party/base/check.h"
#include "third_party/base/check_op.h"
#define FXDIB_ALPHA_UNION(dest, src) ((dest) + (src) - (dest) * (src) / 255)
#define FXARGB_RGBORDERCOPY(dest, src) \
*((dest) + 3) = *((src) + 3), *(dest) = *((src) + 2), \
*((dest) + 1) = *((src) + 1), *((dest) + 2) = *((src))
namespace {
const uint8_t color_sqrt[256] = {
0x00, 0x03, 0x07, 0x0B, 0x0F, 0x12, 0x16, 0x19, 0x1D, 0x20, 0x23, 0x26,
0x29, 0x2C, 0x2F, 0x32, 0x35, 0x37, 0x3A, 0x3C, 0x3F, 0x41, 0x43, 0x46,
0x48, 0x4A, 0x4C, 0x4E, 0x50, 0x52, 0x54, 0x56, 0x57, 0x59, 0x5B, 0x5C,
0x5E, 0x60, 0x61, 0x63, 0x64, 0x65, 0x67, 0x68, 0x69, 0x6B, 0x6C, 0x6D,
0x6E, 0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78, 0x79, 0x7A,
0x7B, 0x7C, 0x7D, 0x7E, 0x80, 0x81, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87,
0x87, 0x88, 0x89, 0x8A, 0x8B, 0x8C, 0x8D, 0x8E, 0x8F, 0x90, 0x91, 0x91,
0x92, 0x93, 0x94, 0x95, 0x96, 0x97, 0x97, 0x98, 0x99, 0x9A, 0x9B, 0x9C,
0x9C, 0x9D, 0x9E, 0x9F, 0xA0, 0xA0, 0xA1, 0xA2, 0xA3, 0xA4, 0xA4, 0xA5,
0xA6, 0xA7, 0xA7, 0xA8, 0xA9, 0xAA, 0xAA, 0xAB, 0xAC, 0xAD, 0xAD, 0xAE,
0xAF, 0xB0, 0xB0, 0xB1, 0xB2, 0xB3, 0xB3, 0xB4, 0xB5, 0xB5, 0xB6, 0xB7,
0xB7, 0xB8, 0xB9, 0xBA, 0xBA, 0xBB, 0xBC, 0xBC, 0xBD, 0xBE, 0xBE, 0xBF,
0xC0, 0xC0, 0xC1, 0xC2, 0xC2, 0xC3, 0xC4, 0xC4, 0xC5, 0xC6, 0xC6, 0xC7,
0xC7, 0xC8, 0xC9, 0xC9, 0xCA, 0xCB, 0xCB, 0xCC, 0xCC, 0xCD, 0xCE, 0xCE,
0xCF, 0xD0, 0xD0, 0xD1, 0xD1, 0xD2, 0xD3, 0xD3, 0xD4, 0xD4, 0xD5, 0xD6,
0xD6, 0xD7, 0xD7, 0xD8, 0xD9, 0xD9, 0xDA, 0xDA, 0xDB, 0xDC, 0xDC, 0xDD,
0xDD, 0xDE, 0xDE, 0xDF, 0xE0, 0xE0, 0xE1, 0xE1, 0xE2, 0xE2, 0xE3, 0xE4,
0xE4, 0xE5, 0xE5, 0xE6, 0xE6, 0xE7, 0xE7, 0xE8, 0xE9, 0xE9, 0xEA, 0xEA,
0xEB, 0xEB, 0xEC, 0xEC, 0xED, 0xED, 0xEE, 0xEE, 0xEF, 0xF0, 0xF0, 0xF1,
0xF1, 0xF2, 0xF2, 0xF3, 0xF3, 0xF4, 0xF4, 0xF5, 0xF5, 0xF6, 0xF6, 0xF7,
0xF7, 0xF8, 0xF8, 0xF9, 0xF9, 0xFA, 0xFA, 0xFB, 0xFB, 0xFC, 0xFC, 0xFD,
0xFD, 0xFE, 0xFE, 0xFF};
int Blend(BlendMode blend_mode, int back_color, int src_color) {
switch (blend_mode) {
case BlendMode::kNormal:
return src_color;
case BlendMode::kMultiply:
return src_color * back_color / 255;
case BlendMode::kScreen:
return src_color + back_color - src_color * back_color / 255;
case BlendMode::kOverlay:
return Blend(BlendMode::kHardLight, src_color, back_color);
case BlendMode::kDarken:
return src_color < back_color ? src_color : back_color;
case BlendMode::kLighten:
return src_color > back_color ? src_color : back_color;
case BlendMode::kColorDodge: {
if (src_color == 255)
return src_color;
return std::min(back_color * 255 / (255 - src_color), 255);
}
case BlendMode::kColorBurn: {
if (src_color == 0)
return src_color;
return 255 - std::min((255 - back_color) * 255 / src_color, 255);
}
case BlendMode::kHardLight:
if (src_color < 128)
return (src_color * back_color * 2) / 255;
return Blend(BlendMode::kScreen, back_color, 2 * src_color - 255);
case BlendMode::kSoftLight: {
if (src_color < 128) {
return back_color - (255 - 2 * src_color) * back_color *
(255 - back_color) / 255 / 255;
}
return back_color + (2 * src_color - 255) *
(color_sqrt[back_color] - back_color) / 255;
}
case BlendMode::kDifference:
return back_color < src_color ? src_color - back_color
: back_color - src_color;
case BlendMode::kExclusion:
return back_color + src_color - 2 * back_color * src_color / 255;
default:
return src_color;
}
}
struct RGB {
int red;
int green;
int blue;
};
int Lum(RGB color) {
return (color.red * 30 + color.green * 59 + color.blue * 11) / 100;
}
RGB ClipColor(RGB color) {
int l = Lum(color);
int n = std::min(color.red, std::min(color.green, color.blue));
int x = std::max(color.red, std::max(color.green, color.blue));
if (n < 0) {
color.red = l + ((color.red - l) * l / (l - n));
color.green = l + ((color.green - l) * l / (l - n));
color.blue = l + ((color.blue - l) * l / (l - n));
}
if (x > 255) {
color.red = l + ((color.red - l) * (255 - l) / (x - l));
color.green = l + ((color.green - l) * (255 - l) / (x - l));
color.blue = l + ((color.blue - l) * (255 - l) / (x - l));
}
return color;
}
RGB SetLum(RGB color, int l) {
int d = l - Lum(color);
color.red += d;
color.green += d;
color.blue += d;
return ClipColor(color);
}
int Sat(RGB color) {
return std::max(color.red, std::max(color.green, color.blue)) -
std::min(color.red, std::min(color.green, color.blue));
}
RGB SetSat(RGB color, int s) {
int min = std::min(color.red, std::min(color.green, color.blue));
int max = std::max(color.red, std::max(color.green, color.blue));
if (min == max)
return {0, 0, 0};
color.red = (color.red - min) * s / (max - min);
color.green = (color.green - min) * s / (max - min);
color.blue = (color.blue - min) * s / (max - min);
return color;
}
void RGB_Blend(BlendMode blend_mode,
const uint8_t* src_scan,
const uint8_t* dest_scan,
int results[3]) {
RGB result = {0, 0, 0};
RGB src;
src.red = src_scan[2];
src.green = src_scan[1];
src.blue = src_scan[0];
RGB back;
back.red = dest_scan[2];
back.green = dest_scan[1];
back.blue = dest_scan[0];
switch (blend_mode) {
case BlendMode::kHue:
result = SetLum(SetSat(src, Sat(back)), Lum(back));
break;
case BlendMode::kSaturation:
result = SetLum(SetSat(back, Sat(src)), Lum(back));
break;
case BlendMode::kColor:
result = SetLum(src, Lum(back));
break;
case BlendMode::kLuminosity:
result = SetLum(back, Lum(src));
break;
default:
break;
}
results[0] = result.blue;
results[1] = result.green;
results[2] = result.red;
}
int GetAlpha(uint8_t src_alpha, const uint8_t* clip_scan, int col) {
return clip_scan ? clip_scan[col] * src_alpha / 255 : src_alpha;
}
int GetAlphaWithSrc(uint8_t src_alpha,
const uint8_t* clip_scan,
const uint8_t* src_scan,
int col) {
int result = src_alpha * src_scan[col];
if (clip_scan) {
result *= clip_scan[col];
result /= 255;
}
return result / 255;
}
void CompositeRow_AlphaToMask(pdfium::span<uint8_t> dest_span,
pdfium::span<const uint8_t> src_span,
int pixel_count,
pdfium::span<const uint8_t> clip_span,
uint8_t stride) {
uint8_t* dest_scan = dest_span.data();
const uint8_t* src_scan = src_span.data();
const uint8_t* clip_scan = clip_span.data();
src_scan += stride - 1;
for (int col = 0; col < pixel_count; ++col) {
int src_alpha = GetAlpha(*src_scan, clip_scan, col);
uint8_t back_alpha = *dest_scan;
if (!back_alpha)
*dest_scan = src_alpha;
else if (src_alpha)
*dest_scan = back_alpha + src_alpha - back_alpha * src_alpha / 255;
++dest_scan;
src_scan += stride;
}
}
void CompositeRow_Rgb2Mask(pdfium::span<uint8_t> dest_span,
int width,
pdfium::span<const uint8_t> clip_span) {
uint8_t* dest_scan = dest_span.data();
const uint8_t* clip_scan = clip_span.data();
if (!clip_scan) {
memset(dest_scan, 0xff, width);
return;
}
for (int i = 0; i < width; ++i) {
*dest_scan = FXDIB_ALPHA_UNION(*dest_scan, *clip_scan);
++dest_scan;
++clip_scan;
}
}
bool IsNonSeparableBlendMode(BlendMode mode) {
switch (mode) {
case BlendMode::kHue:
case BlendMode::kSaturation:
case BlendMode::kColor:
case BlendMode::kLuminosity:
return true;
default:
return false;
}
}
uint8_t GetGray(const uint8_t* src_scan) {
return FXRGB2GRAY(src_scan[2], src_scan[1], *src_scan);
}
uint8_t GetGrayWithBlend(const uint8_t* src_scan,
const uint8_t* dest_scan,
BlendMode blend_type) {
uint8_t gray = GetGray(src_scan);
if (IsNonSeparableBlendMode(blend_type))
gray = blend_type == BlendMode::kLuminosity ? gray : *dest_scan;
else if (blend_type != BlendMode::kNormal)
gray = Blend(blend_type, *dest_scan, gray);
return gray;
}
void CompositeRow_Argb2Gray(pdfium::span<uint8_t> dest_span,
pdfium::span<const uint8_t> src_span,
int pixel_count,
BlendMode blend_type,
pdfium::span<const uint8_t> clip_span) {
uint8_t* dest_scan = dest_span.data();
const uint8_t* src_scan = src_span.data();
const uint8_t* clip_scan = clip_span.data();
constexpr size_t kOffset = 4;
for (int col = 0; col < pixel_count; ++col) {
int src_alpha = GetAlpha(src_scan[3], clip_scan, col);
if (src_alpha) {
uint8_t gray = GetGrayWithBlend(src_scan, dest_scan, blend_type);
*dest_scan = FXDIB_ALPHA_MERGE(*dest_scan, gray, src_alpha);
}
++dest_scan;
src_scan += kOffset;
}
}
void CompositeRow_Rgb2Gray(pdfium::span<uint8_t> dest_span,
pdfium::span<const uint8_t> src_span,
int src_Bpp,
int pixel_count,
BlendMode blend_type,
pdfium::span<const uint8_t> clip_span) {
uint8_t* dest_scan = dest_span.data();
const uint8_t* src_scan = src_span.data();
const uint8_t* clip_scan = clip_span.data();
for (int col = 0; col < pixel_count; ++col) {
uint8_t gray = GetGrayWithBlend(src_scan, dest_scan, blend_type);
if (clip_scan && clip_scan[col] < 255)
*dest_scan = FXDIB_ALPHA_MERGE(*dest_scan, gray, clip_scan[col]);
else
*dest_scan = gray;
++dest_scan;
src_scan += src_Bpp;
}
}
void CompositeRow_Argb2Argb(pdfium::span<uint8_t> dest_span,
pdfium::span<const uint8_t> src_span,
int pixel_count,
BlendMode blend_type,
pdfium::span<const uint8_t> clip_span) {
uint8_t* dest_scan = dest_span.data();
const uint8_t* src_scan = src_span.data();
const uint8_t* clip_scan = clip_span.data();
int blended_colors[3];
constexpr size_t kOffset = 4;
