git_clone/thorvg
1
0
Fork 0
mirror of https://github.com/thorvg/thorvg.git synced 2025-06-08 13:43:43 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions 5

sw_engine image: complete sequeqnce of the scaled rgba rle image drawing.

Browse source 
implement composition by translucent / opaque
This commit is contained in:
Hermet Park 2021-11-24 19:02:07 +09:00 • committed by Hermet Park
parent 43233a530a
commit 9fbb8d9b09
1 changed files with 60 additions and 16 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

78
src/lib/sw_engine/tvgSwRaster.cpp
View file

@ -599,7 +599,7 @@ static bool _transformedRleRGBAImage(SwSurface* surface, const SwImage* image, c
/* RLE Scaled RGBA Image */
/************************************************************************/
static bool _rasterScaledMaskedRleRGBAImage(SwSurface* surface, const SwImage* image, const Matrix* itransform, const SwBBox& region, uint32_t opacity, uint32_t halfScale, uint32_t (*blendMethod)(uint32_t))
static bool _rasterScaledMaskedTranslucentRleRGBAImage(SwSurface* surface, const SwImage* image, const Matrix* itransform, const SwBBox& region, uint32_t opacity, uint32_t halfScale, uint32_t (*blendMethod)(uint32_t))
{
auto span = image->rle->spans;
@ -611,7 +611,47 @@ static bool _rasterScaledMaskedRleRGBAImage(SwSurface* surface, const SwImage* i
auto dst = &surface->buffer[span->y * surface->stride + span->x];
auto cmp = &surface->compositor->image.data[span->y * surface->compositor->image.stride + span->x];
auto alpha = _multiplyAlpha(span->coverage, opacity);
if (alpha == 255) {
for (uint32_t x = span->x; x < ((uint32_t)span->x) + span->len; ++x, ++dst, ++cmp) {
auto sx = static_cast<uint32_t>(x * itransform->e11 + itransform->e13);
if (sx >= image->w) continue;
auto src = ALPHA_BLEND(_interpDownScaler(image->data, image->w, image->h, sx, sy, halfScale), alpha);
auto tmp = ALPHA_BLEND(src, blendMethod(*cmp));
*dst = tmp + ALPHA_BLEND(*dst, surface->blender.ialpha(tmp));
}
}
//Center (Up-Scaled)
} else {
for (uint32_t i = 0; i < image->rle->size; ++i, ++span) {
auto sy = static_cast<uint32_t>(span->y * itransform->e22 + itransform->e23);
if (sy >= image->h) continue;
auto dst = &surface->buffer[span->y * surface->stride + span->x];
auto cmp = &surface->compositor->image.data[span->y * surface->compositor->image.stride + span->x];
auto alpha = _multiplyAlpha(span->coverage, opacity);
for (uint32_t x = span->x; x < ((uint32_t)span->x) + span->len; ++x, ++dst, ++cmp) {
auto sx = static_cast<uint32_t>(x * itransform->e11 + itransform->e13);
if (sx >= image->w) continue;
auto src = ALPHA_BLEND(_interpUpScaler(image->data, image->w, image->h, sx, sy), alpha);
auto tmp = ALPHA_BLEND(src, blendMethod(*cmp));
*dst = tmp + ALPHA_BLEND(*dst, surface->blender.ialpha(tmp));
}
}
}
return true;
}
static bool _rasterScaledMaskedRleRGBAImage(SwSurface* surface, const SwImage* image, const Matrix* itransform, const SwBBox& region, uint32_t halfScale, uint32_t (*blendMethod)(uint32_t))
{
auto span = image->rle->spans;
//Center (Down-Scaled)
if (image->scale < DOWN_SCALE_TOLERANCE) {
for (uint32_t i = 0; i < image->rle->size; ++i, ++span) {
auto sy = static_cast<uint32_t>(span->y * itransform->e22 + itransform->e23);
if (sy >= image->h) continue;
auto dst = &surface->buffer[span->y * surface->stride + span->x];
auto cmp = &surface->compositor->image.data[span->y * surface->compositor->image.stride + span->x];
if (span->coverage == 255) {
for (uint32_t x = span->x; x < ((uint32_t)span->x) + span->len; ++x, ++dst, ++cmp) {
auto sx = static_cast<uint32_t>(x * itransform->e11 + itransform->e13);
if (sx >= image->w) continue;
@ -622,7 +662,7 @@ static bool _rasterScaledMaskedRleRGBAImage(SwSurface* surface, const SwImage* i
for (uint32_t x = span->x; x < ((uint32_t)span->x) + span->len; ++x, ++dst, ++cmp) {
