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thorvg/src/lib/sw_engine/tvgSwRaster.cpp
Mira Grudzinska 7b931b5e32 sw_engine: refactoring the linear gradient rle rastering function 
The translucent rastering function is split into 3 other (instead of if/else statement).
An additional function is introduced to decide which one of the 3 should be called.
This refactoring is done to preserve the convention used for all other rastering functs.
2021-05-25 13:00:59 +09:00

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/*
* Copyright (c) 2020-2021 Samsung Electronics Co., Ltd. All rights reserved.
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#include "tvgSwCommon.h"
#include "tvgRender.h"
#include <iostream>
#include <float.h>
#include <math.h>
/************************************************************************/
/* Internal Class Implementation */
/************************************************************************/
static uint32_t _colorAlpha(uint32_t c)
{
return (c >> 24);
}
static 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)
{
return (a << 24 | r << 16 | g << 8 | b);
}
static bool _inverse(const Matrix* transform, Matrix* invM)
{
// computes the inverse of a matrix m
auto det = transform->e11 * (transform->e22 * transform->e33 - transform->e32 * transform->e23) -
transform->e12 * (transform->e21 * transform->e33 - transform->e23 * transform->e31) +
transform->e13 * (transform->e21 * transform->e32 - transform->e22 * transform->e31);
if (fabsf(det) < FLT_EPSILON) return false;
auto invDet = 1 / det;
invM->e11 = (transform->e22 * transform->e33 - transform->e32 * transform->e23) * invDet;
invM->e12 = (transform->e13 * transform->e32 - transform->e12 * transform->e33) * invDet;
invM->e13 = (transform->e12 * transform->e23 - transform->e13 * transform->e22) * invDet;
invM->e21 = (transform->e23 * transform->e31 - transform->e21 * transform->e33) * invDet;
invM->e22 = (transform->e11 * transform->e33 - transform->e13 * transform->e31) * invDet;
invM->e23 = (transform->e21 * transform->e13 - transform->e11 * transform->e23) * invDet;
invM->e31 = (transform->e21 * transform->e32 - transform->e31 * transform->e22) * invDet;
invM->e32 = (transform->e31 * transform->e12 - transform->e11 * transform->e32) * invDet;
invM->e33 = (transform->e11 * transform->e22 - transform->e21 * transform->e12) * invDet;
return true;
}
static bool _identify(const Matrix* transform)
{
if (transform) {
if (transform->e11 != 1.0f || transform->e12 != 0.0f || transform->e13 != 0.0f ||
transform->e21 != 0.0f || transform->e22 != 1.0f || transform->e23 != 0.0f ||
transform->e31 != 0.0f || transform->e32 != 0.0f || transform->e33 != 1.0f) {
return false;
}
}
return true;
}
static bool _translucent(const SwSurface* surface, uint8_t a)
{
if (a < 255) return true;
if (!surface->compositor || surface->compositor->method == CompositeMethod::None) return false;
return true;
}
/************************************************************************/
/* Rect */
/************************************************************************/
static bool _translucentRect(SwSurface* surface, const SwBBox& region, uint32_t color)
{
auto buffer = surface->buffer + (region.min.y * surface->stride) + region.min.x;
auto h = static_cast<uint32_t>(region.max.y - region.min.y);
auto w = static_cast<uint32_t>(region.max.x - region.min.x);
auto ialpha = 255 - surface->blender.alpha(color);
for (uint32_t y = 0; y < h; ++y) {
auto dst = &buffer[y * surface->stride];
for (uint32_t x = 0; x < w; ++x) {
dst[x] = color + ALPHA_BLEND(dst[x], ialpha);
}
}
return true;
}
static bool _translucentRectAlphaMask(SwSurface* surface, const SwBBox& region, uint32_t color)
{
auto buffer = surface->buffer + (region.min.y * surface->stride) + region.min.x;
auto h = static_cast<uint32_t>(region.max.y - region.min.y);
auto w = static_cast<uint32_t>(region.max.x - region.min.x);
#ifdef THORVG_LOG_ENABLED
cout <<"SW_ENGINE: Rectangle Alpha Mask Composition" << endl;
#endif
auto cbuffer = surface->compositor->image.data + (region.min.y * surface->stride) + region.min.x; //compositor buffer
for (uint32_t y = 0; y < h; ++y) {
auto dst = &buffer[y * surface->stride];
auto cmp = &cbuffer[y * surface->stride];
for (uint32_t x = 0; x < w; ++x) {
auto tmp = ALPHA_BLEND(color, surface->blender.alpha(*cmp));
dst[x] = tmp + ALPHA_BLEND(dst[x], 255 - surface->blender.alpha(tmp));
++cmp;
}
}
return true;
}
static bool _translucentRectInvAlphaMask(SwSurface* surface, const SwBBox& region, uint32_t color)
{
auto buffer = surface->buffer + (region.min.y * surface->stride) + region.min.x;
auto h = static_cast<uint32_t>(region.max.y - region.min.y);
auto w = static_cast<uint32_t>(region.max.x - region.min.x);
#ifdef THORVG_LOG_ENABLED