bool bNonseparableBlend = IsNonSeparableBlendMode(blend_type);
for (int col = 0; col < pixel_count; ++col) {
uint8_t back_alpha = dest_scan[3];
uint8_t src_alpha = GetAlpha(src_scan[3], clip_scan, col);
if (back_alpha == 0) {
if (clip_scan) {
FXARGB_SETDIB(dest_scan,
(FXARGB_GETDIB(src_scan) & 0xffffff) | (src_alpha << 24));
} else {
memcpy(dest_scan, src_scan, 4);
}
dest_scan += kOffset;
src_scan += kOffset;
continue;
}
if (src_alpha == 0) {
dest_scan += kOffset;
src_scan += kOffset;
continue;
}
uint8_t dest_alpha = back_alpha + src_alpha - back_alpha * src_alpha / 255;
dest_scan[3] = dest_alpha;
int alpha_ratio = src_alpha * 255 / dest_alpha;
if (bNonseparableBlend)
RGB_Blend(blend_type, src_scan, dest_scan, blended_colors);
for (int color = 0; color < 3; ++color) {
if (blend_type != BlendMode::kNormal) {
int blended = bNonseparableBlend
? blended_colors[color]
: Blend(blend_type, *dest_scan, *src_scan);
blended = FXDIB_ALPHA_MERGE(*src_scan, blended, back_alpha);
*dest_scan = FXDIB_ALPHA_MERGE(*dest_scan, blended, alpha_ratio);
} else {
*dest_scan = FXDIB_ALPHA_MERGE(*dest_scan, *src_scan, alpha_ratio);
}
++dest_scan;
++src_scan;
}
++dest_scan;
++src_scan;
}
}
void CompositeRow_Rgb2Argb_Blend_NoClip(pdfium::span<uint8_t> dest_span,
pdfium::span<const uint8_t> src_span,
int width,
BlendMode blend_type,
int src_Bpp) {
uint8_t* dest_scan = dest_span.data();
const uint8_t* src_scan = src_span.data();
int blended_colors[3];
bool bNonseparableBlend = IsNonSeparableBlendMode(blend_type);
int src_gap = src_Bpp - 3;
for (int col = 0; col < width; ++col) {
uint8_t* dest_alpha = &dest_scan[3];
uint8_t back_alpha = *dest_alpha;
if (back_alpha == 0) {
if (src_Bpp == 4) {
FXARGB_SETDIB(dest_scan, 0xff000000 | FXARGB_GETDIB(src_scan));
} else {
FXARGB_SETDIB(dest_scan,
ArgbEncode(0xff, src_scan[2], src_scan[1], src_scan[0]));
}
dest_scan += 4;
src_scan += src_Bpp;
continue;
}
*dest_alpha = 0xff;
if (bNonseparableBlend)
RGB_Blend(blend_type, src_scan, dest_scan, blended_colors);
for (int color = 0; color < 3; ++color) {
int src_color = *src_scan;
int blended = bNonseparableBlend
? blended_colors[color]
: Blend(blend_type, *dest_scan, src_color);
*dest_scan = FXDIB_ALPHA_MERGE(src_color, blended, back_alpha);
++dest_scan;
++src_scan;
}
++dest_scan;
src_scan += src_gap;
}
}
void CompositeRow_Rgb2Argb_Blend_Clip(pdfium::span<uint8_t> dest_span,
pdfium::span<const uint8_t> src_span,
int width,
BlendMode blend_type,
int src_Bpp,
pdfium::span<const uint8_t> clip_span) {
uint8_t* dest_scan = dest_span.data();
const uint8_t* src_scan = src_span.data();
const uint8_t* clip_scan = clip_span.data();
int blended_colors[3];
bool bNonseparableBlend = IsNonSeparableBlendMode(blend_type);
int src_gap = src_Bpp - 3;
for (int col = 0; col < width; ++col) {
int src_alpha = *clip_scan++;
uint8_t back_alpha = dest_scan[3];
if (back_alpha == 0) {
memcpy(dest_scan, src_scan, 3);
dest_scan += 3;
src_scan += src_Bpp;
dest_scan++;
continue;
}
if (src_alpha == 0) {
dest_scan += 4;
src_scan += src_Bpp;
continue;
}
uint8_t dest_alpha = back_alpha + src_alpha - back_alpha * src_alpha / 255;
dest_scan[3] = dest_alpha;
int alpha_ratio = src_alpha * 255 / dest_alpha;
if (bNonseparableBlend)
RGB_Blend(blend_type, src_scan, dest_scan, blended_colors);
for (int color = 0; color < 3; color++) {
int src_color = *src_scan;
int blended = bNonseparableBlend
? blended_colors[color]
: Blend(blend_type, *dest_scan, src_color);
blended = FXDIB_ALPHA_MERGE(src_color, blended, back_alpha);
*dest_scan = FXDIB_ALPHA_MERGE(*dest_scan, blended, alpha_ratio);
dest_scan++;
src_scan++;
}
src_scan += src_gap;
dest_scan++;
}
}
void CompositeRow_Rgb2Argb_NoBlend_Clip(pdfium::span<uint8_t> dest_span,
pdfium::span<const uint8_t> src_span,
int width,
int src_Bpp,
pdfium::span<const uint8_t> clip_span) {
uint8_t* dest_scan = dest_span.data();
const uint8_t* src_scan = src_span.data();
const uint8_t* clip_scan = clip_span.data();
int src_gap = src_Bpp - 3;
for (int col = 0; col < width; col++) {
int src_alpha = clip_scan[col];
if (src_alpha == 255) {
memcpy(dest_scan, src_scan, 3);
dest_scan += 3;
*dest_scan++ = 255;
src_scan += src_Bpp;
continue;
}
if (src_alpha == 0) {
dest_scan += 4;
src_scan += src_Bpp;
continue;
}
int back_alpha = dest_scan[3];
uint8_t dest_alpha = back_alpha + src_alpha - back_alpha * src_alpha / 255;
dest_scan[3] = dest_alpha;
int alpha_ratio = src_alpha * 255 / dest_alpha;
for (int color = 0; color < 3; color++) {
*dest_scan = FXDIB_ALPHA_MERGE(*dest_scan, *src_scan, alpha_ratio);
dest_scan++;
src_scan++;
}
dest_scan++;
src_scan += src_gap;
}
}
void CompositeRow_Rgb2Argb_NoBlend_NoClip(pdfium::span<uint8_t> dest_span,
pdfium::span<const uint8_t> src_span,
int width,
int src_Bpp) {
uint8_t* dest_scan = dest_span.data();
const uint8_t* src_scan = src_span.data();
for (int col = 0; col < width; col++) {
if (src_Bpp == 4) {
FXARGB_SETDIB(dest_scan, 0xff000000 | FXARGB_GETDIB(src_scan));
} else {
FXARGB_SETDIB(dest_scan,
ArgbEncode(0xff, src_scan[2], src_scan[1], src_scan[0]));
}
dest_scan += 4;
src_scan += src_Bpp;
}
}
void CompositeRow_Argb2Rgb_Blend(pdfium::span<uint8_t> dest_span,
pdfium::span<const uint8_t> src_span,
int width,
BlendMode blend_type,
int dest_Bpp,
pdfium::span<const uint8_t> clip_span) {
uint8_t* dest_scan = dest_span.data();
const uint8_t* src_scan = src_span.data();
const uint8_t* clip_scan = clip_span.data();
int blended_colors[3];
bool bNonseparableBlend = IsNonSeparableBlendMode(blend_type);
int dest_gap = dest_Bpp - 3;
for (int col = 0; col < width; col++) {
uint8_t src_alpha;
if (clip_scan) {
src_alpha = src_scan[3] * (*clip_scan++) / 255;
} else {
src_alpha = src_scan[3];
}
if (src_alpha == 0) {
dest_scan += dest_Bpp;
src_scan += 4;
continue;
}
if (bNonseparableBlend) {
RGB_Blend(blend_type, src_scan, dest_scan, blended_colors);
}
for (int color = 0; color < 3; color++) {
int back_color = *dest_scan;
int blended = bNonseparableBlend
? blended_colors[color]
: Blend(blend_type, back_color, *src_scan);
*dest_scan = FXDIB_ALPHA_MERGE(back_color, blended, src_alpha);
dest_scan++;
src_scan++;
}
dest_scan += dest_gap;
src_scan++;
}
}
void CompositeRow_Argb2Rgb_NoBlend(pdfium::span<uint8_t> dest_span,
pdfium::span<const uint8_t> src_span,
int width,
int dest_Bpp,
pdfium::span<const uint8_t> clip_span) {
uint8_t* dest_scan = dest_span.data();
const uint8_t* src_scan = src_span.data();
const uint8_t* clip_scan = clip_span.data();
int dest_gap = dest_Bpp - 3;
for (int col = 0; col < width; col++) {
uint8_t src_alpha;
if (clip_scan) {
src_alpha = src_scan[3] * (*clip_scan++) / 255;
} else {
src_alpha = src_scan[3];
}
if (src_alpha == 255) {
memcpy(dest_scan, src_scan, 3);
dest_scan += dest_Bpp;
src_scan += 4;
continue;
}
if (src_alpha == 0) {
dest_scan += dest_Bpp;
src_scan += 4;
continue;
}
for (int color = 0; color < 3; color++) {
*dest_scan = FXDIB_ALPHA_MERGE(*dest_scan, *src_scan, src_alpha);
dest_scan++;
src_scan++;
}
dest_scan += dest_gap;
src_scan++;
}
}
void CompositeRow_Rgb2Rgb_Blend_NoClip(pdfium::span<uint8_t> dest_span,
pdfium::span<const uint8_t> src_span,
int width,
BlendMode blend_type,
int dest_Bpp,
int src_Bpp) {
uint8_t* dest_scan = dest_span.data();
const uint8_t* src_scan = src_span.data();
int blended_colors[3];
bool bNonseparableBlend = IsNonSeparableBlendMode(blend_type);
int dest_gap = dest_Bpp - 3;
int src_gap = src_Bpp - 3;
for (int col = 0; col < width; col++) {
if (bNonseparableBlend) {
RGB_Blend(blend_type, src_scan, dest_scan, blended_colors);
}
for (int color = 0; color < 3; color++) {
int back_color = *dest_scan;
int src_color = *src_scan;
int blended = bNonseparableBlend
? blended_colors[color]
: Blend(blend_type, back_color, src_color);
*dest_scan = blended;
dest_scan++;
src_scan++;
}
dest_scan += dest_gap;
src_scan += src_gap;
}
}
void CompositeRow_Rgb2Rgb_Blend_Clip(pdfium::span<uint8_t> dest_span,
pdfium::span<const uint8_t> src_span,
int width,
BlendMode blend_type,
int dest_Bpp,
int src_Bpp,
pdfium::span<const uint8_t> clip_span) {
uint8_t* dest_scan = dest_span.data();
const uint8_t* src_scan = src_span.data();
const uint8_t* clip_scan = clip_span.data();
int blended_colors[3];
bool bNonseparableBlend = IsNonSeparableBlendMode(blend_type);
int dest_gap = dest_Bpp - 3;
int src_gap = src_Bpp - 3;
for (int col = 0; col < width; col++) {
uint8_t src_alpha = *clip_scan++;
if (src_alpha == 0) {
dest_scan += dest_Bpp;
src_scan += src_Bpp;
continue;
}
if (bNonseparableBlend) {
RGB_Blend(blend_type, src_scan, dest_scan, blended_colors);
}
for (int color = 0; color < 3; color++) {
int src_color = *src_scan;
int back_color = *dest_scan;
int blended = bNonseparableBlend
? blended_colors[color]
: Blend(blend_type, back_color, src_color);
*dest_scan = FXDIB_ALPHA_MERGE(back_color, blended, src_alpha);
dest_scan++;
src_scan++;
}
dest_scan += dest_gap;
src_scan += src_gap;
}
}
void CompositeRow_Rgb2Rgb_NoBlend_NoClip(pdfium::span<uint8_t> dest_span,
pdfium::span<const uint8_t> src_span,
int width,
int dest_Bpp,
int src_Bpp) {
