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author | Nicolas Pena <npm@chromium.org> | 2017-03-23 15:02:28 -0400 |
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committer | Chromium commit bot <commit-bot@chromium.org> | 2017-03-23 19:44:05 +0000 |
commit | cd933f8633e95e1a6e6a885d30447835ca664f69 (patch) | |
tree | 8b59287298a83eaefabf46b8da6213fa2db08713 /core/fxge/dib/fx_dib_composite.cpp | |
parent | 3c4f2a1227f154100ead9f3b6f9fb69a0ba16feb (diff) | |
download | pdfium-cd933f8633e95e1a6e6a885d30447835ca664f69.tar.xz |
Cleanup fx_dib_composite part 5
Simplify CompositeRow_Argb2Argb method.
Change-Id: I8febf50375d5a0a56ba0eb77e921a506a6e327de
Reviewed-on: https://pdfium-review.googlesource.com/3161
Commit-Queue: Nicolás Peña <npm@chromium.org>
Reviewed-by: dsinclair <dsinclair@chromium.org>
Diffstat (limited to 'core/fxge/dib/fx_dib_composite.cpp')
-rw-r--r-- | core/fxge/dib/fx_dib_composite.cpp | 261 |
1 files changed, 59 insertions, 202 deletions
diff --git a/core/fxge/dib/fx_dib_composite.cpp b/core/fxge/dib/fx_dib_composite.cpp index 33e638216e..2dfb4fe0f2 100644 --- a/core/fxge/dib/fx_dib_composite.cpp +++ b/core/fxge/dib/fx_dib_composite.cpp @@ -389,219 +389,76 @@ void CompositeRow_Argb2Argb(uint8_t* dest_scan, uint8_t* dest_alpha_scan, const uint8_t* src_alpha_scan) { int blended_colors[3]; + uint8_t dest_offset = dest_alpha_scan ? 3 : 4; + uint8_t src_offset = src_alpha_scan ? 3 : 4; bool bNonseparableBlend = blend_type >= FXDIB_BLEND_NONSEPARABLE; - if (!dest_alpha_scan) { - if (!src_alpha_scan) { - uint8_t back_alpha = 0; - for (int col = 0; col < pixel_count; col++) { - back_alpha = dest_scan[3]; - if (back_alpha == 0) { - if (clip_scan) { - int src_alpha = clip_scan[col] * src_scan[3] / 255; - FXARGB_SETDIB(dest_scan, (FXARGB_GETDIB(src_scan) & 0xffffff) | - (src_alpha << 24)); - } else { - FXARGB_COPY(dest_scan, src_scan); - } - dest_scan += 4; - src_scan += 4; - continue; - } - uint8_t src_alpha; + bool has_src = !!src_alpha_scan; + bool has_dest = !!dest_alpha_scan; + for (int col = 0; col < pixel_count; col++) { + uint8_t back_alpha = has_dest ? *dest_alpha_scan : dest_scan[3]; + const uint8_t* alpha_source = has_src ? src_alpha_scan++ : &src_scan[3]; + uint8_t src_alpha = GetAlpha(*alpha_source, clip_scan, col); + if (back_alpha == 0) { + if (!has_dest && !has_src) { if (clip_scan) { - src_alpha = clip_scan[col] * src_scan[3] / 255; + FXARGB_SETDIB(dest_scan, (FXARGB_GETDIB(src_scan) & 0xffffff) | + (src_alpha << 24)); } else { - src_alpha = src_scan[3]; - } - 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) { - RGB_Blend(blend_type, src_scan, dest_scan, blended_colors); + FXARGB_COPY(dest_scan, src_scan); } - for (int color = 0; color < 3; color++) { - if (blend_type) { - 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++; + } else if (has_dest) { + *dest_alpha_scan = src_alpha; + for (int i = 0; i < 3; ++i) { + *dest_scan = *src_scan++; + ++dest_scan; } - dest_scan++; - src_scan++; + ++dest_alpha_scan; + if (!has_src) + ++src_scan; + } else { + FXARGB_SETDIB(dest_scan, FXARGB_MAKE((src_alpha << 24), src_scan[2], + src_scan[1], *src_scan)); } - } else { - 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_alpha_scan) / 