cout <<"SW_ENGINE: Rectangle Inverse Alpha Mask Composition" << endl;
#endif
auto cbuffer = surface->compositor->image.data + (region.min.y * surface->stride) + region.min.x; //compositor buffer
for (uint32_t y = 0; y < h; ++y) {
auto dst = &buffer[y * surface->stride];
auto cmp = &cbuffer[y * surface->stride];
for (uint32_t x = 0; x < w; ++x) {
auto tmp = ALPHA_BLEND(color, 255 - surface->blender.alpha(*cmp));
dst[x] = tmp + ALPHA_BLEND(dst[x], 255 - surface->blender.alpha(tmp));
++cmp;
}
}
return true;
}
static bool _rasterTranslucentRect(SwSurface* surface, const SwBBox& region, uint32_t color)
{
if (surface->compositor) {
if (surface->compositor->method == CompositeMethod::AlphaMask) {
return _translucentRectAlphaMask(surface, region, color);
}
if (surface->compositor->method == CompositeMethod::InvAlphaMask) {
return _translucentRectInvAlphaMask(surface, region, color);
}
}
return _translucentRect(surface, region, color);
}
static bool _rasterSolidRect(SwSurface* surface, const SwBBox& region, uint32_t color)
{
auto buffer = surface->buffer + (region.min.y * surface->stride);
auto w = static_cast<uint32_t>(region.max.x - region.min.x);
auto h = static_cast<uint32_t>(region.max.y - region.min.y);
for (uint32_t y = 0; y < h; ++y) {
rasterRGBA32(buffer + y * surface->stride, color, region.min.x, w);
}
return true;
}
/************************************************************************/
/* Rle */
/************************************************************************/
static bool _translucentRle(SwSurface* surface, const SwRleData* rle, uint32_t color)
{
auto span = rle->spans;
uint32_t src;
for (uint32_t i = 0; i < rle->size; ++i) {
auto dst = &surface->buffer[span->y * surface->stride + span->x];
if (span->coverage < 255) src = ALPHA_BLEND(color, span->coverage);
else src = color;
auto ialpha = 255 - surface->blender.alpha(src);
for (uint32_t x = 0; x < span->len; ++x) {
dst[x] = src + ALPHA_BLEND(dst[x], ialpha);
}
++span;
}
return true;
}
static bool _translucentRleAlphaMask(SwSurface* surface, const SwRleData* rle, uint32_t color)
{
#ifdef THORVG_LOG_ENABLED
cout <<"SW_ENGINE: Rle Alpha Mask Composition" << endl;
#endif
auto span = rle->spans;
uint32_t src;
auto cbuffer = surface->compositor->image.data;
for (uint32_t i = 0; i < rle->size; ++i) {
auto dst = &surface->buffer[span->y * surface->stride + span->x];
auto cmp = &cbuffer[span->y * surface->stride + span->x];
if (span->coverage < 255) src = ALPHA_BLEND(color, span->coverage);
else src = color;
for (uint32_t x = 0; x < span->len; ++x) {
auto tmp = ALPHA_BLEND(src, surface->blender.alpha(*cmp));
dst[x] = tmp + ALPHA_BLEND(dst[x], 255 - surface->blender.alpha(tmp));
++cmp;
}
++span;
}
return true;
}
static bool _translucentRleInvAlphaMask(SwSurface* surface, SwRleData* rle, uint32_t color)
{
#ifdef THORVG_LOG_ENABLED
cout <<"SW_ENGINE: Rle Inverse Alpha Mask Composition" << endl;
#endif
auto span = rle->spans;
uint32_t src;
auto cbuffer = surface->compositor->image.data;
for (uint32_t i = 0; i < rle->size; ++i) {
auto dst = &surface->buffer[span->y * surface->stride + span->x];
auto cmp = &cbuffer[span->y * surface->stride + span->x];
if (span->coverage < 255) src = ALPHA_BLEND(color, span->coverage);
else src = color;
for (uint32_t x = 0; x < span->len; ++x) {
auto tmp = ALPHA_BLEND(src, 255 - surface->blender.alpha(*cmp));
dst[x] = tmp + ALPHA_BLEND(dst[x], 255 - surface->blender.alpha(tmp));
++cmp;
}
++span;
}
return true;
}
static bool _rasterTranslucentRle(SwSurface* surface, SwRleData* rle, uint32_t color)
{
if (!rle) return false;
if (surface->compositor) {
if (surface->compositor->method == CompositeMethod::AlphaMask) {
return _translucentRleAlphaMask(surface, rle, color);
}
if (surface->compositor->method == CompositeMethod::InvAlphaMask) {
return _translucentRleInvAlphaMask(surface, rle, color);
}
}
return _translucentRle(surface, rle, color);
}
static bool _rasterSolidRle(SwSurface* surface, const SwRleData* rle, uint32_t color)
{
if (!rle) return false;
auto span = rle->spans;
for (uint32_t i = 0; i < rle->size; ++i) {
if (span->coverage == 255) {
rasterRGBA32(surface->buffer + span->y * surface->stride, color, span->x, span->len);
} else {
auto dst = &surface->buffer[span->y * surface->stride + span->x];
auto src = ALPHA_BLEND(color, span->coverage);
auto ialpha = 255 - span->coverage;
for (uint32_t i = 0; i < span->len; ++i) {
dst[i] = src + ALPHA_BLEND(dst[i], ialpha);
}
}
++span;
}
return true;
}
/************************************************************************/
/* Image */
/************************************************************************/
static bool _rasterTranslucentImageRle(SwSurface* surface, const SwRleData* rle, uint32_t *img, uint32_t w, uint32_t h, uint32_t opacity)
{
auto span = rle->spans;