uint8_t* dest_scan = dest_span.data();
const uint8_t* src_scan = src_span.data();
if (dest_Bpp == src_Bpp) {
memcpy(dest_scan, src_scan, width * dest_Bpp);
return;
}
for (int col = 0; col < width; col++) {
memcpy(dest_scan, src_scan, 3);
dest_scan += dest_Bpp;
src_scan += src_Bpp;
}
}
void CompositeRow_Rgb2Rgb_NoBlend_Clip(pdfium::span<uint8_t> dest_span,
pdfium::span<const uint8_t> src_span,
int width,
int dest_Bpp,
int src_Bpp,
pdfium::span<const uint8_t> clip_span) {
uint8_t* dest_scan = dest_span.data();
const uint8_t* src_scan = src_span.data();
const uint8_t* clip_scan = clip_span.data();
for (int col = 0; col < width; col++) {
int src_alpha = clip_scan[col];
if (src_alpha == 255) {
memcpy(dest_scan, src_scan, 3);
} else if (src_alpha) {
*dest_scan = FXDIB_ALPHA_MERGE(*dest_scan, *src_scan, src_alpha);
dest_scan++;
src_scan++;
*dest_scan = FXDIB_ALPHA_MERGE(*dest_scan, *src_scan, src_alpha);
dest_scan++;
src_scan++;
*dest_scan = FXDIB_ALPHA_MERGE(*dest_scan, *src_scan, src_alpha);
dest_scan += dest_Bpp - 2;
src_scan += src_Bpp - 2;
continue;
}
dest_scan += dest_Bpp;
src_scan += src_Bpp;
}
}
void CompositeRow_8bppPal2Gray(pdfium::span<uint8_t> dest_span,
pdfium::span<const uint8_t> src_span,
pdfium::span<const uint8_t> palette_span,
int pixel_count,
BlendMode blend_type,
pdfium::span<const uint8_t> clip_span) {
uint8_t* dest_scan = dest_span.data();
const uint8_t* src_scan = src_span.data();
const uint8_t* clip_scan = clip_span.data();
const uint8_t* pPalette = palette_span.data();
if (blend_type != BlendMode::kNormal) {
bool bNonseparableBlend = IsNonSeparableBlendMode(blend_type);
for (int col = 0; col < pixel_count; col++) {
uint8_t gray = pPalette[*src_scan];
if (bNonseparableBlend)
gray = blend_type == BlendMode::kLuminosity ? gray : *dest_scan;
else
gray = Blend(blend_type, *dest_scan, gray);
if (clip_scan && clip_scan[col] < 255)
*dest_scan = FXDIB_ALPHA_MERGE(*dest_scan, gray, clip_scan[col]);
else
*dest_scan = gray;
dest_scan++;
src_scan++;
}
return;
}
for (int col = 0; col < pixel_count; col++) {
uint8_t gray = pPalette[*src_scan];
if (clip_scan && clip_scan[col] < 255)
*dest_scan = FXDIB_ALPHA_MERGE(*dest_scan, gray, clip_scan[col]);
else
*dest_scan = gray;
dest_scan++;
src_scan++;
}
}
void CompositeRow_1bppPal2Gray(pdfium::span<uint8_t> dest_span,
pdfium::span<const uint8_t> src_span,
int src_left,
pdfium::span<const uint8_t> src_palette,
int pixel_count,
BlendMode blend_type,
pdfium::span<const uint8_t> clip_span) {
uint8_t* dest_scan = dest_span.data();
const uint8_t* src_scan = src_span.data();
const uint8_t* clip_scan = clip_span.data();
int reset_gray = src_palette[0];
int set_gray = src_palette[1];
if (blend_type != BlendMode::kNormal) {
bool bNonseparableBlend = IsNonSeparableBlendMode(blend_type);
for (int col = 0; col < pixel_count; col++) {
uint8_t gray =
(src_scan[(col + src_left) / 8] & (1 << (7 - (col + src_left) % 8)))
? set_gray
: reset_gray;
if (bNonseparableBlend)
gray = blend_type == BlendMode::kLuminosity ? gray : *dest_scan;
else
gray = Blend(blend_type, *dest_scan, gray);
if (clip_scan && clip_scan[col] < 255) {
*dest_scan = FXDIB_ALPHA_MERGE(*dest_scan, gray, clip_scan[col]);
} else {
*dest_scan = gray;
}
dest_scan++;
}
return;
}
for (int col = 0; col < pixel_count; col++) {
uint8_t gray =
(src_scan[(col + src_left) / 8] & (1 << (7 - (col + src_left) % 8)))
? set_gray
: reset_gray;
if (clip_scan && clip_scan[col] < 255) {
*dest_scan = FXDIB_ALPHA_MERGE(*dest_scan, gray, clip_scan[col]);
} else {
*dest_scan = gray;
}
dest_scan++;
}
}
void CompositeRow_8bppRgb2Rgb_NoBlend(pdfium::span<uint8_t> dest_span,
pdfium::span<const uint8_t> src_span,
pdfium::span<const uint32_t> palette_span,
int pixel_count,
int DestBpp,
pdfium::span<const uint8_t> clip_span) {
uint8_t* dest_scan = dest_span.data();
const uint8_t* src_scan = src_span.data();
const uint8_t* clip_scan = clip_span.data();
const uint32_t* pPalette = palette_span.data();
FX_ARGB argb = 0;
for (int col = 0; col < pixel_count; col++) {
argb = pPalette[*src_scan];
int src_r = FXARGB_R(argb);
int src_g = FXARGB_G(argb);
int src_b = FXARGB_B(argb);
if (clip_scan && clip_scan[col] < 255) {
*dest_scan = FXDIB_ALPHA_MERGE(*dest_scan, src_b, clip_scan[col]);
dest_scan++;
*dest_scan = FXDIB_ALPHA_MERGE(*dest_scan, src_g, clip_scan[col]);
dest_scan++;
*dest_scan = FXDIB_ALPHA_MERGE(*dest_scan, src_r, clip_scan[col]);
dest_scan++;
} else {
*dest_scan++ = src_b;
*dest_scan++ = src_g;
*dest_scan++ = src_r;
}
if (DestBpp == 4) {
dest_scan++;
}
src_scan++;
}
}
void CompositeRow_1bppRgb2Rgb_NoBlend(pdfium::span<uint8_t> dest_span,
pdfium::span<const uint8_t> src_span,
int src_left,
pdfium::span<const uint32_t> src_palette,
int pixel_count,
int DestBpp,
pdfium::span<const uint8_t> clip_span) {
uint8_t* dest_scan = dest_span.data();
const uint8_t* src_scan = src_span.data();
const uint8_t* clip_scan = clip_span.data();
int reset_r = FXARGB_R(src_palette[0]);
int reset_g = FXARGB_G(src_palette[0]);
int reset_b = FXARGB_B(src_palette[0]);
int set_r = FXARGB_R(src_palette[1]);
int set_g = FXARGB_G(src_palette[1]);
int set_b = FXARGB_B(src_palette[1]);
for (int col = 0; col < pixel_count; col++) {
int src_r;
int src_g;
int src_b;
if (src_scan[(col + src_left) / 8] & (1 << (7 - (col + src_left) % 8))) {
src_r = set_r;
src_g = set_g;
src_b = set_b;
} else {
src_r = reset_r;
src_g = reset_g;
src_b = reset_b;
}
if (clip_scan && clip_scan[col] < 255) {
*dest_scan = FXDIB_ALPHA_MERGE(*dest_scan, src_b, clip_scan[col]);
dest_scan++;
*dest_scan = FXDIB_ALPHA_MERGE(*dest_scan, src_g, clip_scan[col]);
dest_scan++;
*dest_scan = FXDIB_ALPHA_MERGE(*dest_scan, src_r, clip_scan[col]);
dest_scan++;
} else {
*dest_scan++ = src_b;
*dest_scan++ = src_g;
*dest_scan++ = src_r;
}
if (DestBpp == 4) {
dest_scan++;
}
}
}
void CompositeRow_8bppRgb2Argb_NoBlend(
pdfium::span<uint8_t> dest_span,
pdfium::span<const uint8_t> src_span,
int width,
pdfium::span<const uint32_t> palette_span,
pdfium::span<const uint8_t> clip_span) {
uint8_t* dest_scan = dest_span.data();
const uint8_t* src_scan = src_span.data();
const uint8_t* clip_scan = clip_span.data();
const uint32_t* pPalette = palette_span.data();
for (int col = 0; col < width; col++) {
FX_ARGB argb = pPalette[*src_scan];
int src_r = FXARGB_R(argb);
int src_g = FXARGB_G(argb);
int src_b = FXARGB_B(argb);
if (!clip_scan || clip_scan[col] == 255) {
*dest_scan++ = src_b;
*dest_scan++ = src_g;
*dest_scan++ = src_r;
*dest_scan++ = 255;
src_scan++;
continue;
}
int src_alpha = clip_scan[col];
if (src_alpha == 0) {
dest_scan += 4;
src_scan++;
continue;
}
int back_alpha = dest_scan[3];
uint8_t dest_alpha = back_alpha + src_alpha - back_alpha * src_alpha / 255;
dest_scan[3] = dest_alpha;
int alpha_ratio = src_alpha * 255 / dest_alpha;
*dest_scan = FXDIB_ALPHA_MERGE(*dest_scan, src_b, alpha_ratio);
dest_scan++;
*dest_scan = FXDIB_ALPHA_MERGE(*dest_scan, src_g, alpha_ratio);
dest_scan++;
*dest_scan = FXDIB_ALPHA_MERGE(*dest_scan, src_r, alpha_ratio);
dest_scan++;
dest_scan++;
src_scan++;
}
}
void CompositeRow_1bppRgb2Argb_NoBlend(pdfium::span<uint8_t> dest_span,
pdfium::span<const uint8_t> src_span,
int src_left,
int width,
pdfium::span<const uint32_t> src_palette,
pdfium::span<const uint8_t> clip_span) {
uint8_t* dest_scan = dest_span.data();
const uint8_t* src_scan = src_span.data();
const uint8_t* clip_scan = clip_span.data();
int reset_r = FXARGB_R(src_palette[0]);
int reset_g = FXARGB_G(src_palette[0]);
int reset_b = FXARGB_B(src_palette[0]);
int set_r = FXARGB_R(src_palette[1]);
int set_g = FXARGB_G(src_palette[1]);
int set_b = FXARGB_B(src_palette[1]);
for (int col = 0; col < width; col++) {
int src_r;
int src_g;
int src_b;
if (src_scan[(col + src_left) / 8] & (1 << (7 - (col + src_left) % 8))) {
src_r = set_r;
src_g = set_g;
src_b = set_b;
} else {
src_r = reset_r;
src_g = reset_g;
src_b = reset_b;
}
if (!clip_scan || clip_scan[col] == 255) {
*dest_scan++ = src_b;
*dest_scan++ = src_g;
*dest_scan++ = src_r;
*dest_scan++ = 255;
continue;
}
int src_alpha = clip_scan[col];
if (src_alpha == 0) {
dest_scan += 4;
continue;
}
int back_alpha = dest_scan[3];
uint8_t dest_alpha = back_alpha + src_alpha - back_alpha * src_alpha / 255;
dest_scan[3] = dest_alpha;
int alpha_ratio = src_alpha * 255 / dest_alpha;
*dest_scan = FXDIB_ALPHA_MERGE(*dest_scan, src_b, alpha_ratio);
dest_scan++;
*dest_scan = FXDIB_ALPHA_MERGE(*dest_scan, src_g, alpha_ratio);
dest_scan++;
*dest_scan = FXDIB_ALPHA_MERGE(*dest_scan, src_r, alpha_ratio);
dest_scan++;
dest_scan++;
}
}
void CompositeRow_ByteMask2Argb(pdfium::span<uint8_t> dest_span,
pdfium::span<const uint8_t> src_span,
int mask_alpha,
int src_r,
int src_g,
int src_b,
int pixel_count,
BlendMode blend_type,
pdfium::span<const uint8_t> clip_span) {
uint8_t* dest_scan = dest_span.data();
const uint8_t* src_scan = src_span.data();
const uint8_t* clip_scan = clip_span.data();
for (int col = 0; col < pixel_count; col++) {
int src_alpha = GetAlphaWithSrc(mask_alpha, clip_scan, src_scan, col);
uint8_t back_alpha = dest_scan[3];