auto sx = static_cast<uint32_t>(x * itransform->e11 + itransform->e13);
if (sx >= image->w) continue;
auto src = ALPHA_BLEND(_interpDownScaler(image->data, image->w, image->h, sx, sy, halfScale), alpha);
auto src = ALPHA_BLEND(_interpDownScaler(image->data, image->w, image->h, sx, sy, halfScale), span->coverage);
auto tmp = ALPHA_BLEND(src, blendMethod(*cmp));
*dst = tmp + ALPHA_BLEND(*dst, surface->blender.ialpha(tmp));
}
@ -635,8 +675,7 @@ static bool _rasterScaledMaskedRleRGBAImage(SwSurface* surface, const SwImage* i
if (sy >= image->h) continue;
auto dst = &surface->buffer[span->y * surface->stride + span->x];
auto cmp = &surface->compositor->image.data[span->y * surface->compositor->image.stride + span->x];
auto alpha = _multiplyAlpha(span->coverage, opacity);
if (alpha == 255) {
if (span->coverage == 255) {
for (uint32_t x = span->x; x < ((uint32_t)span->x) + span->len; ++x, ++dst, ++cmp) {
auto sx = static_cast<uint32_t>(x * itransform->e11 + itransform->e13);
if (sx >= image->w) continue;
@ -647,7 +686,7 @@ static bool _rasterScaledMaskedRleRGBAImage(SwSurface* surface, const SwImage* i
for (uint32_t x = span->x; x < ((uint32_t)span->x) + span->len; ++x, ++dst, ++cmp) {
auto sx = static_cast<uint32_t>(x * itransform->e11 + itransform->e13);
if (sx >= image->w) continue;
auto src = ALPHA_BLEND(_interpUpScaler(image->data, image->w, image->h, sx, sy), alpha);
auto src = ALPHA_BLEND(_interpUpScaler(image->data, image->w, image->h, sx, sy), span->coverage);
auto tmp = ALPHA_BLEND(src, blendMethod(*cmp));
*dst = tmp + ALPHA_BLEND(*dst, surface->blender.ialpha(tmp));
}
@ -750,26 +789,31 @@ static bool _rasterScaledRleRGBAImage(SwSurface* surface, const SwImage* image,
static bool _scaledRleRGBAImage(SwSurface* surface, const SwImage* image, const Matrix* transform, const SwBBox& region, uint32_t opacity)
{
auto halfScale = _halfScale(image->scale);
Matrix itransform;
if (transform && !mathInverse(transform, &itransform)) return false;
if (_translucent(surface, opacity)) {
//TODO: Blenders for the following scenarios: [Opacity / Composition / Opacity + Composition]
if (surface->compositor) {
auto halfScale = _halfScale(image->scale);
if (_compositing(surface)) {
if (opacity == 255) {
if (surface->compositor->method == CompositeMethod::AlphaMask) {
return _rasterScaledMaskedRleRGBAImage(surface, image, &itransform, region, opacity, halfScale, surface->blender.alpha);
return _rasterScaledMaskedRleRGBAImage(surface, image, &itransform, region, halfScale, surface->blender.alpha);
} else if (surface->compositor->method == CompositeMethod::InvAlphaMask) {
return _rasterScaledMaskedRleRGBAImage(surface, image, &itransform, region, opacity, halfScale, surface->blender.ialpha);
return _rasterScaledMaskedRleRGBAImage(surface, image, &itransform, region, halfScale, surface->blender.ialpha);
}
}
return _rasterScaledTranslucentRleRGBAImage(surface, image, &itransform, region, opacity, halfScale);
} else {
//TODO: Blenders for the following scenarios: [No Composition / Composition]
return _rasterScaledRleRGBAImage(surface, image, &itransform, region, opacity, halfScale);
if (surface->compositor->method == CompositeMethod::AlphaMask) {
return _rasterScaledMaskedTranslucentRleRGBAImage(surface, image, &itransform, region, opacity, halfScale, surface->blender.alpha);
} else if (surface->compositor->method == CompositeMethod::InvAlphaMask) {
return _rasterScaledMaskedTranslucentRleRGBAImage(surface, image, &itransform, region, opacity, halfScale, surface->blender.ialpha);
}
}
} else {
if (opacity == 255) return _rasterScaledRleRGBAImage(surface, image, &itransform, region, opacity, halfScale);
else return _rasterScaledTranslucentRleRGBAImage(surface, image, &itransform, region, opacity, halfScale);
}
return false;
}
/************************************************************************/