for (uint32_t i = 0; i < rle->size; ++i, ++span) {
auto dst = &surface->buffer[span->y * surface->stride + span->x];
auto src = img + span->x + span->y * w; //TODO: need to use image's stride
auto alpha = ALPHA_MULTIPLY(span->coverage, opacity);
for (uint32_t x = 0; x < span->len; ++x, ++dst, ++src) {
*src = ALPHA_BLEND(*src, alpha);
*dst = *src + ALPHA_BLEND(*dst, 255 - surface->blender.alpha(*src));
}
}
return true;
}
static bool _rasterTranslucentImageRle(SwSurface* surface, const SwRleData* rle, uint32_t *img, uint32_t w, uint32_t h, uint32_t opacity, const Matrix* invTransform)
{
auto span = rle->spans;
for (uint32_t i = 0; i < rle->size; ++i, ++span) {
auto ey1 = span->y * invTransform->e12 + invTransform->e13;
auto ey2 = span->y * invTransform->e22 + invTransform->e23;
auto dst = &surface->buffer[span->y * surface->stride + span->x];
auto alpha = ALPHA_MULTIPLY(span->coverage, opacity);
for (uint32_t x = 0; x < span->len; ++x, ++dst) {
auto rX = static_cast<uint32_t>(roundf((span->x + x) * invTransform->e11 + ey1));
auto rY = static_cast<uint32_t>(roundf((span->x + x) * invTransform->e21 + ey2));
if (rX >= w || rY >= h) continue;
auto src = ALPHA_BLEND(img[rY * w + rX], alpha); //TODO: need to use image's stride
*dst = src + ALPHA_BLEND(*dst, 255 - surface->blender.alpha(src));
}
}
return true;
}
static bool _rasterImageRle(SwSurface* surface, SwRleData* rle, uint32_t *img, uint32_t w, uint32_t h)
{
auto span = rle->spans;
for (uint32_t i = 0; i < rle->size; ++i, ++span) {
auto dst = &surface->buffer[span->y * surface->stride + span->x];
auto src = img + span->x + span->y * w; //TODO: need to use image's stride
for (uint32_t x = 0; x < span->len; ++x, ++dst, ++src) {
*src = ALPHA_BLEND(*src, span->coverage);
*dst = *src + ALPHA_BLEND(*dst, 255 - surface->blender.alpha(*src));
}
}
return true;
}
static bool _rasterImageRle(SwSurface* surface, SwRleData* rle, uint32_t *img, uint32_t w, uint32_t h, const Matrix* invTransform)
{
auto span = rle->spans;
for (uint32_t i = 0; i < rle->size; ++i, ++span) {
auto ey1 = span->y * invTransform->e12 + invTransform->e13;
auto ey2 = span->y * invTransform->e22 + invTransform->e23;
auto dst = &surface->buffer[span->y * surface->stride + span->x];
for (uint32_t x = 0; x < span->len; ++x, ++dst) {
auto rX = static_cast<uint32_t>(roundf((span->x + x) * invTransform->e11 + ey1));
auto rY = static_cast<uint32_t>(roundf((span->x + x) * invTransform->e21 + ey2));
if (rX >= w || rY >= h) continue;
auto src = ALPHA_BLEND(img[rY * w + rX], span->coverage); //TODO: need to use image's stride
*dst = src + ALPHA_BLEND(*dst, 255 - surface->blender.alpha(src));
}
}
return true;
}
static bool _translucentImage(SwSurface* surface, const uint32_t *img, uint32_t w, TVG_UNUSED uint32_t h, uint32_t opacity, const SwBBox& region, const Matrix* invTransform)
{
auto dbuffer = &surface->buffer[region.min.y * surface->stride + region.min.x];
for (auto y = region.min.y; y < region.max.y; ++y) {
auto dst = dbuffer;
auto ey1 = y * invTransform->e12 + invTransform->e13;
auto ey2 = y * invTransform->e22 + invTransform->e23;
for (auto x = region.min.x; x < region.max.x; ++x, ++dst) {
auto rX = static_cast<uint32_t>(roundf(x * invTransform->e11 + ey1));
auto rY = static_cast<uint32_t>(roundf(x * invTransform->e21 + ey2));
if (rX >= w || rY >= h) continue;
auto src = ALPHA_BLEND(img[rX + (rY * w)], opacity); //TODO: need to use image's stride
*dst = src + ALPHA_BLEND(*dst, 255 - surface->blender.alpha(src));
}
dbuffer += surface->stride;
}
return true;
}
static bool _translucentImageAlphaMask(SwSurface* surface, const uint32_t *img, uint32_t w, TVG_UNUSED uint32_t h, uint32_t opacity, const SwBBox& region, const Matrix* invTransform)
{
#ifdef THORVG_LOG_ENABLED
cout <<"SW_ENGINE: Transformed Image Alpha Mask Composition" << endl;
#endif
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; ++y) {
auto dst = dbuffer;
auto cmp = cbuffer;
float ey1 = y * invTransform->e12 + invTransform->e13;
float ey2 = y * invTransform->e22 + invTransform->e23;
for (auto x = region.min.x; x < region.max.x; ++x, ++dst, ++cmp) {
auto rX = static_cast<uint32_t>(roundf(x * invTransform->e11 + ey1));
auto rY = static_cast<uint32_t>(roundf(x * invTransform->e21 + ey2));
if (rX >= w || rY >= h) continue;
auto tmp = ALPHA_BLEND(img[rX + (rY * w)], ALPHA_MULTIPLY(opacity, surface->blender.alpha(*cmp))); //TODO: need to use image's stride
*dst = tmp + ALPHA_BLEND(*dst, 255 - surface->blender.alpha(tmp));
}
dbuffer += surface->stride;
cbuffer += surface->stride;
}
return true;
}
static bool _translucentImageInvAlphaMask(SwSurface* surface, const uint32_t *img, uint32_t w, uint32_t h, uint32_t opacity, const SwBBox& region, const Matrix* invTransform)
{
#ifdef THORVG_LOG_ENABLED