if (back_alpha == 0) {
FXARGB_SETDIB(dest_scan, ArgbEncode(src_alpha, src_r, src_g, src_b));
dest_scan += 4;
continue;
}
if (src_alpha == 0) {
dest_scan += 4;
continue;
}
uint8_t dest_alpha = back_alpha + src_alpha - back_alpha * src_alpha / 255;
dest_scan[3] = dest_alpha;
int alpha_ratio = src_alpha * 255 / dest_alpha;
if (IsNonSeparableBlendMode(blend_type)) {
int blended_colors[3];
uint8_t scan[3] = {static_cast<uint8_t>(src_b),
static_cast<uint8_t>(src_g),
static_cast<uint8_t>(src_r)};
RGB_Blend(blend_type, scan, dest_scan, blended_colors);
*dest_scan =
FXDIB_ALPHA_MERGE(*dest_scan, blended_colors[0], alpha_ratio);
dest_scan++;
*dest_scan =
FXDIB_ALPHA_MERGE(*dest_scan, blended_colors[1], alpha_ratio);
dest_scan++;
*dest_scan =
FXDIB_ALPHA_MERGE(*dest_scan, blended_colors[2], alpha_ratio);
} else if (blend_type != BlendMode::kNormal) {
int blended = Blend(blend_type, *dest_scan, src_b);
blended = FXDIB_ALPHA_MERGE(src_b, blended, back_alpha);
*dest_scan = FXDIB_ALPHA_MERGE(*dest_scan, blended, alpha_ratio);
dest_scan++;
blended = Blend(blend_type, *dest_scan, src_g);
blended = FXDIB_ALPHA_MERGE(src_g, blended, back_alpha);
*dest_scan = FXDIB_ALPHA_MERGE(*dest_scan, blended, alpha_ratio);
dest_scan++;
blended = Blend(blend_type, *dest_scan, src_r);
blended = FXDIB_ALPHA_MERGE(src_r, blended, back_alpha);
*dest_scan = FXDIB_ALPHA_MERGE(*dest_scan, blended, alpha_ratio);
} else {
*dest_scan = FXDIB_ALPHA_MERGE(*dest_scan, src_b, alpha_ratio);
dest_scan++;
*dest_scan = FXDIB_ALPHA_MERGE(*dest_scan, src_g, alpha_ratio);
dest_scan++;
*dest_scan = FXDIB_ALPHA_MERGE(*dest_scan, src_r, alpha_ratio);
}
dest_scan += 2;
}
}
void CompositeRow_ByteMask2Rgb(pdfium::span<uint8_t> dest_span,
pdfium::span<const uint8_t> src_span,
int mask_alpha,
int src_r,
int src_g,
int src_b,
int pixel_count,
BlendMode blend_type,
int Bpp,
pdfium::span<const uint8_t> clip_span) {
uint8_t* dest_scan = dest_span.data();
const uint8_t* src_scan = src_span.data();
const uint8_t* clip_scan = clip_span.data();
for (int col = 0; col < pixel_count; col++) {
int src_alpha = GetAlphaWithSrc(mask_alpha, clip_scan, src_scan, col);
if (src_alpha == 0) {
dest_scan += Bpp;
continue;
}
if (IsNonSeparableBlendMode(blend_type)) {
int blended_colors[3];
uint8_t scan[3] = {static_cast<uint8_t>(src_b),
static_cast<uint8_t>(src_g),
static_cast<uint8_t>(src_r)};
RGB_Blend(blend_type, scan, dest_scan, blended_colors);
*dest_scan = FXDIB_ALPHA_MERGE(*dest_scan, blended_colors[0], src_alpha);
dest_scan++;
*dest_scan = FXDIB_ALPHA_MERGE(*dest_scan, blended_colors[1], src_alpha);
dest_scan++;
*dest_scan = FXDIB_ALPHA_MERGE(*dest_scan, blended_colors[2], src_alpha);
} else if (blend_type != BlendMode::kNormal) {
int blended = Blend(blend_type, *dest_scan, src_b);
*dest_scan = FXDIB_ALPHA_MERGE(*dest_scan, blended, src_alpha);
dest_scan++;
blended = Blend(blend_type, *dest_scan, src_g);
*dest_scan = FXDIB_ALPHA_MERGE(*dest_scan, blended, src_alpha);
dest_scan++;
blended = Blend(blend_type, *dest_scan, src_r);
*dest_scan = FXDIB_ALPHA_MERGE(*dest_scan, blended, src_alpha);
} else {
*dest_scan = FXDIB_ALPHA_MERGE(*dest_scan, src_b, src_alpha);
dest_scan++;
*dest_scan = FXDIB_ALPHA_MERGE(*dest_scan, src_g, src_alpha);
dest_scan++;
*dest_scan = FXDIB_ALPHA_MERGE(*dest_scan, src_r, src_alpha);
}
dest_scan += Bpp - 2;
}
}
void CompositeRow_ByteMask2Mask(pdfium::span<uint8_t> dest_span,
pdfium::span<const uint8_t> src_span,
int mask_alpha,
int pixel_count,
pdfium::span<const uint8_t> clip_span) {
uint8_t* dest_scan = dest_span.data();
const uint8_t* src_scan = src_span.data();
const uint8_t* clip_scan = clip_span.data();
for (int col = 0; col < pixel_count; col++) {
int src_alpha = GetAlphaWithSrc(mask_alpha, clip_scan, src_scan, col);
uint8_t back_alpha = *dest_scan;
if (!back_alpha) {
*dest_scan = src_alpha;
} else if (src_alpha) {
*dest_scan = back_alpha + src_alpha - back_alpha * src_alpha / 255;
}
dest_scan++;
}
}
void CompositeRow_ByteMask2Gray(pdfium::span<uint8_t> dest_span,
pdfium::span<const uint8_t> src_span,
int mask_alpha,
int src_gray,
int pixel_count,
pdfium::span<const uint8_t> clip_span) {
uint8_t* dest_scan = dest_span.data();
const uint8_t* src_scan = src_span.data();
const uint8_t* clip_scan = clip_span.data();
for (int col = 0; col < pixel_count; col++) {
int src_alpha = GetAlphaWithSrc(mask_alpha, clip_scan, src_scan, col);
if (src_alpha) {
*dest_scan = FXDIB_ALPHA_MERGE(*dest_scan, src_gray, src_alpha);
}
dest_scan++;
}
}
void CompositeRow_BitMask2Argb(pdfium::span<uint8_t> dest_span,
pdfium::span<const uint8_t> src_span,
int mask_alpha,
int src_r,
int src_g,
int src_b,
int src_left,
int pixel_count,
BlendMode blend_type,
pdfium::span<const uint8_t> clip_span) {
uint8_t* dest_scan = dest_span.data();
const uint8_t* src_scan = src_span.data();
const uint8_t* clip_scan = clip_span.data();
if (blend_type == BlendMode::kNormal && !clip_scan && mask_alpha == 255) {
FX_ARGB argb = ArgbEncode(0xff, src_r, src_g, src_b);
for (int col = 0; col < pixel_count; col++) {
if (src_scan[(src_left + col) / 8] & (1 << (7 - (src_left + col) % 8))) {
FXARGB_SETDIB(dest_scan, argb);
}
dest_scan += 4;
}
return;
}
for (int col = 0; col < pixel_count; col++) {
if (!(src_scan[(src_left + col) / 8] & (1 << (7 - (src_left + col) % 8)))) {
dest_scan += 4;
continue;
}
int src_alpha = GetAlpha(mask_alpha, clip_scan, col);
uint8_t back_alpha = dest_scan[3];
if (back_alpha == 0) {
FXARGB_SETDIB(dest_scan, ArgbEncode(src_alpha, src_r, src_g, src_b));
dest_scan += 4;
continue;
}
uint8_t dest_alpha = back_alpha + src_alpha - back_alpha * src_alpha / 255;
dest_scan[3] = dest_alpha;
int alpha_ratio = src_alpha * 255 / dest_alpha;
if (IsNonSeparableBlendMode(blend_type)) {
int blended_colors[3];
uint8_t scan[3] = {static_cast<uint8_t>(src_b),
static_cast<uint8_t>(src_g),
static_cast<uint8_t>(src_r)};
RGB_Blend(blend_type, scan, dest_scan, blended_colors);
*dest_scan =
FXDIB_ALPHA_MERGE(*dest_scan, blended_colors[0], alpha_ratio);
dest_scan++;
*dest_scan =
FXDIB_ALPHA_MERGE(*dest_scan, blended_colors[1], alpha_ratio);
dest_scan++;
*dest_scan =
FXDIB_ALPHA_MERGE(*dest_scan, blended_colors[2], alpha_ratio);
} else if (blend_type != BlendMode::kNormal) {
int blended = Blend(blend_type, *dest_scan, src_b);
blended = FXDIB_ALPHA_MERGE(src_b, blended, back_alpha);
*dest_scan = FXDIB_ALPHA_MERGE(*dest_scan, blended, alpha_ratio);
dest_scan++;
blended = Blend(blend_type, *dest_scan, src_g);
blended = FXDIB_ALPHA_MERGE(src_g, blended, back_alpha);
*dest_scan = FXDIB_ALPHA_MERGE(*dest_scan, blended, alpha_ratio);
dest_scan++;
blended = Blend(blend_type, *dest_scan, src_r);
blended = FXDIB_ALPHA_MERGE(src_r, blended, back_alpha);
*dest_scan = FXDIB_ALPHA_MERGE(*dest_scan, blended, alpha_ratio);
} else {
*dest_scan = FXDIB_ALPHA_MERGE(*dest_scan, src_b, alpha_ratio);
dest_scan++;
*dest_scan = FXDIB_ALPHA_MERGE(*dest_scan, src_g, alpha_ratio);
dest_scan++;
*dest_scan = FXDIB_ALPHA_MERGE(*dest_scan, src_r, alpha_ratio);
}
dest_scan += 2;
}
}
void CompositeRow_BitMask2Rgb(pdfium::span<uint8_t> dest_span,
pdfium::span<const uint8_t> src_span,
int mask_alpha,
int src_r,
int src_g,
int src_b,
int src_left,
int pixel_count,
BlendMode blend_type,
int Bpp,
pdfium::span<const uint8_t> clip_span) {
uint8_t* dest_scan = dest_span.data();
const uint8_t* src_scan = src_span.data();
const uint8_t* clip_scan = clip_span.data();
if (blend_type == BlendMode::kNormal && !clip_scan && mask_alpha == 255) {
for (int col = 0; col < pixel_count; col++) {
if (src_scan[(src_left + col) / 8] & (1 << (7 - (src_left + col) % 8))) {
dest_scan[2] = src_r;
dest_scan[1] = src_g;
dest_scan[0] = src_b;
}
dest_scan += Bpp;
}
return;
}
for (int col = 0; col < pixel_count; col++) {
if (!(src_scan[(src_left + col) / 8] & (1 << (7 - (src_left + col) % 8)))) {
dest_scan += Bpp;
continue;
}
int src_alpha = GetAlpha(mask_alpha, clip_scan, col);
if (src_alpha == 0) {
dest_scan += Bpp;
continue;
}
if (IsNonSeparableBlendMode(blend_type)) {
int blended_colors[3];
uint8_t scan[3] = {static_cast<uint8_t>(src_b),
static_cast<uint8_t>(src_g),
static_cast<uint8_t>(src_r)};
RGB_Blend(blend_type, scan, dest_scan, blended_colors);
*dest_scan = FXDIB_ALPHA_MERGE(*dest_scan, blended_colors[0], src_alpha);
dest_scan++;
*dest_scan = FXDIB_ALPHA_MERGE(*dest_scan, blended_colors[1], src_alpha);
dest_scan++;
*dest_scan = FXDIB_ALPHA_MERGE(*dest_scan, blended_colors[2], src_alpha);
} else if (blend_type != BlendMode::kNormal) {
int blended = Blend(blend_type, *dest_scan, src_b);
*dest_scan = FXDIB_ALPHA_MERGE(*dest_scan, blended, src_alpha);
dest_scan++;
blended = Blend(blend_type, *dest_scan, src_g);
*dest_scan = FXDIB_ALPHA_MERGE(*dest_scan, blended, src_alpha);
dest_scan++;
blended = Blend(blend_type, *dest_scan, src_r);
*dest_scan = FXDIB_ALPHA_MERGE(*dest_scan, blended, src_alpha);
} else {
*dest_scan = FXDIB_ALPHA_MERGE(*dest_scan, src_b, src_alpha);
dest_scan++;
*dest_scan = FXDIB_ALPHA_MERGE(*dest_scan, src_g, src_alpha);
dest_scan++;
