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e9b12aa9f7
It's not efficient to handle alpha premultiplying in every loader. The backend engine should be responsible for it. Now, we can remove duplicate code.
87 lines
No EOL
3 KiB
C
87 lines
No EOL
3 KiB
C
/*
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* Copyright (c) 2021 - 2023 the ThorVG project. All rights reserved.
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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* The above copyright notice and this permission notice shall be included in all
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* copies or substantial portions of the Software.
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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static void inline cRasterRGBA32(uint32_t *dst, uint32_t val, uint32_t offset, int32_t len)
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{
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dst += offset;
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while (len--) *dst++ = val;
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}
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static bool inline cRasterTranslucentRle(SwSurface* surface, const SwRleData* rle, uint32_t color)
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{
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auto span = rle->spans;
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uint32_t src;
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for (uint32_t i = 0; i < rle->size; ++i, ++span) {
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auto dst = &surface->buffer[span->y * surface->stride + span->x];
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if (span->coverage < 255) src = ALPHA_BLEND(color, span->coverage);
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else src = color;
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for (uint32_t x = 0; x < span->len; ++x, ++dst) {
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*dst = src + ALPHA_BLEND(*dst, _ialpha(src));
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}
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}
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return true;
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}
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static bool inline cRasterTranslucentRect(SwSurface* surface, const SwBBox& region, uint32_t color)
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{
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auto buffer = surface->buffer + (region.min.y * surface->stride) + region.min.x;
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auto h = static_cast<uint32_t>(region.max.y - region.min.y);
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auto w = static_cast<uint32_t>(region.max.x - region.min.x);
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auto ialpha = _ialpha(color);
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for (uint32_t y = 0; y < h; ++y) {
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auto dst = &buffer[y * surface->stride];
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for (uint32_t x = 0; x < w; ++x, ++dst) {
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*dst = color + ALPHA_BLEND(*dst, ialpha);
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}
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}
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return true;
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}
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static bool inline cRasterABGRtoARGB(Surface* surface)
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{
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TVGLOG("SW_ENGINE", "Convert ColorSpace ABGR - ARGB [Size: %d x %d]", surface->w, surface->h);
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auto buffer = surface->buffer;
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for (uint32_t y = 0; y < surface->h; ++y, buffer += surface->stride) {
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auto dst = buffer;
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for (uint32_t x = 0; x < surface->w; ++x, ++dst) {
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auto c = *dst;
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//flip Blue, Red channels
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*dst = (c & 0xff000000) + ((c & 0x00ff0000) >> 16) + (c & 0x0000ff00) + ((c & 0x000000ff) << 16);
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}
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}
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return true;
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}
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static bool inline cRasterARGBtoABGR(Surface* surface)
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{
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//exactly same with ABGRtoARGB
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return cRasterABGRtoARGB(surface);
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} |