cout <<"SW_ENGINE: Transformed Image Inverse Alpha Mask Composition" << endl;
#endif
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; ++y) {
auto dst = dbuffer;
auto cmp = cbuffer;
float ey1 = y * invTransform->e12 + invTransform->e13;
float ey2 = y * invTransform->e22 + invTransform->e23;
for (auto x = region.min.x; x < region.max.x; ++x, ++dst, ++cmp) {
auto rX = static_cast<uint32_t>(roundf(x * invTransform->e11 + ey1));
auto rY = static_cast<uint32_t>(roundf(x * invTransform->e21 + ey2));
if (rX >= w || rY >= h) continue;
auto tmp = ALPHA_BLEND(img[rX + (rY * w)], ALPHA_MULTIPLY(opacity, 255 - surface->blender.alpha(*cmp))); //TODO: need to use image's stride
*dst = tmp + ALPHA_BLEND(*dst, 255 - surface->blender.alpha(tmp));
}
dbuffer += surface->stride;
cbuffer += surface->stride;
}
return true;
}
static bool _rasterTranslucentImage(SwSurface* surface, const uint32_t *img, uint32_t w, uint32_t h, uint32_t opacity, const SwBBox& region, const Matrix* invTransform)
{
if (surface->compositor) {
if (surface->compositor->method == CompositeMethod::AlphaMask) {
return _translucentImageAlphaMask(surface, img, w, h, opacity, region, invTransform);
}
if (surface->compositor->method == CompositeMethod::InvAlphaMask) {
return _translucentImageInvAlphaMask(surface, img, w, h, opacity, region, invTransform);
}
}
return _translucentImage(surface, img, w, h, opacity, region, invTransform);
}
static bool _translucentImage(SwSurface* surface, uint32_t *img, uint32_t w, uint32_t h, uint32_t opacity, const SwBBox& region)
{
auto dbuffer = &surface->buffer[region.min.y * surface->stride + region.min.x];
auto sbuffer = img + region.min.x + region.min.y * w; //TODO: need to use image's stride
for (auto y = region.min.y; y < region.max.y; ++y) {
auto dst = dbuffer;
auto src = sbuffer;
for (auto x = region.min.x; x < region.max.x; ++x, ++dst, ++src) {
auto p = ALPHA_BLEND(*src, opacity);
*dst = p + ALPHA_BLEND(*dst, 255 - surface->blender.alpha(p));
}
dbuffer += surface->stride;
sbuffer += w; //TODO: need to use image's stride
}
return true;
}
static bool _translucentImageAlphaMask(SwSurface* surface, uint32_t *img, uint32_t w, uint32_t h, uint32_t opacity, const SwBBox& region)
{
auto buffer = surface->buffer + (region.min.y * surface->stride) + region.min.x;
auto h2 = static_cast<uint32_t>(region.max.y - region.min.y);
auto w2 = static_cast<uint32_t>(region.max.x - region.min.x);
#ifdef THORVG_LOG_ENABLED
cout <<"SW_ENGINE: Image Alpha Mask Composition" << endl;
#endif
auto sbuffer = img + (region.min.y * w) + region.min.x;
auto cbuffer = surface->compositor->image.data + (region.min.y * surface->stride) + region.min.x; //compositor buffer
for (uint32_t y = 0; y < h2; ++y) {
auto dst = buffer;
auto cmp = cbuffer;
auto src = sbuffer;
for (uint32_t x = 0; x < w2; ++x, ++dst, ++src, ++cmp) {
auto tmp = ALPHA_BLEND(*src, ALPHA_MULTIPLY(opacity, surface->blender.alpha(*cmp)));
*dst = tmp + ALPHA_BLEND(*dst, 255 - surface->blender.alpha(tmp));
}
buffer += surface->stride;
cbuffer += surface->stride;
sbuffer += w; //TODO: need to use image's stride
}
return true;
}
static bool _translucentImageInvAlphaMask(SwSurface* surface, uint32_t *img, uint32_t w, uint32_t h, uint32_t opacity, const SwBBox& region)
{
auto buffer = surface->buffer + (region.min.y * surface->stride) + region.min.x;
auto h2 = static_cast<uint32_t>(region.max.y - region.min.y);
auto w2 = static_cast<uint32_t>(region.max.x - region.min.x);
#ifdef THORVG_LOG_ENABLED
cout <<"SW_ENGINE: Image Inverse Alpha Mask Composition" << endl;
#endif
auto sbuffer = img + (region.min.y * w) + region.min.x;
auto cbuffer = surface->compositor->image.data + (region.min.y * surface->stride) + region.min.x; //compositor buffer
for (uint32_t y = 0; y < h2; ++y) {
auto dst = buffer;
auto cmp = cbuffer;
auto src = sbuffer;
for (uint32_t x = 0; x < w2; ++x, ++dst, ++src, ++cmp) {
auto tmp = ALPHA_BLEND(*src, ALPHA_MULTIPLY(opacity, 255 - surface->blender.alpha(*cmp)));
*dst = tmp + ALPHA_BLEND(*dst, 255 - surface->blender.alpha(tmp));
}
buffer += surface->stride;
cbuffer += surface->stride;
sbuffer += w; //TODO: need to use image's stride
}
return true;
}
static bool _rasterTranslucentImage(SwSurface* surface, uint32_t *img, uint32_t w, uint32_t h, uint32_t opacity, const SwBBox& region)
{
if (surface->compositor) {
if (surface->compositor->method == CompositeMethod::AlphaMask) {
return _translucentImageAlphaMask(surface, img, w, h, opacity, region);
}
if (surface->compositor->method == CompositeMethod::InvAlphaMask) {
return _translucentImageInvAlphaMask(surface, img, w, h, opacity, region);
}
}
return _translucentImage(surface, img, w, h, opacity, region);
}
static bool _rasterImage(SwSurface* surface, uint32_t *img, uint32_t w, TVG_UNUSED uint32_t h, const SwBBox& region)
{