255; - FXARGB_SETDIB(dest_scan, FXARGB_MAKE((src_alpha << 24), src_scan[2], - src_scan[1], *src_scan)); - } else { - FXARGB_SETDIB(dest_scan, - FXARGB_MAKE((*src_alpha_scan << 24), src_scan[2], - src_scan[1], *src_scan)); - } - dest_scan += 4; - src_scan += 3; - src_alpha_scan++; - continue; - } - uint8_t src_alpha; - if (clip_scan) { - src_alpha = clip_scan[col] * (*src_alpha_scan++) / 255; - } else { - src_alpha = *src_alpha_scan++; - } - if (src_alpha == 0) { - dest_scan += 4; - src_scan += 3; - 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) { - 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++; + if (!has_dest) { + dest_scan += dest_offset; + src_scan += src_offset; } + continue; } - } else { - if (src_alpha_scan) { - for (int col = 0; col < pixel_count; col++) { - uint8_t back_alpha = *dest_alpha_scan; - if (back_alpha == 0) { - if (clip_scan) { - int src_alpha = clip_scan[col] * (*src_alpha_scan) / 255; - *dest_alpha_scan = src_alpha; - *dest_scan++ = *src_scan++; - *dest_scan++ = *src_scan++; - *dest_scan++ = *src_scan++; - } else { - *dest_alpha_scan = *src_alpha_scan; - *dest_scan++ = *src_scan++; - *dest_scan++ = *src_scan++; - *dest_scan++ = *src_scan++; - } - dest_alpha_scan++; - src_alpha_scan++; - continue; - } - uint8_t src_alpha; - if (clip_scan) { - src_alpha = clip_scan[col] * (*src_alpha_scan++) / 255; - } else { - src_alpha = *src_alpha_scan++; - } - if (src_alpha == 0) { - dest_scan += 3; - src_scan += 3; - dest_alpha_scan++; - continue; - } - uint8_t dest_alpha = - back_alpha + src_alpha - back_alpha * src_alpha / 255; - *dest_alpha_scan++ = 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) { - 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++; - } - } + if (src_alpha == 0) { + dest_scan += dest_offset; + src_scan += src_offset; + if (has_dest) + ++dest_alpha_scan; + continue; + } + uint8_t dest_alpha = back_alpha + src_alpha - back_alpha * src_alpha / 255; + if (has_dest) { + *dest_alpha_scan = dest_alpha; + ++dest_alpha_scan; } else { - for (int col = 0; col < pixel_count; col++) { - uint8_t back_alpha = *dest_alpha_scan; - if (back_alpha == 0) { - if (clip_scan) { - int src_alpha = clip_scan[col] * src_scan[3] / 255; - *dest_alpha_scan = src_alpha; - *dest_scan++ = *src_scan++; - *dest_scan++ = *src_scan++; - *dest_scan++ = *src_scan++; - } else { - *dest_alpha_scan = src_scan[3]; - *dest_scan++ = *src_scan++; - *dest_scan++ = *src_scan++; - *dest_scan++ = *src_scan++; - } - dest_alpha_scan++; - src_scan++; - continue; - } - uint8_t src_alpha; - if (clip_scan) { - src_alpha = clip_scan[col] * src_scan[3] / 255; - } else { - src_alpha = src_scan[3]; - } - if (src_alpha == 0) { - dest_scan += 3; - src_scan += 4; - dest_alpha_scan++; - continue; - } - uint8_t dest_alpha = - back_alpha + src_alpha - back_alpha * src_alpha / 255; - *dest_alpha_scan++ = 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) { - 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++; - } - src_scan++; + 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) { + 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; } + if (!has_dest) + ++dest_scan; + if (!has_src) + ++src_scan; } } |