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 rgb image drawing.

Browse source 
implement composition by translucent / opaque.
This commit is contained in:
Hermet Park 2021-11-24 17:47:27 +09:00 • committed by Hermet Park
parent c0c37396f7
commit f0e7ef1dbc
1 changed files with 98 additions and 21 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

121
src/lib/sw_engine/tvgSwRaster.cpp
View file

@ -38,25 +38,25 @@ static inline uint32_t _multiplyAlpha(uint32_t c, uint32_t a)
}
static uint32_t _colorAlpha(uint32_t c)
static inline uint32_t _colorAlpha(uint32_t c)
{
return (c >> 24);
}
static uint32_t _colorInvAlpha(uint32_t c)
static inline uint32_t _colorInvAlpha(uint32_t c)
{
return (~c >> 24);
}
static uint32_t _abgrJoin(uint8_t r, uint8_t g, uint8_t b, uint8_t a)
static inline uint32_t _abgrJoin(uint8_t r, uint8_t g, uint8_t b, uint8_t a)
{
return (a << 24 | b << 16 | g << 8 | r);
}
static uint32_t _argbJoin(uint8_t r, uint8_t g, uint8_t b, uint8_t a)
static inline uint32_t _argbJoin(uint8_t r, uint8_t g, uint8_t b, uint8_t a)
{
return (a << 24 | r << 16 | g << 8 | b);
}
@ -70,14 +70,14 @@ static bool _translucent(const SwSurface* surface, uint8_t a)
}
static bool _compositing(const SwSurface* surface)
static inline bool _compositing(const SwSurface* surface)
{
if (!surface->compositor || surface->compositor->method == CompositeMethod::None) return false;
return true;
}
static uint32_t _halfScale(float scale)
static inline uint32_t _halfScale(float scale)
{
auto halfScale = static_cast<uint32_t>(0.5f / scale);
if (halfScale == 0) halfScale = 1;
@ -1168,7 +1168,8 @@ static bool _transformedRGBAImage(SwSurface* surface, const SwImage* image, cons
/*Scaled RGBA Image */
/************************************************************************/
static bool _rasterScaledMaskedRGBAImage(SwSurface* surface, const SwImage* image, const Matrix* itransform, const SwBBox& region, uint32_t opacity, uint32_t halfScale, uint32_t (*blendMethod)(uint32_t))
static bool _rasterScaledMaskedTranslucentRGBAImage(SwSurface* surface, const SwImage* image, const Matrix* itransform, const SwBBox& region, uint32_t opacity, uint32_t halfScale, uint32_t (*blendMethod)(uint32_t))
{
TVGLOG("SW_ENGINE", "Scaled Masked Image");
@ -1181,7 +1182,8 @@ static bool _rasterScaledMaskedRGBAImage(SwSurface* surface, const SwImage* imag
auto cmp = surface->compositor->image.data + (y * surface->stride + region.min.x);
auto img = image->data + static_cast<uint32_t>(y * itransform->e22 + itransform->e23) * image->stride;
for (auto x = region.min.x; x < region.max.x; ++x, ++dst, ++cmp) {
auto src = ALPHA_BLEND(img[static_cast<uint32_t>(x * itransform->e11 + itransform->e13)], _multiplyAlpha(opacity, blendMethod(*cmp)));
auto alpha = _multiplyAlpha(opacity, blendMethod(*cmp));
auto src = ALPHA_BLEND(img[static_cast<uint32_t>(x * itransform->e11 + itransform->e13)], alpha);
*dst = src + ALPHA_BLEND(*dst, surface->blender.ialpha(src));
}
}
@ -1194,7 +1196,77 @@ static bool _rasterScaledMaskedRGBAImage(SwSurface* surface, const SwImage* imag
auto cmp = surface->compositor->image.data + ((region.min.y + 1) * surface->stride + x);
auto img = image->data + static_cast<uint32_t>(x * itransform->e11 + itransform->e13);