auto dbuffer = &surface->buffer[region.min.y * surface->stride + region.min.x];
auto sbuffer = img + region.min.x + region.min.y * w; //TODO: need to use image's stride
for (auto y = region.min.y; y < region.max.y; ++y) {
auto dst = dbuffer;
auto src = sbuffer;
for (auto x = region.min.x; x < region.max.x; x++, dst++, src++) {
*dst = *src + ALPHA_BLEND(*dst, 255 - surface->blender.alpha(*src));
}
dbuffer += surface->stride;
sbuffer += w; //TODO: need to use image's stride
}
return true;
}
static bool _rasterImage(SwSurface* surface, const uint32_t *img, uint32_t w, uint32_t h, const SwBBox& region, const Matrix* invTransform)
{
for (auto y = region.min.y; y < region.max.y; ++y) {
auto dst = &surface->buffer[y * surface->stride + region.min.x];
auto ey1 = y * invTransform->e12 + invTransform->e13;
auto ey2 = y * invTransform->e22 + invTransform->e23;
for (auto x = region.min.x; x < region.max.x; ++x, ++dst) {
auto rX = static_cast<uint32_t>(roundf(x * invTransform->e11 + ey1));
auto rY = static_cast<uint32_t>(roundf(x * invTransform->e21 + ey2));
if (rX >= w || rY >= h) continue;
auto src = img[rX + (rY * w)]; //TODO: need to use image's stride
*dst = src + ALPHA_BLEND(*dst, 255 - surface->blender.alpha(src));
}
}
return true;
}
/************************************************************************/
/* Gradient */
/************************************************************************/
static bool _rasterTranslucentLinearGradientRect(SwSurface* surface, const SwBBox& region, const SwFill* fill)
{
if (fill->linear.len < FLT_EPSILON) return false;
auto buffer = surface->buffer + (region.min.y * surface->stride) + region.min.x;
auto h = static_cast<uint32_t>(region.max.y - region.min.y);
auto w = static_cast<uint32_t>(region.max.x - region.min.x);
auto sbuffer = static_cast<uint32_t*>(alloca(w * sizeof(uint32_t)));
if (!sbuffer) return false;
if (surface->compositor) {
auto method = surface->compositor->method;
auto cbuffer = surface->compositor->image.data + (region.min.y * surface->stride) + region.min.x;
if (method == CompositeMethod::AlphaMask) {
for (uint32_t y = 0; y < h; ++y) {
fillFetchLinear(fill, sbuffer, region.min.y + y, region.min.x, w);
auto dst = buffer;
auto cmp = cbuffer;
auto src = sbuffer;
for (uint32_t x = 0; x < w; ++x, ++dst, ++cmp, ++src) {
auto tmp = ALPHA_BLEND(*src, surface->blender.alpha(*cmp));
*dst = tmp + ALPHA_BLEND(*dst, 255 - surface->blender.alpha(tmp));
}
buffer += surface->stride;
cbuffer += surface->stride;
}
return true;
} else if (method == CompositeMethod::InvAlphaMask) {
for (uint32_t y = 0; y < h; ++y) {
fillFetchLinear(fill, sbuffer, region.min.y + y, region.min.x, w);
auto dst = buffer;
auto cmp = cbuffer;
auto src = sbuffer;
for (uint32_t x = 0; x < w; ++x, ++dst, ++cmp, ++src) {
auto tmp = ALPHA_BLEND(*src, 255 - surface->blender.alpha(*cmp));
*dst = tmp + ALPHA_BLEND(*dst, 255 - surface->blender.alpha(tmp));
}
buffer += surface->stride;
cbuffer += surface->stride;
}
return true;
}
}
for (uint32_t y = 0; y < h; ++y) {
auto dst = &buffer[y * surface->stride];
fillFetchLinear(fill, sbuffer, region.min.y + y, region.min.x, w);
for (uint32_t x = 0; x < w; ++x) {
dst[x] = sbuffer[x] + ALPHA_BLEND(dst[x], 255 - surface->blender.alpha(sbuffer[x]));
}
}
return true;
}
static bool _rasterOpaqueLinearGradientRect(SwSurface* surface, const SwBBox& region, const SwFill* fill)
{
if (fill->linear.len < FLT_EPSILON) return false;
auto buffer = surface->buffer + (region.min.y * surface->stride) + region.min.x;
auto h = static_cast<uint32_t>(region.max.y - region.min.y);
auto w = static_cast<uint32_t>(region.max.x - region.min.x);
for (uint32_t y = 0; y < h; ++y) {
fillFetchLinear(fill, buffer + y * surface->stride, region.min.y + y, region.min.x, w);
}
return true;
}
static bool _rasterTranslucentRadialGradientRect(SwSurface* surface, const SwBBox& region, const SwFill* fill)
{
if (fill->radial.a < FLT_EPSILON) return false;
auto buffer = surface->buffer + (region.min.y * surface->stride) + region.min.x;
auto h = static_cast<uint32_t>(region.max.y - region.min.y);
auto w = static_cast<uint32_t>(region.max.x - region.min.x);
auto sbuffer = static_cast<uint32_t*>(alloca(w * sizeof(uint32_t)));
if (!sbuffer) return false;
if (surface->compositor) {
auto method = surface->compositor->method;
auto cbuffer = surface->compositor->image.data + (region.min.y * surface->stride) + region.min.x;
if (method == CompositeMethod::AlphaMask) {
for (uint32_t y = 0; y < h; ++y) {
fillFetchRadial(fill, sbuffer, region.min.y + y, region.min.x, w);
auto dst = buffer;
auto cmp = cbuffer;
auto src = sbuffer;
for (uint32_t x = 0; x < w; ++x, ++dst, ++cmp, ++src) {
auto tmp = ALPHA_BLEND(*src, surface->blender.alpha(*cmp));
*dst = tmp + ALPHA_BLEND(*dst, 255 - surface->blender.alpha(tmp));
}