*dest_scan = FXDIB_ALPHA_MERGE(*dest_scan, src_r, src_alpha);
}
dest_scan += Bpp - 2;
}
}
void CompositeRow_BitMask2Mask(pdfium::span<uint8_t> dest_span,
pdfium::span<const uint8_t> src_span,
int mask_alpha,
int src_left,
int pixel_count,
pdfium::span<const uint8_t> clip_span) {
uint8_t* dest_scan = dest_span.data();
const uint8_t* src_scan = src_span.data();
const uint8_t* clip_scan = clip_span.data();
for (int col = 0; col < pixel_count; col++) {
if (!(src_scan[(src_left + col) / 8] & (1 << (7 - (src_left + col) % 8)))) {
dest_scan++;
continue;
}
int src_alpha = GetAlpha(mask_alpha, clip_scan, col);
uint8_t back_alpha = *dest_scan;
if (!back_alpha) {
*dest_scan = src_alpha;
} else if (src_alpha) {
*dest_scan = back_alpha + src_alpha - back_alpha * src_alpha / 255;
}
dest_scan++;
}
}
void CompositeRow_BitMask2Gray(pdfium::span<uint8_t> dest_span,
pdfium::span<const uint8_t> src_span,
int mask_alpha,
int src_gray,
int src_left,
int pixel_count,
pdfium::span<const uint8_t> clip_span) {
uint8_t* dest_scan = dest_span.data();
const uint8_t* src_scan = src_span.data();
const uint8_t* clip_scan = clip_span.data();
for (int col = 0; col < pixel_count; col++) {
if (!(src_scan[(src_left + col) / 8] & (1 << (7 - (src_left + col) % 8)))) {
dest_scan++;
continue;
}
int src_alpha = GetAlpha(mask_alpha, clip_scan, col);
if (src_alpha) {
*dest_scan = FXDIB_ALPHA_MERGE(*dest_scan, src_gray, src_alpha);
}
dest_scan++;
}
}
void CompositeRow_Argb2Argb_RgbByteOrder(
pdfium::span<uint8_t> dest_span,
pdfium::span<const uint8_t> src_span,
int pixel_count,
BlendMode blend_type,
pdfium::span<const uint8_t> clip_span) {
uint8_t* dest_scan = dest_span.data();
const uint8_t* src_scan = src_span.data();
const uint8_t* clip_scan = clip_span.data();
bool bNonseparableBlend = IsNonSeparableBlendMode(blend_type);
int blended_colors[3];
for (int col = 0; col < pixel_count; col++) {
uint8_t back_alpha = dest_scan[3];
if (back_alpha == 0) {
if (clip_scan) {
int src_alpha = clip_scan[col] * src_scan[3] / 255;
ReverseCopy3Bytes(dest_scan, src_scan);
dest_scan[3] = src_alpha;
} else {
FXARGB_RGBORDERCOPY(dest_scan, src_scan);
}
dest_scan += 4;
src_scan += 4;
continue;
}
uint8_t src_alpha = GetAlpha(src_scan[3], clip_scan, col);
if (src_alpha == 0) {
dest_scan += 4;
src_scan += 4;
continue;
}
uint8_t dest_alpha = back_alpha + src_alpha - back_alpha * src_alpha / 255;
dest_scan[3] = dest_alpha;
int alpha_ratio = src_alpha * 255 / dest_alpha;
if (bNonseparableBlend) {
uint8_t dest_scan_o[3];
ReverseCopy3Bytes(dest_scan_o, dest_scan);
RGB_Blend(blend_type, src_scan, dest_scan_o, blended_colors);
}
for (int color = 0; color < 3; color++) {
int index = 2 - color;
if (blend_type != BlendMode::kNormal) {
int blended = bNonseparableBlend
? blended_colors[color]
: Blend(blend_type, dest_scan[index], *src_scan);
blended = FXDIB_ALPHA_MERGE(*src_scan, blended, back_alpha);
dest_scan[index] =
FXDIB_ALPHA_MERGE(dest_scan[index], blended, alpha_ratio);
} else {
dest_scan[index] =
FXDIB_ALPHA_MERGE(dest_scan[index], *src_scan, alpha_ratio);
}
src_scan++;
}
dest_scan += 4;
src_scan++;
}
}
void CompositeRow_Rgb2Argb_Blend_NoClip_RgbByteOrder(
pdfium::span<uint8_t> dest_span,
pdfium::span<const uint8_t> src_span,
int width,
BlendMode blend_type,
int src_Bpp) {
uint8_t* dest_scan = dest_span.data();
const uint8_t* src_scan = src_span.data();
bool bNonseparableBlend = IsNonSeparableBlendMode(blend_type);
int src_gap = src_Bpp - 3;
int blended_colors[3];
for (int col = 0; col < width; col++) {
uint8_t back_alpha = dest_scan[3];
if (back_alpha == 0) {
if (src_Bpp == 4) {
FXARGB_SETRGBORDERDIB(dest_scan, 0xff000000 | FXARGB_GETDIB(src_scan));
} else {
FXARGB_SETRGBORDERDIB(
dest_scan, ArgbEncode(0xff, src_scan[2], src_scan[1], src_scan[0]));
}
dest_scan += 4;
src_scan += src_Bpp;
continue;
}
dest_scan[3] = 0xff;
if (bNonseparableBlend) {
uint8_t dest_scan_o[3];
ReverseCopy3Bytes(dest_scan_o, dest_scan);
RGB_Blend(blend_type, src_scan, dest_scan_o, blended_colors);
}
for (int color = 0; color < 3; color++) {
int index = 2 - color;
int src_color = *src_scan;
int blended = bNonseparableBlend
? blended_colors[color]
: Blend(blend_type, dest_scan[index], src_color);
dest_scan[index] = FXDIB_ALPHA_MERGE(src_color, blended, back_alpha);
src_scan++;
}
dest_scan += 4;
src_scan += src_gap;
}
}
void CompositeRow_Argb2Rgb_Blend_RgbByteOrder(
pdfium::span<uint8_t> dest_span,
pdfium::span<const uint8_t> src_span,
int width,
BlendMode blend_type,
int dest_Bpp,
pdfium::span<const uint8_t> clip_span) {
int blended_colors[3];
bool bNonseparableBlend = IsNonSeparableBlendMode(blend_type);
uint8_t* dest_scan = dest_span.data();
const uint8_t* src_scan = src_span.data();
const uint8_t* clip_scan = clip_span.data();
for (int col = 0; col < width; col++) {
uint8_t src_alpha;
if (clip_scan) {
src_alpha = src_scan[3] * (*clip_scan++) / 255;
} else {
src_alpha = src_scan[3];
}
if (src_alpha == 0) {
dest_scan += dest_Bpp;
src_scan += 4;
continue;
}
if (bNonseparableBlend) {
uint8_t dest_scan_o[3];
ReverseCopy3Bytes(dest_scan_o, dest_scan);
RGB_Blend(blend_type, src_scan, dest_scan_o, blended_colors);
}
for (int color = 0; color < 3; color++) {
int index = 2 - color;
int back_color = dest_scan[index];
int blended = bNonseparableBlend
? blended_colors[color]
: Blend(blend_type, back_color, *src_scan);
dest_scan[index] = FXDIB_ALPHA_MERGE(back_color, blended, src_alpha);
src_scan++;
}
dest_scan += dest_Bpp;
src_scan++;
}
}
void CompositeRow_Rgb2Argb_NoBlend_NoClip_RgbByteOrder(
pdfium::span<uint8_t> dest_span,
pdfium::span<const uint8_t> src_span,
int width,
int src_Bpp) {
uint8_t* dest_scan = dest_span.data();
const uint8_t* src_scan = src_span.data();
for (int col = 0; col < width; col++) {
if (src_Bpp == 4) {
FXARGB_SETRGBORDERDIB(dest_scan, 0xff000000 | FXARGB_GETDIB(src_scan));
} else {
FXARGB_SETRGBORDERDIB(
dest_scan, ArgbEncode(0xff, src_scan[2], src_scan[1], src_scan[0]));
}
dest_scan += 4;
src_scan += src_Bpp;
}
}
void CompositeRow_Rgb2Rgb_Blend_NoClip_RgbByteOrder(
pdfium::span<uint8_t> dest_span,
pdfium::span<const uint8_t> src_span,
int width,
BlendMode blend_type,
int dest_Bpp,
int src_Bpp) {
int blended_colors[3];
bool bNonseparableBlend = IsNonSeparableBlendMode(blend_type);
uint8_t* dest_scan = dest_span.data();
const uint8_t* src_scan = src_span.data();
int src_gap = src_Bpp - 3;
for (int col = 0; col < width; col++) {
if (bNonseparableBlend) {
uint8_t dest_scan_o[3];
ReverseCopy3Bytes(dest_scan_o, dest_scan);
RGB_Blend(blend_type, src_scan, dest_scan_o, blended_colors);
}
for (int color = 0; color < 3; color++) {
int index = 2 - color;
int back_color = dest_scan[index];
int src_color = *src_scan;
int blended = bNonseparableBlend
? blended_colors[color]
: Blend(blend_type, back_color, src_color);
dest_scan[index] = blended;
src_scan++;
}
dest_scan += dest_Bpp;
src_scan += src_gap;
}
}
void CompositeRow_Argb2Rgb_NoBlend_RgbByteOrder(
pdfium::span<uint8_t> dest_span,
pdfium::span<const uint8_t> src_span,
int width,
int dest_Bpp,
pdfium::span<const uint8_t> clip_span) {
uint8_t* dest_scan = dest_span.data();
const uint8_t* src_scan = src_span.data();
const uint8_t* clip_scan = clip_span.data();
for (int col = 0; col < width; col++) {
uint8_t src_alpha;
if (clip_scan) {
src_alpha = src_scan[3] * (*clip_scan++) / 255;
} else {
src_alpha = src_scan[3];
}
if (src_alpha == 255) {
ReverseCopy3Bytes(dest_scan, src_scan);
dest_scan += dest_Bpp;
src_scan += 4;
continue;
}
if (src_alpha == 0) {
dest_scan += dest_Bpp;
src_scan += 4;
continue;
}
for (int color = 0; color < 3; color++) {
int index = 2 - color;
dest_scan[index] =
FXDIB_ALPHA_MERGE(dest_scan[index], *src_scan, src_alpha);
src_scan++;
}
dest_scan += dest_Bpp;
src_scan++;
}
}
void CompositeRow_Rgb2Rgb_NoBlend_NoClip_RgbByteOrder(
pdfium::span<uint8_t> dest_span,
pdfium::span<const uint8_t> src_span,
int width,
int dest_Bpp,
int src_Bpp) {
uint8_t* dest_scan = dest_span.data();
const uint8_t* src_scan = src_span.data();
for (int col = 0; col < width; col++) {
ReverseCopy3Bytes(dest_scan, src_scan);
dest_scan += dest_Bpp;
src_scan += src_Bpp;
}
}
void CompositeRow_Rgb2Argb_Blend_Clip_RgbByteOrder(
pdfium::span<uint8_t> dest_span,
pdfium::span<const uint8_t> src_span,
int width,
BlendMode blend_type,
int src_Bpp,
pdfium::span<const uint8_t> clip_span) {
uint8_t* dest_scan = dest_span.data();
const uint8_t* src_scan = src_span.data();
const uint8_t* clip_scan = clip_span.data();
int blended_colors[3];
bool bNonseparableBlend = IsNonSeparableBlendMode(blend_type);
int src_gap = src_Bpp - 3;
for (int col = 0; col < width; col++) {
int src_alpha = *clip_scan++;
uint8_t back_alpha = dest_scan[3];
if (back_alpha == 0) {
ReverseCopy3Bytes(dest_scan, src_scan);
src_scan += src_Bpp;
dest_scan += 4;
continue;
}
if (src_alpha == 0) {
dest_scan += 4;
src_scan += src_Bpp;
continue;
}
uint8_t dest_alpha = back_alpha + src_alpha - back_alpha * src_alpha / 255;
dest_scan[3] = dest_alpha;
int alpha_ratio = src_alpha * 255 / dest_alpha;
if (bNonseparableBlend) {