for (auto y = region.min.y + 1; y < region.max.y - 1; ++y, dst += surface->stride, cmp += surface->stride) {
auto src = ALPHA_BLEND(img[static_cast<uint32_t>(y * itransform->e22 + itransform->e23) * image->stride], _multiplyAlpha(opacity, blendMethod(*cmp)));
auto alpha = _multiplyAlpha(opacity, blendMethod(*cmp));
auto src = ALPHA_BLEND(img[static_cast<uint32_t>(y * itransform->e22 + itransform->e23) * image->stride], alpha);
*dst = src + ALPHA_BLEND(*dst, surface->blender.ialpha(src));
}
}
//Center (Down-Scaled)
if (image->scale < DOWN_SCALE_TOLERANCE) {
auto dbuffer = surface->buffer + ((region.min.y + 1) * surface->stride + (region.min.x + 1));
auto cbuffer = surface->compositor->image.data + ((region.min.y + 1) * surface->stride + (region.min.x + 1));
for (auto y = region.min.y + 1; y < region.max.y - 1; ++y) {
auto dst = dbuffer;
auto cmp = cbuffer;
auto sy = static_cast<uint32_t>(y * itransform->e22 + itransform->e23);
for (auto x = region.min.x + 1; x < region.max.x - 1; ++x, ++dst, ++cmp) {
auto alpha = _multiplyAlpha(opacity, blendMethod(*cmp));
auto sx = static_cast<uint32_t>(x * itransform->e11 + itransform->e13);
auto src = ALPHA_BLEND(_interpDownScaler(image->data, image->w, image->h, sx, sy, halfScale), alpha);
*dst = src + ALPHA_BLEND(*dst, surface->blender.ialpha(src));
}
dbuffer += surface->stride;
cbuffer += surface->compositor->image.stride;
}
//Center (Up-Scaled)
} else {
auto dbuffer = surface->buffer + (region.min.y * surface->stride + region.min.x);
auto cbuffer = surface->compositor->image.data + (region.min.y * surface->stride + region.min.x);
for (auto y = region.min.y; y < region.max.y - 1; ++y) {
auto dst = dbuffer;
auto cmp = cbuffer;
auto sy = y * itransform->e22 + itransform->e23;
for (auto x = region.min.x; x < region.max.x - 1; ++x, ++dst, ++cmp) {
auto alpha = _multiplyAlpha(opacity, blendMethod(*cmp));
auto sx = x * itransform->e11 + itransform->e13;
auto src = ALPHA_BLEND(_interpUpScaler(image->data, image->w, image->h, sx, sy), alpha);
*dst = src + ALPHA_BLEND(*dst, surface->blender.ialpha(src));
}
dbuffer += surface->stride;
cbuffer += surface->compositor->image.stride;
}
}
return true;
}
static bool _rasterScaledMaskedRGBAImage(SwSurface* surface, const SwImage* image, const Matrix* itransform, const SwBBox& region, uint32_t halfScale, uint32_t (*blendMethod)(uint32_t))
{
TVGLOG("SW_ENGINE", "Scaled Masked Image");
//Top, Bottom Lines
SwCoord ys[2] = {region.min.y, region.max.y - 1};
for (auto i = 0; i < 2; ++i) {
auto y = ys[i];
auto dst = surface->buffer + (y * surface->stride + region.min.x);
auto cmp = surface->compositor->image.data + (y * surface->stride + region.min.x);
auto img = image->data + static_cast<uint32_t>(y * itransform->e22 + itransform->e23) * image->stride;
for (auto x = region.min.x; x < region.max.x; ++x, ++dst, ++cmp) {
auto src = ALPHA_BLEND(img[static_cast<uint32_t>(x * itransform->e11 + itransform->e13)], blendMethod(*cmp));
*dst = src + ALPHA_BLEND(*dst, surface->blender.ialpha(src));
}
}
//Left, Right Lines
SwCoord xs[2] = {region.min.x, region.max.x - 1};
for (auto i = 0; i < 2; ++i) {
auto x = xs[i];
auto dst = surface->buffer + ((region.min.y + 1) * surface->stride + x);
auto cmp = surface->compositor->image.data + ((region.min.y + 1) * surface->stride + x);