buffer += surface->stride;
cbuffer += surface->stride;
}
return true;
} else if (method == CompositeMethod::InvAlphaMask) {
for (uint32_t y = 0; y < h; ++y) {
fillFetchRadial(fill, sbuffer, region.min.y + y, region.min.x, w);
auto dst = buffer;
auto cmp = cbuffer;
auto src = sbuffer;
for (uint32_t x = 0; x < w; ++x, ++dst, ++cmp, ++src) {
auto tmp = ALPHA_BLEND(*src, 255 - surface->blender.alpha(*cmp));
*dst = tmp + ALPHA_BLEND(*dst, 255 - surface->blender.alpha(tmp));
}
buffer += surface->stride;
cbuffer += surface->stride;
}
return true;
}
}
for (uint32_t y = 0; y < h; ++y) {
auto dst = &buffer[y * surface->stride];
fillFetchRadial(fill, sbuffer, region.min.y + y, region.min.x, w);
for (uint32_t x = 0; x < w; ++x) {
dst[x] = sbuffer[x] + ALPHA_BLEND(dst[x], 255 - surface->blender.alpha(sbuffer[x]));
}
}
return true;
}
static bool _rasterOpaqueRadialGradientRect(SwSurface* surface, const SwBBox& region, const SwFill* fill)
{
if (fill->radial.a < FLT_EPSILON) return false;
auto buffer = surface->buffer + (region.min.y * surface->stride) + region.min.x;
auto h = static_cast<uint32_t>(region.max.y - region.min.y);
auto w = static_cast<uint32_t>(region.max.x - region.min.x);
for (uint32_t y = 0; y < h; ++y) {
auto dst = &buffer[y * surface->stride];
fillFetchRadial(fill, dst, region.min.y + y, region.min.x, w);
}
return true;
}
static bool _translucentLinearGradientRle(SwSurface* surface, const SwRleData* rle, const SwFill* fill)
{
if (fill->linear.len < FLT_EPSILON) return false;
auto span = rle->spans;
auto buffer = static_cast<uint32_t*>(alloca(surface->w * sizeof(uint32_t)));
if (!buffer) return false;
for (uint32_t i = 0; i < rle->size; ++i, ++span) {
auto dst = &surface->buffer[span->y * surface->stride + span->x];
fillFetchLinear(fill, buffer, span->y, span->x, span->len);
if (span->coverage == 255) {
for (uint32_t i = 0; i < span->len; ++i) {
dst[i] = buffer[i] + ALPHA_BLEND(dst[i], 255 - surface->blender.alpha(buffer[i]));
}
} else {
for (uint32_t i = 0; i < span->len; ++i) {
auto tmp = ALPHA_BLEND(buffer[i], span->coverage);
dst[i] = tmp + ALPHA_BLEND(dst[i], 255 - surface->blender.alpha(tmp));
}
}
}
return true;
}
static bool _translucentLinearGradientRleAlphaMask(SwSurface* surface, const SwRleData* rle, const SwFill* fill)
{
if (fill->linear.len < FLT_EPSILON) return false;
auto span = rle->spans;
auto cbuffer = surface->compositor->image.data;
auto buffer = static_cast<uint32_t*>(alloca(surface->w * sizeof(uint32_t)));
if (!buffer) return false;
for (uint32_t i = 0; i < rle->size; ++i, ++span) {
fillFetchLinear(fill, buffer, span->y, span->x, span->len);
auto dst = &surface->buffer[span->y * surface->stride + span->x];
auto cmp = &cbuffer[span->y * surface->stride + span->x];
auto src = buffer;
if (span->coverage == 255) {
for (uint32_t x = 0; x < span->len; ++x, ++dst, ++cmp, ++src) {
auto tmp = ALPHA_BLEND(*src, surface->blender.alpha(*cmp));
*dst = tmp + ALPHA_BLEND(*dst, 255 - surface->blender.alpha(tmp));
}
} else {
auto ialpha = 255 - span->coverage;
for (uint32_t x = 0; x < span->len; ++x, ++dst, ++cmp, ++src) {
auto tmp = ALPHA_BLEND(*src, surface->blender.alpha(*cmp));
tmp = ALPHA_BLEND(tmp, span->coverage) + ALPHA_BLEND(*dst, ialpha);
*dst = tmp + ALPHA_BLEND(*dst, 255 - surface->blender.alpha(tmp));
}
}
}
return true;
}
static bool _translucentLinearGradientRleInvAlphaMask(SwSurface* surface, const SwRleData* rle, const SwFill* fill)
{
if (fill->linear.len < FLT_EPSILON) return false;
auto span = rle->spans;
auto cbuffer = surface->compositor->image.data;
auto buffer = static_cast<uint32_t*>(alloca(surface->w * sizeof(uint32_t)));
if (!buffer) return false;
for (uint32_t i = 0; i < rle->size; ++i, ++span) {
fillFetchLinear(fill, buffer, span->y, span->x, span->len);
auto dst = &surface->buffer[span->y * surface->stride + span->x];
auto cmp = &cbuffer[span->y * surface->stride + span->x];
auto src = buffer;
if (span->coverage == 255) {
for (uint32_t x = 0; x < span->len; ++x, ++dst, ++cmp, ++src) {
auto tmp = ALPHA_BLEND(*src, 255 - surface->blender.alpha(*cmp));
*dst = tmp + ALPHA_BLEND(*dst, 255 - surface->blender.alpha(tmp));
}
} else {
auto ialpha = 255 - span->coverage;
for (uint32_t x = 0; x < span->len; ++x, ++dst, ++cmp, ++src) {
auto tmp = ALPHA_BLEND(*src, 255 - surface->blender.alpha(*cmp));
tmp = ALPHA_BLEND(tmp, span->coverage) + ALPHA_BLEND(*dst, ialpha);
*dst = tmp + ALPHA_BLEND(*dst, 255 - surface->blender.alpha(tmp));
}
}
}
return true;
}
static bool _rasterTranslucentLinearGradientRle(SwSurface* surface, const SwRleData* rle, const SwFill* fill)
{
if (!rle) return false;
if (surface->compositor) {
if (surface->compositor->method == CompositeMethod::AlphaMask) {
return _translucentLinearGradientRleAlphaMask(surface, rle, fill);
}
if (surface->compositor->method == CompositeMethod::InvAlphaMask) {