uint8_t dest_scan_o[3];
ReverseCopy3Bytes(dest_scan_o, dest_scan);
RGB_Blend(blend_type, src_scan, dest_scan_o, blended_colors);
}
for (int color = 0; color < 3; color++) {
int index = 2 - color;
int src_color = *src_scan;
int blended = bNonseparableBlend
? blended_colors[color]
: Blend(blend_type, dest_scan[index], src_color);
blended = FXDIB_ALPHA_MERGE(src_color, blended, back_alpha);
dest_scan[index] =
FXDIB_ALPHA_MERGE(dest_scan[index], blended, alpha_ratio);
src_scan++;
}
dest_scan += 4;
src_scan += src_gap;
}
}
void CompositeRow_Rgb2Rgb_Blend_Clip_RgbByteOrder(
pdfium::span<uint8_t> dest_span,
pdfium::span<const uint8_t> src_span,
int width,
BlendMode blend_type,
int dest_Bpp,
int src_Bpp,
pdfium::span<const uint8_t> clip_span) {
uint8_t* dest_scan = dest_span.data();
const uint8_t* src_scan = src_span.data();
const uint8_t* clip_scan = clip_span.data();
int blended_colors[3];
bool bNonseparableBlend = IsNonSeparableBlendMode(blend_type);
int src_gap = src_Bpp - 3;
for (int col = 0; col < width; col++) {
uint8_t src_alpha = *clip_scan++;
if (src_alpha == 0) {
dest_scan += dest_Bpp;
src_scan += src_Bpp;
continue;
}
if (bNonseparableBlend) {
uint8_t dest_scan_o[3];
ReverseCopy3Bytes(dest_scan_o, dest_scan);
RGB_Blend(blend_type, src_scan, dest_scan_o, blended_colors);
}
for (int color = 0; color < 3; color++) {
int index = 2 - color;
int src_color = *src_scan;
int back_color = dest_scan[index];
int blended = bNonseparableBlend
? blended_colors[color]
: Blend(blend_type, back_color, src_color);
dest_scan[index] = FXDIB_ALPHA_MERGE(back_color, blended, src_alpha);
src_scan++;
}
dest_scan += dest_Bpp;
src_scan += src_gap;
}
}
void CompositeRow_Rgb2Argb_NoBlend_Clip_RgbByteOrder(
pdfium::span<uint8_t> dest_span,
pdfium::span<const uint8_t> src_span,
int width,
int src_Bpp,
pdfium::span<const uint8_t> clip_span) {
uint8_t* dest_scan = dest_span.data();
const uint8_t* src_scan = src_span.data();
const uint8_t* clip_scan = clip_span.data();
int src_gap = src_Bpp - 3;
for (int col = 0; col < width; col++) {
int src_alpha = clip_scan[col];
if (src_alpha == 255) {
ReverseCopy3Bytes(dest_scan, src_scan);
dest_scan[3] = 255;
dest_scan += 4;
src_scan += src_Bpp;
continue;
}
if (src_alpha == 0) {
dest_scan += 4;
src_scan += src_Bpp;
continue;
}
int back_alpha = dest_scan[3];
uint8_t dest_alpha = back_alpha + src_alpha - back_alpha * src_alpha / 255;
dest_scan[3] = dest_alpha;
int alpha_ratio = src_alpha * 255 / dest_alpha;
for (int color = 0; color < 3; color++) {
int index = 2 - color;
dest_scan[index] =
FXDIB_ALPHA_MERGE(dest_scan[index], *src_scan, alpha_ratio);
src_scan++;
}
dest_scan += 4;
src_scan += src_gap;
}
}
void CompositeRow_Rgb2Rgb_NoBlend_Clip_RgbByteOrder(
pdfium::span<uint8_t> dest_span,
pdfium::span<const uint8_t> src_span,
int width,
int dest_Bpp,
int src_Bpp,
pdfium::span<const uint8_t> clip_span) {
uint8_t* dest_scan = dest_span.data();
const uint8_t* src_scan = src_span.data();
const uint8_t* clip_scan = clip_span.data();
for (int col = 0; col < width; col++) {
int src_alpha = clip_scan[col];
if (src_alpha == 255) {
ReverseCopy3Bytes(dest_scan, src_scan);
} else if (src_alpha) {
dest_scan[2] = FXDIB_ALPHA_MERGE(dest_scan[2], *src_scan, src_alpha);
src_scan++;
dest_scan[1] = FXDIB_ALPHA_MERGE(dest_scan[1], *src_scan, src_alpha);
src_scan++;
dest_scan[0] = FXDIB_ALPHA_MERGE(dest_scan[0], *src_scan, src_alpha);
dest_scan += dest_Bpp;
src_scan += src_Bpp - 2;
continue;
}
dest_scan += dest_Bpp;
src_scan += src_Bpp;
}
}
void CompositeRow_8bppRgb2Rgb_NoBlend_RgbByteOrder(
pdfium::span<uint8_t> dest_span,
pdfium::span<const uint8_t> src_span,
const FX_ARGB* pPalette,
int pixel_count,
int DestBpp,
pdfium::span<const uint8_t> clip_span) {
uint8_t* dest_scan = dest_span.data();
const uint8_t* src_scan = src_span.data();
const uint8_t* clip_scan = clip_span.data();
for (int col = 0; col < pixel_count; col++) {
FX_ARGB argb = pPalette ? pPalette[*src_scan]
: ArgbEncode(0, *src_scan, *src_scan, *src_scan);
int src_r = FXARGB_R(argb);
int src_g = FXARGB_G(argb);
int src_b = FXARGB_B(argb);
if (clip_scan && clip_scan[col] < 255) {
dest_scan[2] = FXDIB_ALPHA_MERGE(dest_scan[2], src_b, clip_scan[col]);
dest_scan[1] = FXDIB_ALPHA_MERGE(dest_scan[1], src_g, clip_scan[col]);
dest_scan[0] = FXDIB_ALPHA_MERGE(dest_scan[0], src_r, clip_scan[col]);
} else {
dest_scan[2] = src_b;
dest_scan[1] = src_g;
dest_scan[0] = src_r;
}
dest_scan += DestBpp;
src_scan++;
}
}
void CompositeRow_1bppRgb2Rgb_NoBlend_RgbByteOrder(
pdfium::span<uint8_t> dest_span,
pdfium::span<const uint8_t> src_span,
int src_left,
pdfium::span<const FX_ARGB> src_palette,
int pixel_count,
int DestBpp,
pdfium::span<const uint8_t> clip_span) {
uint8_t* dest_scan = dest_span.data();
const uint8_t* src_scan = src_span.data();
const uint8_t* clip_scan = clip_span.data();
int reset_r;
int reset_g;
int reset_b;
int set_r;
int set_g;
int set_b;
if (!src_palette.empty()) {
reset_r = FXARGB_R(src_palette[0]);
reset_g = FXARGB_G(src_palette[0]);
reset_b = FXARGB_B(src_palette[0]);
set_r = FXARGB_R(src_palette[1]);
set_g = FXARGB_G(src_palette[1]);
set_b = FXARGB_B(src_palette[1]);
} else {
reset_r = reset_g = reset_b = 0;
set_r = set_g = set_b = 255;
}
for (int col = 0; col < pixel_count; col++) {
int src_r;
int src_g;
int src_b;
if (src_scan[(col + src_left) / 8] & (1 << (7 - (col + src_left) % 8))) {
src_r = set_r;
src_g = set_g;
src_b = set_b;
} else {
src_r = reset_r;
src_g = reset_g;
src_b = reset_b;
}
if (clip_scan && clip_scan[col] < 255) {
dest_scan[2] = FXDIB_ALPHA_MERGE(dest_scan[2], src_b, clip_scan[col]);
dest_scan[1] = FXDIB_ALPHA_MERGE(dest_scan[1], src_g, clip_scan[col]);
dest_scan[0] = FXDIB_ALPHA_MERGE(dest_scan[0], src_r, clip_scan[col]);
} else {
dest_scan[2] = src_b;
dest_scan[1] = src_g;
dest_scan[0] = src_r;
}
dest_scan += DestBpp;
}
}
void CompositeRow_8bppRgb2Argb_NoBlend_RgbByteOrder(
pdfium::span<uint8_t> dest_span,
pdfium::span<const uint8_t> src_span,
int width,
const FX_ARGB* pPalette,
pdfium::span<const uint8_t> clip_span) {
uint8_t* dest_scan = dest_span.data();
const uint8_t* src_scan = src_span.data();
const uint8_t* clip_scan = clip_span.data();
for (int col = 0; col < width; col++) {
int src_r;
int src_g;
int src_b;
if (pPalette) {
FX_ARGB argb = pPalette[*src_scan];
src_r = FXARGB_R(argb);
src_g = FXARGB_G(argb);
src_b = FXARGB_B(argb);
} else {
src_r = src_g = src_b = *src_scan;
}
if (!clip_scan || clip_scan[col] == 255) {
dest_scan[2] = src_b;
dest_scan[1] = src_g;
dest_scan[0] = src_r;
dest_scan[3] = 255;
src_scan++;
dest_scan += 4;
continue;
}
int src_alpha = clip_scan[col];
if (src_alpha == 0) {
dest_scan += 4;
src_scan++;
continue;
}
int back_alpha = dest_scan[3];
uint8_t dest_alpha = back_alpha + src_alpha - back_alpha * src_alpha / 255;
dest_scan[3] = dest_alpha;
int alpha_ratio = src_alpha * 255 / dest_alpha;
dest_scan[2] = FXDIB_ALPHA_MERGE(dest_scan[2], src_b, alpha_ratio);
dest_scan[1] = FXDIB_ALPHA_MERGE(dest_scan[1], src_g, alpha_ratio);
dest_scan[0] = FXDIB_ALPHA_MERGE(dest_scan[0], src_r, alpha_ratio);
dest_scan += 4;
src_scan++;
}
}
void CompositeRow_1bppRgb2Argb_NoBlend_RgbByteOrder(
pdfium::span<uint8_t> dest_span,
pdfium::span<const uint8_t> src_span,
int src_left,
int width,
pdfium::span<const FX_ARGB> src_palette,
pdfium::span<const uint8_t> clip_span) {
uint8_t* dest_scan = dest_span.data();
const uint8_t* src_scan = src_span.data();
const uint8_t* clip_scan = clip_span.data();
int reset_r;
int reset_g;
int reset_b;
int set_r;
int set_g;
int set_b;
if (!src_palette.empty()) {
reset_r = FXARGB_R(src_palette[0]);
reset_g = FXARGB_G(src_palette[0]);
reset_b = FXARGB_B(src_palette[0]);
set_r = FXARGB_R(src_palette[1]);
set_g = FXARGB_G(src_palette[1]);
set_b = FXARGB_B(src_palette[1]);
} else {
reset_r = reset_g = reset_b = 0;
set_r = set_g = set_b = 255;
}
for (int col = 0; col < width; col++) {
int src_r;
int src_g;
int src_b;
if (src_scan[(col + src_left) / 8] & (1 << (7 - (col + src_left) % 8))) {
src_r = set_r;
src_g = set_g;
src_b = set_b;
} else {
src_r = reset_r;
src_g = reset_g;
src_b = reset_b;
}
if (!clip_scan || clip_scan[col] == 255) {
dest_scan[2] = src_b;
dest_scan[1] = src_g;
dest_scan[0] = src_r;
dest_scan[3] = 255;
dest_scan += 4;
continue;
}
int src_alpha = clip_scan[col];
if (src_alpha == 0) {
dest_scan += 4;
continue;
}
int back_alpha = dest_scan[3];
uint8_t dest_alpha = back_alpha + src_alpha - back_alpha * src_alpha / 255;
dest_scan[3] = dest_alpha;
int alpha_ratio = src_alpha * 255 / dest_alpha;
dest_scan[2] = FXDIB_ALPHA_MERGE(dest_scan[2], src_b, alpha_ratio);
dest_scan[1] = FXDIB_ALPHA_MERGE(dest_scan[1], src_g, alpha_ratio);
dest_scan[0] = FXDIB_ALPHA_MERGE(dest_scan[0], src_r, alpha_ratio);
dest_scan += 4;
}
}
void CompositeRow_ByteMask2Argb_RgbByteOrder(
pdfium::span<uint8_t> dest_span,
pdfium::span<const uint8_t> src_span,
int mask_alpha,
int src_r,
int src_g,
int src_b,
int pixel_count,
BlendMode blend_type,
pdfium::span<const uint8_t> clip_span) {
uint8_t* dest_scan = dest_span.data();