auto img = image->data + static_cast<uint32_t>(x * itransform->e11 + itransform->e13);
for (auto y = region.min.y + 1; y < region.max.y - 1; ++y, dst += surface->stride, cmp += surface->stride) {
auto src = ALPHA_BLEND(img[static_cast<uint32_t>(y * itransform->e22 + itransform->e23) * image->stride], blendMethod(*cmp));
*dst = src + ALPHA_BLEND(*dst, surface->blender.ialpha(src));
}
}
@ -1208,7 +1280,7 @@ static bool _rasterScaledMaskedRGBAImage(SwSurface* surface, const SwImage* imag
auto sy = static_cast<uint32_t>(y * itransform->e22 + itransform->e23);
for (auto x = region.min.x + 1; x < region.max.x - 1; ++x, ++dst, ++cmp) {
auto sx = static_cast<uint32_t>(x * itransform->e11 + itransform->e13);
auto src = ALPHA_BLEND(_interpDownScaler(image->data, image->w, image->h, sx, sy, halfScale), _multiplyAlpha(opacity, blendMethod(*cmp)));
auto src = ALPHA_BLEND(_interpDownScaler(image->data, image->w, image->h, sx, sy, halfScale), blendMethod(*cmp));
*dst = src + ALPHA_BLEND(*dst, surface->blender.ialpha(src));
}
dbuffer += surface->stride;
@ -1224,7 +1296,7 @@ static bool _rasterScaledMaskedRGBAImage(SwSurface* surface, const SwImage* imag
auto sy = y * itransform->e22 + itransform->e23;
for (auto x = region.min.x; x < region.max.x - 1; ++x, ++dst, ++cmp) {
auto sx = x * itransform->e11 + itransform->e13;
auto src = ALPHA_BLEND(_interpUpScaler(image->data, image->w, image->h, sx, sy), _multiplyAlpha(opacity, blendMethod(*cmp)));
auto src = ALPHA_BLEND(_interpUpScaler(image->data, image->w, image->h, sx, sy), blendMethod(*cmp));
*dst = src + ALPHA_BLEND(*dst, surface->blender.ialpha(src));
}
dbuffer += surface->stride;
@ -1347,25 +1419,30 @@ static bool _rasterScaledRGBAImage(SwSurface* surface, const SwImage* image, con
static bool _scaledRGBAImage(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 _rasterScaledMaskedRGBAImage(surface, image, &itransform, region, opacity, halfScale, surface->blender.alpha);
return _rasterScaledMaskedRGBAImage(surface, image, &itransform, region, halfScale, surface->blender.alpha);
} else if (surface->compositor->method == CompositeMethod::InvAlphaMask) {
return _rasterScaledMaskedRGBAImage(surface, image, &itransform, region, opacity, halfScale, surface->blender.ialpha);
return _rasterScaledMaskedRGBAImage(surface, image, &itransform, region, halfScale, surface->blender.ialpha);
}
}
return _rasterScaledTranslucentRGBAImage(surface, image, &itransform, region, opacity, halfScale);
} else {
//TODO: Blenders for the following scenarios: [No Composition / Composition]
return _rasterScaledRGBAImage(surface, image, &itransform, region, halfScale);
if (surface->compositor->method == CompositeMethod::AlphaMask) {
return _rasterScaledMaskedTranslucentRGBAImage(surface, image, &itransform, region, opacity, halfScale, surface->blender.alpha);
} else if (surface->compositor->method == CompositeMethod::InvAlphaMask) {
return _rasterScaledMaskedTranslucentRGBAImage(surface, image, &itransform, region, opacity, halfScale, surface->blender.ialpha);
}
}
} else {
if (opacity == 255) return _rasterScaledRGBAImage(surface, image, &itransform, region, halfScale);
else return _rasterScaledTranslucentRGBAImage(surface, image, &itransform, region, opacity, halfScale);
}
return false;
}