return _translucentLinearGradientRleInvAlphaMask(surface, rle, fill);
}
}
return _translucentLinearGradientRle(surface, rle, fill);
}
static bool _rasterOpaqueLinearGradientRle(SwSurface* surface, const SwRleData* rle, const SwFill* fill)
{
if (fill->linear.len < FLT_EPSILON) return false;
auto buf = static_cast<uint32_t*>(alloca(surface->w * sizeof(uint32_t)));
if (!buf) return false;
auto span = rle->spans;
for (uint32_t i = 0; i < rle->size; ++i) {
if (span->coverage == 255) {
fillFetchLinear(fill, surface->buffer + span->y * surface->stride + span->x, span->y, span->x, span->len);
} else {
fillFetchLinear(fill, buf, span->y, span->x, span->len);
auto ialpha = 255 - span->coverage;
auto dst = &surface->buffer[span->y * surface->stride + span->x];
for (uint32_t i = 0; i < span->len; ++i) {
dst[i] = ALPHA_BLEND(buf[i], span->coverage) + ALPHA_BLEND(dst[i], ialpha);
}
}
++span;
}
return true;
}
static bool _rasterTranslucentRadialGradientRle(SwSurface* surface, const SwRleData* rle, const SwFill* fill)
{
if (fill->radial.a < FLT_EPSILON) return false;
auto buf = static_cast<uint32_t*>(alloca(surface->w * sizeof(uint32_t)));
if (!buf) return false;
auto span = rle->spans;
if (surface->compositor) {
auto method = surface->compositor->method;
auto cbuffer = surface->compositor->image.data;
if (method == CompositeMethod::AlphaMask) {
for (uint32_t i = 0; i < rle->size; ++i, ++span) {
fillFetchRadial(fill, buf, span->y, span->x, span->len);
auto dst = &surface->buffer[span->y * surface->stride + span->x];
auto cmp = &cbuffer[span->y * surface->stride + span->x];
auto src = buf;
if (span->coverage == 255) {
for (uint32_t x = 0; x < span->len; ++x, ++dst, ++cmp, ++src) {
auto tmp = ALPHA_BLEND(*src, surface->blender.alpha(*cmp));
*dst = tmp + ALPHA_BLEND(*dst, 255 - surface->blender.alpha(tmp));
}
} else {
auto ialpha = 255 - span->coverage;
for (uint32_t x = 0; x < span->len; ++x, ++dst, ++cmp, ++src) {
auto tmp = ALPHA_BLEND(*src, surface->blender.alpha(*cmp));
tmp = ALPHA_BLEND(tmp, span->coverage) + ALPHA_BLEND(*dst, ialpha);
*dst = tmp + ALPHA_BLEND(*dst, 255 - surface->blender.alpha(tmp));
}
}
}
return true;
} else if (method == CompositeMethod::InvAlphaMask) {
for (uint32_t i = 0; i < rle->size; ++i, ++span) {
fillFetchRadial(fill, buf, span->y, span->x, span->len);
auto dst = &surface->buffer[span->y * surface->stride + span->x];
auto cmp = &cbuffer[span->y * surface->stride + span->x];
auto src = buf;
if (span->coverage == 255) {
for (uint32_t x = 0; x < span->len; ++x, ++dst, ++cmp, ++src) {
auto tmp = ALPHA_BLEND(*src, 255 - surface->blender.alpha(*cmp));
*dst = tmp + ALPHA_BLEND(*dst, 255 - surface->blender.alpha(tmp));
}
} else {
auto ialpha = 255 - span->coverage;
for (uint32_t x = 0; x < span->len; ++x, ++dst, ++cmp, ++src) {
auto tmp = ALPHA_BLEND(*src, 255 - surface->blender.alpha(*cmp));
tmp = ALPHA_BLEND(tmp, span->coverage) + ALPHA_BLEND(*dst, ialpha);
*dst = tmp + ALPHA_BLEND(*dst, 255 - surface->blender.alpha(tmp));
}
}
}
return true;
}
}
for (uint32_t i = 0; i < rle->size; ++i) {
auto dst = &surface->buffer[span->y * surface->stride + span->x];
fillFetchRadial(fill, buf, span->y, span->x, span->len);
if (span->coverage == 255) {
for (uint32_t i = 0; i < span->len; ++i) {
dst[i] = buf[i] + ALPHA_BLEND(dst[i], 255 - surface->blender.alpha(buf[i]));
}
} else {
for (uint32_t i = 0; i < span->len; ++i) {
auto tmp = ALPHA_BLEND(buf[i], span->coverage);
dst[i] = tmp + ALPHA_BLEND(dst[i], 255 - surface->blender.alpha(tmp));
}
}
++span;
}
return true;
}
static bool _rasterOpaqueRadialGradientRle(SwSurface* surface, const SwRleData* rle, const SwFill* fill)
{
if (fill->radial.a < FLT_EPSILON) return false;
auto buf = static_cast<uint32_t*>(alloca(surface->w * sizeof(uint32_t)));
if (!buf) return false;
auto span = rle->spans;
for (uint32_t i = 0; i < rle->size; ++i) {
auto dst = &surface->buffer[span->y * surface->stride + span->x];
if (span->coverage == 255) {
fillFetchRadial(fill, dst, span->y, span->x, span->len);
} else {
fillFetchRadial(fill, buf, span->y, span->x, span->len);
auto ialpha = 255 - span->coverage;
for (uint32_t i = 0; i < span->len; ++i) {
dst[i] = ALPHA_BLEND(buf[i], span->coverage) + ALPHA_BLEND(dst[i], ialpha);
}
}
++span;
}
return true;
}
/************************************************************************/
/* External Class Implementation */
/************************************************************************/
bool rasterCompositor(SwSurface* surface)
{
if (surface->cs == SwCanvas::ABGR8888) {
surface->blender.alpha = _colorAlpha;
surface->blender.join = _abgrJoin;
} else if (surface->cs == SwCanvas::ARGB8888) {
surface->blender.alpha = _colorAlpha;
surface->blender.join = _argbJoin;
} else {
//What Color Space ???