const uint8_t* src_scan = src_span.data();
const uint8_t* clip_scan = clip_span.data();
for (int col = 0; col < pixel_count; col++) {
int src_alpha = GetAlphaWithSrc(mask_alpha, clip_scan, src_scan, col);
uint8_t back_alpha = dest_scan[3];
if (back_alpha == 0) {
FXARGB_SETRGBORDERDIB(dest_scan,
ArgbEncode(src_alpha, src_r, src_g, src_b));
dest_scan += 4;
continue;
}
if (src_alpha == 0) {
dest_scan += 4;
continue;
}
uint8_t dest_alpha = back_alpha + src_alpha - back_alpha * src_alpha / 255;
dest_scan[3] = dest_alpha;
int alpha_ratio = src_alpha * 255 / dest_alpha;
if (IsNonSeparableBlendMode(blend_type)) {
int blended_colors[3];
uint8_t scan[3] = {static_cast<uint8_t>(src_b),
static_cast<uint8_t>(src_g),
static_cast<uint8_t>(src_r)};
uint8_t dest_scan_o[3];
ReverseCopy3Bytes(dest_scan_o, dest_scan);
RGB_Blend(blend_type, scan, dest_scan_o, blended_colors);
dest_scan[2] =
FXDIB_ALPHA_MERGE(dest_scan[2], blended_colors[0], alpha_ratio);
dest_scan[1] =
FXDIB_ALPHA_MERGE(dest_scan[1], blended_colors[1], alpha_ratio);
dest_scan[0] =
FXDIB_ALPHA_MERGE(dest_scan[0], blended_colors[2], alpha_ratio);
} else if (blend_type != BlendMode::kNormal) {
int blended = Blend(blend_type, dest_scan[2], src_b);
blended = FXDIB_ALPHA_MERGE(src_b, blended, back_alpha);
dest_scan[2] = FXDIB_ALPHA_MERGE(dest_scan[2], blended, alpha_ratio);
blended = Blend(blend_type, dest_scan[1], src_g);
blended = FXDIB_ALPHA_MERGE(src_g, blended, back_alpha);
dest_scan[1] = FXDIB_ALPHA_MERGE(dest_scan[1], blended, alpha_ratio);
blended = Blend(blend_type, dest_scan[0], src_r);
blended = FXDIB_ALPHA_MERGE(src_r, blended, back_alpha);
dest_scan[0] = FXDIB_ALPHA_MERGE(dest_scan[0], blended, alpha_ratio);
} else {
dest_scan[2] = FXDIB_ALPHA_MERGE(dest_scan[2], src_b, alpha_ratio);
dest_scan[1] = FXDIB_ALPHA_MERGE(dest_scan[1], src_g, alpha_ratio);
dest_scan[0] = FXDIB_ALPHA_MERGE(dest_scan[0], src_r, alpha_ratio);
}
dest_scan += 4;
}
}
void CompositeRow_ByteMask2Rgb_RgbByteOrder(
pdfium::span<uint8_t> dest_span,
pdfium::span<const uint8_t> src_span,
int mask_alpha,
int src_r,
int src_g,
int src_b,
int pixel_count,
BlendMode blend_type,
int Bpp,
pdfium::span<const uint8_t> clip_span) {
uint8_t* dest_scan = dest_span.data();
const uint8_t* src_scan = src_span.data();
const uint8_t* clip_scan = clip_span.data();
for (int col = 0; col < pixel_count; col++) {
int src_alpha = GetAlphaWithSrc(mask_alpha, clip_scan, src_scan, col);
if (src_alpha == 0) {
dest_scan += Bpp;
continue;
}
if (IsNonSeparableBlendMode(blend_type)) {
int blended_colors[3];
uint8_t scan[3] = {static_cast<uint8_t>(src_b),
static_cast<uint8_t>(src_g),
static_cast<uint8_t>(src_r)};
uint8_t dest_scan_o[3];
ReverseCopy3Bytes(dest_scan_o, dest_scan);
RGB_Blend(blend_type, scan, dest_scan_o, blended_colors);
dest_scan[2] =
FXDIB_ALPHA_MERGE(dest_scan[2], blended_colors[0], src_alpha);
dest_scan[1] =
FXDIB_ALPHA_MERGE(dest_scan[1], blended_colors[1], src_alpha);
dest_scan[0] =
FXDIB_ALPHA_MERGE(dest_scan[0], blended_colors[2], src_alpha);
} else if (blend_type != BlendMode::kNormal) {
int blended = Blend(blend_type, dest_scan[2], src_b);
dest_scan[2] = FXDIB_ALPHA_MERGE(dest_scan[2], blended, src_alpha);
blended = Blend(blend_type, dest_scan[1], src_g);
dest_scan[1] = FXDIB_ALPHA_MERGE(dest_scan[1], blended, src_alpha);
blended = Blend(blend_type, dest_scan[0], src_r);
dest_scan[0] = FXDIB_ALPHA_MERGE(dest_scan[0], blended, src_alpha);
} else {
dest_scan[2] = FXDIB_ALPHA_MERGE(dest_scan[2], src_b, src_alpha);
dest_scan[1] = FXDIB_ALPHA_MERGE(dest_scan[1], src_g, src_alpha);
dest_scan[0] = FXDIB_ALPHA_MERGE(dest_scan[0], src_r, src_alpha);
}
dest_scan += Bpp;
}
}
void CompositeRow_BitMask2Argb_RgbByteOrder(
pdfium::span<uint8_t> dest_span,
pdfium::span<const uint8_t> src_span,
int mask_alpha,
int src_r,
int src_g,
int src_b,
int src_left,
int pixel_count,
BlendMode blend_type,
pdfium::span<const uint8_t> clip_span) {
uint8_t* dest_scan = dest_span.data();
const uint8_t* src_scan = src_span.data();
const uint8_t* clip_scan = clip_span.data();
if (blend_type == BlendMode::kNormal && !clip_scan && mask_alpha == 255) {
FX_ARGB argb = ArgbEncode(0xff, src_r, src_g, src_b);
for (int col = 0; col < pixel_count; col++) {
if (src_scan[(src_left + col) / 8] & (1 << (7 - (src_left + col) % 8))) {
FXARGB_SETRGBORDERDIB(dest_scan, argb);
}
dest_scan += 4;
}
return;
}
for (int col = 0; col < pixel_count; col++) {
if (!(src_scan[(src_left + col) / 8] & (1 << (7 - (src_left + col) % 8)))) {
dest_scan += 4;
continue;
}
int src_alpha = GetAlpha(mask_alpha, clip_scan, col);
uint8_t back_alpha = dest_scan[3];
if (back_alpha == 0) {
FXARGB_SETRGBORDERDIB(dest_scan,
ArgbEncode(src_alpha, src_r, src_g, src_b));
dest_scan += 4;
continue;
}
uint8_t dest_alpha = back_alpha + src_alpha - back_alpha * src_alpha / 255;
dest_scan[3] = dest_alpha;
int alpha_ratio = src_alpha * 255 / dest_alpha;
if (IsNonSeparableBlendMode(blend_type)) {
int blended_colors[3];
uint8_t scan[3] = {static_cast<uint8_t>(src_b),
static_cast<uint8_t>(src_g),
static_cast<uint8_t>(src_r)};
uint8_t dest_scan_o[3];
ReverseCopy3Bytes(dest_scan_o, dest_scan);
RGB_Blend(blend_type, scan, dest_scan_o, blended_colors);
dest_scan[2] =
FXDIB_ALPHA_MERGE(dest_scan[2], blended_colors[0], alpha_ratio);
dest_scan[1] =
FXDIB_ALPHA_MERGE(dest_scan[1], blended_colors[1], alpha_ratio);
dest_scan[0] =
FXDIB_ALPHA_MERGE(dest_scan[0], blended_colors[2], alpha_ratio);
} else if (blend_type != BlendMode::kNormal) {
int blended = Blend(blend_type, dest_scan[2], src_b);
blended = FXDIB_ALPHA_MERGE(src_b, blended, back_alpha);
dest_scan[2] = FXDIB_ALPHA_MERGE(dest_scan[2], blended, alpha_ratio);
blended = Blend(blend_type, dest_scan[1], src_g);
blended = FXDIB_ALPHA_MERGE(src_g, blended, back_alpha);
dest_scan[1] = FXDIB_ALPHA_MERGE(dest_scan[1], blended, alpha_ratio);
blended = Blend(blend_type, dest_scan[0], src_r);
blended = FXDIB_ALPHA_MERGE(src_r, blended, back_alpha);
dest_scan[0] = FXDIB_ALPHA_MERGE(dest_scan[0], blended, alpha_ratio);
} else {
dest_scan[2] = FXDIB_ALPHA_MERGE(dest_scan[2], src_b, alpha_ratio);
dest_scan[1] = FXDIB_ALPHA_MERGE(dest_scan[1], src_g, alpha_ratio);
dest_scan[0] = FXDIB_ALPHA_MERGE(dest_scan[0], src_r, alpha_ratio);
}
dest_scan += 4;
}
}
void CompositeRow_BitMask2Rgb_RgbByteOrder(
pdfium::span<uint8_t> dest_span,
pdfium::span<const uint8_t> src_span,
int mask_alpha,
int src_r,
int src_g,
int src_b,
int src_left,
int pixel_count,
BlendMode blend_type,
int Bpp,
pdfium::span<const uint8_t> clip_span) {
uint8_t* dest_scan = dest_span.data();
const uint8_t* src_scan = src_span.data();
const uint8_t* clip_scan = clip_span.data();
if (blend_type == BlendMode::kNormal && !clip_scan && mask_alpha == 255) {
for (int col = 0; col < pixel_count; col++) {
if (src_scan[(src_left + col) / 8] & (1 << (7 - (src_left + col) % 8))) {
dest_scan[2] = src_b;
dest_scan[1] = src_g;
dest_scan[0] = src_r;
}
dest_scan += Bpp;
}
return;
}
for (int col = 0; col < pixel_count; col++) {
if (!(src_scan[(src_left + col) / 8] & (1 << (7 - (src_left + col) % 8)))) {
dest_scan += Bpp;
continue;
}
int src_alpha = GetAlpha(mask_alpha, clip_scan, col);
if (src_alpha == 0) {
dest_scan += Bpp;
continue;
}
if (IsNonSeparableBlendMode(blend_type)) {
int blended_colors[3];
uint8_t scan[3] = {static_cast<uint8_t>(src_b),
static_cast<uint8_t>(src_g),
static_cast<uint8_t>(src_r)};
uint8_t dest_scan_o[3];
ReverseCopy3Bytes(dest_scan_o, dest_scan);
RGB_Blend(blend_type, scan, dest_scan_o, blended_colors);
dest_scan[2] =
FXDIB_ALPHA_MERGE(dest_scan[2], blended_colors[0], src_alpha);
dest_scan[1] =
FXDIB_ALPHA_MERGE(dest_scan[1], blended_colors[1], src_alpha);
dest_scan[0] =
FXDIB_ALPHA_MERGE(dest_scan[0], blended_colors[2], src_alpha);
} else if (blend_type != BlendMode::kNormal) {
int back_color = dest_scan[2];
int blended = Blend(blend_type, back_color, src_b);
dest_scan[2] = FXDIB_ALPHA_MERGE(back_color, blended, src_alpha);
back_color = dest_scan[1];
blended = Blend(blend_type, back_color, src_g);
dest_scan[1] = FXDIB_ALPHA_MERGE(back_color, blended, src_alpha);
back_color = dest_scan[0];
blended = Blend(blend_type, back_color, src_r);
dest_scan[0] = FXDIB_ALPHA_MERGE(back_color, blended, src_alpha);
} else {
dest_scan[2] = FXDIB_ALPHA_MERGE(dest_scan[2], src_b, src_alpha);
dest_scan[1] = FXDIB_ALPHA_MERGE(dest_scan[1], src_g, src_alpha);
dest_scan[0] = FXDIB_ALPHA_MERGE(dest_scan[0], src_r, src_alpha);
}
dest_scan += Bpp;
}
}
} // namespace
CFX_ScanlineCompositor::CFX_ScanlineCompositor() = default;
CFX_ScanlineCompositor::~CFX_ScanlineCompositor() = default;
bool CFX_ScanlineCompositor::Init(FXDIB_Format dest_format,
FXDIB_Format src_format,
pdfium::span<const uint32_t> src_palette,
uint32_t mask_color,
BlendMode blend_type,
bool bClip,
bool bRgbByteOrder) {
m_SrcFormat = src_format;
m_DestFormat = dest_format;
m_BlendType = blend_type;
m_bRgbByteOrder = bRgbByteOrder;
m_bClip = bClip;
if (m_DestFormat == FXDIB_Format::k1bppMask ||
m_DestFormat == FXDIB_Format::k1bppRgb) {
return false;
}
if (m_bRgbByteOrder && (m_DestFormat == FXDIB_Format::k8bppMask ||
m_DestFormat == FXDIB_Format::k8bppRgb)) {
return false;
}
if (m_SrcFormat == FXDIB_Format::k1bppMask ||
m_SrcFormat == FXDIB_Format::k8bppMask) {
InitSourceMask(mask_color);
return true;
}
if ((m_SrcFormat == FXDIB_Format::k1bppRgb ||
m_SrcFormat == FXDIB_Format::k8bppRgb) &&
m_DestFormat != FXDIB_Format::k8bppMask) {
InitSourcePalette(src_palette);
}
return true;
}
void CFX_ScanlineCompositor::InitSourceMask(uint32_t mask_color) {
m_MaskAlpha = FXARGB_A(mask_color);
m_MaskRed = FXARGB_R(mask_color);
m_MaskGreen = FXARGB_G(mask_color);
m_MaskBlue = FXARGB_B(mask_color);
if (m_DestFormat == FXDIB_Format::k8bppMask)
return;
if (m_DestFormat == FXDIB_Format::k8bppRgb)
m_MaskRed = FXRGB2GRAY(m_MaskRed, m_MaskGreen, m_MaskBlue);
}
void CFX_ScanlineCompositor::InitSourcePalette(
pdfium::span<const uint32_t> src_palette) {
DCHECK_NE(m_DestFormat, FXDIB_Format::k8bppMask);
m_SrcPalette.Reset();
const bool bIsDestBpp8 = m_DestFormat == FXDIB_Format::k8bppRgb;
const size_t pal_count = static_cast<size_t>(1)
<< GetBppFromFormat(m_SrcFormat);
if (!src_palette.empty()) {
if (bIsDestBpp8) {
pdfium::span<uint8_t> gray_pal = m_SrcPalette.Make8BitPalette(pal_count);
for (size_t i = 0; i < pal_count; ++i) {
FX_ARGB argb = src_palette[i];
gray_pal[i] =
FXRGB2GRAY(FXARGB_R(argb), FXARGB_G(argb), FXARGB_B(argb));
}
return;
}
pdfium::span<uint32_t> pPalette = m_SrcPalette.Make32BitPalette(pal_count);
for (size_t i = 0; i < pal_count; ++i)
pPalette[i] = src_palette[i];
return;
}
if (bIsDestBpp8) {
pdfium::span<uint8_t> gray_pal = m_SrcPalette.Make8BitPalette(pal_count);
if (pal_count == 2) {
gray_pal[0] = 0;
gray_pal[1] = 255;
} else {
for (size_t i = 0; i < pal_count; ++i)
gray_pal[i] = i;
}
return;
}
pdfium::span<uint32_t> pPalette = m_SrcPalette.Make32BitPalette(pal_count);
if (pal_count == 2) {
pPalette[0] = 0xff000000;
pPalette[1] = 0xffffffff;
} else {
for (size_t i = 0; i < pal_count; ++i) {
uint32_t v = static_cast<uint32_t>(i);
pPalette[i] = ArgbEncode(0, v, v, v);
}
}
}
void CFX_ScanlineCompositor::CompositeRgbBitmapLine(
pdfium::span<uint8_t> dest_scan,
pdfium::span<const uint8_t> src_scan,
int width,
pdfium::span<const uint8_t> clip_scan) const {
DCHECK(m_SrcFormat == FXDIB_Format::kRgb ||
m_SrcFormat == FXDIB_Format::kRgb32 ||
m_SrcFormat == FXDIB_Format::kArgb);
int src_Bpp = GetCompsFromFormat(m_SrcFormat);
int dest_Bpp = GetCompsFromFormat(m_DestFormat);
if (m_bRgbByteOrder) {
if (m_SrcFormat == FXDIB_Format::kArgb) {
if (m_DestFormat == FXDIB_Format::kArgb) {
CompositeRow_Argb2Argb_RgbByteOrder(dest_scan, src_scan, width,
m_BlendType, clip_scan);
return;
}
if (m_BlendType == BlendMode::kNormal) {
CompositeRow_Argb2Rgb_NoBlend_RgbByteOrder(dest_scan, src_scan, width,
dest_Bpp, clip_scan);
return;
}
CompositeRow_Argb2Rgb_Blend_RgbByteOrder(
dest_scan, src_scan, width, m_BlendType, dest_Bpp, clip_scan);
return;
}
if (m_DestFormat == FXDIB_Format::kArgb) {
if (m_BlendType == BlendMode::kNormal) {
if (m_bClip) {
CompositeRow_Rgb2Argb_NoBlend_Clip_RgbByteOrder(
dest_scan, src_scan, width, src_Bpp, clip_scan);
return;
}
CompositeRow_Rgb2Argb_NoBlend_NoClip_RgbByteOrder(dest_scan, src_scan,
width, src_Bpp);
return;
}
if (m_bClip) {
CompositeRow_Rgb2Argb_Blend_Clip_RgbByteOrder(
dest_scan, src_scan, width, m_BlendType, src_Bpp, clip_scan);
return;
}
CompositeRow_Rgb2Argb_Blend_NoClip_RgbByteOrder(
dest_scan, src_scan, width, m_BlendType, src_Bpp);
return;
}
if (m_BlendType == BlendMode::kNormal) {
if (m_bClip) {
CompositeRow_Rgb2Rgb_NoBlend_Clip_RgbByteOrder(
dest_scan, src_scan, width, dest_Bpp, src_Bpp, clip_scan);
return;
}
CompositeRow_Rgb2Rgb_NoBlend_NoClip_RgbByteOrder(
dest_scan, src_scan, width, dest_Bpp, src_Bpp);
return;
}
if (m_bClip) {
CompositeRow_Rgb2Rgb_Blend_Clip_RgbByteOrder(dest_scan, src_scan, width,
m_BlendType, dest_Bpp,
src_Bpp, clip_scan);
return;
}
CompositeRow_Rgb2Rgb_Blend_NoClip_RgbByteOrder(
dest_scan, src_scan, width, m_BlendType, dest_Bpp, src_Bpp);
return;
}
if (m_DestFormat == FXDIB_Format::k8bppMask) {
if (m_SrcFormat == FXDIB_Format::kArgb) {
CompositeRow_AlphaToMask(dest_scan, src_scan, width, clip_scan, 4);
} else {
CompositeRow_Rgb2Mask(dest_scan, width, clip_scan);
}
return;
}
if (m_DestFormat == FXDIB_Format::k8bppRgb) {
if (m_SrcFormat == FXDIB_Format::kArgb) {
CompositeRow_Argb2Gray(dest_scan, src_scan, width, m_BlendType,
clip_scan);
} else {
CompositeRow_Rgb2Gray(dest_scan, src_scan, src_Bpp, width, m_BlendType,
clip_scan);
}
return;
}
// TODO(thestig): Tighten this check.
DCHECK_NE(GetBppFromFormat(m_DestFormat), 8);
if (m_SrcFormat == FXDIB_Format::kArgb) {
if (m_DestFormat == FXDIB_Format::kArgb) {
CompositeRow_Argb2Argb(dest_scan, src_scan, width, m_BlendType,
clip_scan);
return;
}
if (m_BlendType == BlendMode::kNormal) {
CompositeRow_Argb2Rgb_NoBlend(dest_scan, src_scan, width, dest_Bpp,
clip_scan);
return;
}
CompositeRow_Argb2Rgb_Blend(dest_scan, src_scan, width, m_BlendType,
dest_Bpp, clip_scan);
return;
}
if (m_DestFormat == FXDIB_Format::kArgb) {
if (m_BlendType == BlendMode::kNormal) {
if (m_bClip) {
CompositeRow_Rgb2Argb_NoBlend_Clip(dest_scan, src_scan, width, src_Bpp,
clip_scan);
return;
}
CompositeRow_Rgb2Argb_NoBlend_NoClip(dest_scan, src_scan, width, src_Bpp);
return;
}
if (m_bClip) {
CompositeRow_Rgb2Argb_Blend_Clip(dest_scan, src_scan, width, m_BlendType,
src_Bpp, clip_scan);
return;
}
CompositeRow_Rgb2Argb_Blend_NoClip(dest_scan, src_scan, width, m_BlendType,
src_Bpp);
return;
}
if (m_BlendType == BlendMode::kNormal) {
if (m_bClip) {
CompositeRow_Rgb2Rgb_NoBlend_Clip(dest_scan, src_scan, width, dest_Bpp,
src_Bpp, clip_scan);
return;
}
CompositeRow_Rgb2Rgb_NoBlend_NoClip(dest_scan, src_scan, width, dest_Bpp,
src_Bpp);
return;
}
if (m_bClip) {
CompositeRow_Rgb2Rgb_Blend_Clip(dest_scan, src_scan, width, m_BlendType,
dest_Bpp, src_Bpp, clip_scan);
return;
}
CompositeRow_Rgb2Rgb_Blend_NoClip(dest_scan, src_scan, width, m_BlendType,
dest_Bpp, src_Bpp);
}
void CFX_ScanlineCompositor::CompositePalBitmapLine(
pdfium::span<uint8_t> dest_scan,
pdfium::span<const uint8_t> src_scan,
int src_left,
int width,
pdfium::span<const uint8_t> clip_scan) const {
DCHECK(m_SrcFormat == FXDIB_Format::k1bppRgb ||
m_SrcFormat == FXDIB_Format::k8bppRgb);
if (m_bRgbByteOrder) {
if (m_SrcFormat == FXDIB_Format::k1bppRgb) {
if (m_DestFormat == FXDIB_Format::k8bppRgb) {
return;
}
if (m_DestFormat == FXDIB_Format::kArgb) {
CompositeRow_1bppRgb2Argb_NoBlend_RgbByteOrder(
dest_scan, src_scan, src_left, width,
m_SrcPalette.Get32BitPalette(), clip_scan);
} else {
CompositeRow_1bppRgb2Rgb_NoBlend_RgbByteOrder(
dest_scan, src_scan, src_left, m_SrcPalette.Get32BitPalette(),
width, GetCompsFromFormat(m_DestFormat), clip_scan);
}
} else {
if (m_DestFormat == FXDIB_Format::k8bppRgb) {
return;
}
if (m_DestFormat == FXDIB_Format::kArgb) {
CompositeRow_8bppRgb2Argb_NoBlend_RgbByteOrder(
dest_scan, src_scan, width, m_SrcPalette.Get32BitPalette().data(),
clip_scan);
} else {
CompositeRow_8bppRgb2Rgb_NoBlend_RgbByteOrder(
dest_scan, src_scan, m_SrcPalette.Get32BitPalette().data(), width,
GetCompsFromFormat(m_DestFormat), clip_scan);
}
}
return;
}
if (m_DestFormat == FXDIB_Format::k8bppMask) {
CompositeRow_Rgb2Mask(dest_scan, width, clip_scan);
return;
}
if (m_DestFormat == FXDIB_Format::k8bppRgb) {
if (m_SrcFormat == FXDIB_Format::k1bppRgb) {
CompositeRow_1bppPal2Gray(dest_scan, src_scan, src_left,
m_SrcPalette.Get8BitPalette(), width,
m_BlendType, clip_scan);
return;
}
CompositeRow_8bppPal2Gray(dest_scan, src_scan,
m_SrcPalette.Get8BitPalette(), width, m_BlendType,
clip_scan);
return;
}
// TODO(thestig): Tighten this check.
DCHECK_NE(GetBppFromFormat(m_DestFormat), 8);
if (m_DestFormat == FXDIB_Format::kArgb) {
if (m_SrcFormat == FXDIB_Format::k1bppRgb) {
CompositeRow_1bppRgb2Argb_NoBlend(dest_scan, src_scan, src_left, width,
m_SrcPalette.Get32BitPalette(),
clip_scan);
return;
}
CompositeRow_8bppRgb2Argb_NoBlend(
dest_scan, src_scan, width, m_SrcPalette.Get32BitPalette(), clip_scan);
return;
}
if (m_SrcFormat == FXDIB_Format::k8bppRgb) {
CompositeRow_8bppRgb2Rgb_NoBlend(
dest_scan, src_scan, m_SrcPalette.Get32BitPalette(), width,
GetCompsFromFormat(m_DestFormat), clip_scan);
return;
}
CompositeRow_1bppRgb2Rgb_NoBlend(dest_scan, src_scan, src_left,
m_SrcPalette.Get32BitPalette(), width,
GetCompsFromFormat(m_DestFormat), clip_scan);
}
void CFX_ScanlineCompositor::CompositeByteMaskLine(
pdfium::span<uint8_t> dest_scan,
pdfium::span<const uint8_t> src_scan,
int width,
pdfium::span<const uint8_t> clip_scan) const {
if (m_DestFormat == FXDIB_Format::k8bppMask) {
CompositeRow_ByteMask2Mask(dest_scan, src_scan, m_MaskAlpha, width,
clip_scan);
return;
}
if (m_DestFormat == FXDIB_Format::k8bppRgb) {
CompositeRow_ByteMask2Gray(dest_scan, src_scan, m_MaskAlpha, m_MaskRed,
width, clip_scan);
return;
}
// TODO(thestig): Tighten this check.
DCHECK_NE(GetBppFromFormat(m_DestFormat), 8);
if (m_bRgbByteOrder) {
if (m_DestFormat == FXDIB_Format::kArgb)