return false;
}
return true;
}
bool rasterGradientShape(SwSurface* surface, SwShape* shape, unsigned id)
{
if (!shape->fill) return false;
auto translucent = shape->fill->translucent || (surface->compositor && surface->compositor->method != CompositeMethod::None);
//Fast Track
if (shape->rect) {
if (id == FILL_ID_LINEAR) {
if (translucent) return _rasterTranslucentLinearGradientRect(surface, shape->bbox, shape->fill);
return _rasterOpaqueLinearGradientRect(surface, shape->bbox, shape->fill);
} else {
if (translucent) return _rasterTranslucentRadialGradientRect(surface, shape->bbox, shape->fill);
return _rasterOpaqueRadialGradientRect(surface, shape->bbox, shape->fill);
}
} else {
if (!shape->rle) return false;
if (id == FILL_ID_LINEAR) {
if (translucent) return _rasterTranslucentLinearGradientRle(surface, shape->rle, shape->fill);
return _rasterOpaqueLinearGradientRle(surface, shape->rle, shape->fill);
} else {
if (translucent) return _rasterTranslucentRadialGradientRle(surface, shape->rle, shape->fill);
return _rasterOpaqueRadialGradientRle(surface, shape->rle, shape->fill);
}
}
return false;
}
bool rasterSolidShape(SwSurface* surface, SwShape* shape, uint8_t r, uint8_t g, uint8_t b, uint8_t a)
{
if (a < 255) {
r = ALPHA_MULTIPLY(r, a);
g = ALPHA_MULTIPLY(g, a);
b = ALPHA_MULTIPLY(b, a);
}
auto color = surface->blender.join(r, g, b, a);
auto translucent = _translucent(surface, a);
//Fast Track
if (shape->rect) {
if (translucent) return _rasterTranslucentRect(surface, shape->bbox, color);
return _rasterSolidRect(surface, shape->bbox, color);
}
if (translucent) {
return _rasterTranslucentRle(surface, shape->rle, color);
}
return _rasterSolidRle(surface, shape->rle, color);
}
bool rasterStroke(SwSurface* surface, SwShape* shape, uint8_t r, uint8_t g, uint8_t b, uint8_t a)
{
if (a < 255) {
r = ALPHA_MULTIPLY(r, a);
g = ALPHA_MULTIPLY(g, a);
b = ALPHA_MULTIPLY(b, a);
}
auto color = surface->blender.join(r, g, b, a);
auto translucent = _translucent(surface, a);
if (translucent) return _rasterTranslucentRle(surface, shape->strokeRle, color);
return _rasterSolidRle(surface, shape->strokeRle, color);
}
bool rasterGradientStroke(SwSurface* surface, SwShape* shape, unsigned id)
{
if (!shape->stroke || !shape->stroke->fill || !shape->strokeRle) return false;
auto translucent = shape->stroke->fill->translucent || (surface->compositor && surface->compositor->method != CompositeMethod::None);
if (id == FILL_ID_LINEAR) {
if (translucent) return _rasterTranslucentLinearGradientRle(surface, shape->strokeRle, shape->stroke->fill);
return _rasterOpaqueLinearGradientRle(surface, shape->strokeRle, shape->stroke->fill);
} else {
if (translucent) return _rasterTranslucentRadialGradientRle(surface, shape->strokeRle, shape->stroke->fill);
return _rasterOpaqueRadialGradientRle(surface, shape->strokeRle, shape->stroke->fill);
}
return false;
}
bool rasterClear(SwSurface* surface)
{
if (!surface || !surface->buffer || surface->stride <= 0 || surface->w <= 0 || surface->h <= 0) return false;
if (surface->w == surface->stride) {
rasterRGBA32(surface->buffer, 0x00000000, 0, surface->w * surface->h);
} else {
for (uint32_t i = 0; i < surface->h; i++) {
rasterRGBA32(surface->buffer + surface->stride * i, 0x00000000, 0, surface->w);
}
}
return true;
}
bool rasterImage(SwSurface* surface, SwImage* image, const Matrix* transform, const SwBBox& bbox, uint32_t opacity)
{
Matrix invTransform;
if (transform) {
if (!_inverse(transform, &invTransform)) return false;
}
else invTransform = {1, 0, 0, 0, 1, 0, 0, 0, 1};
auto translucent = _translucent(surface, opacity);
if (image->rle) {
//Fast track
if (_identify(transform)) {
//OPTIMIZE ME: Support non transformed image. Only shifted image can use these routines.
if (translucent) return _rasterTranslucentImageRle(surface, image->rle, image->data, image->w, image->h, opacity);
return _rasterImageRle(surface, image->rle, image->data, image->w, image->h);
} else {
if (translucent) return _rasterTranslucentImageRle(surface, image->rle, image->data, image->w, image->h, opacity, &invTransform);
return _rasterImageRle(surface, image->rle, image->data, image->w, image->h, &invTransform);
}
}
else {
//Fast track
if (_identify(transform)) {
//OPTIMIZE ME: Support non transformed image. Only shifted image can use these routines.
if (translucent) return _rasterTranslucentImage(surface, image->data, image->w, image->h, opacity, bbox);
else return _rasterImage(surface, image->data, image->w, image->h, bbox);
} else {
if (translucent) return _rasterTranslucentImage(surface, image->data, image->w, image->h, opacity, bbox, &invTransform);
else return _rasterImage(surface, image->data, image->w, image->h, bbox, &invTransform);
}
}
}
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