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Code Issues Projects Releases Packages Wiki Activity Actions 5

gl_engine: Introduce fill effect for opengl renderer

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issue: https://github.com/thorvg/thorvg/issues/3054
This commit is contained in:
Sergii Liebodkin 2025-04-09 10:28:36 +00:00 • committed by Hermet Park
parent bf3bd908ff
commit 85e215a294
7 changed files with 100 additions and 0 deletions
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5
src/renderer/gl_engine/tvgGlCommon.h
View file

@ -208,4 +208,9 @@ struct GlGaussianBlur {
float extend{};
};
struct GlEffectParams {
// fill: [0..3]: color
float params[4+4+4];
};
#endif /* _TVG_GL_COMMON_H_ */

24
src/renderer/gl_engine/tvgGlRenderTask.cpp
View file

@ -434,3 +434,27 @@ void GlGaussianBlurTask::run()
}
GL_CHECK(glEnable(GL_BLEND));
}
void GlEffectColorTransformTask::run()
{
// const auto vp = getViewport();
const auto width = mDstFbo->getWidth();
const auto height = mDstFbo->getHeight();
// get targets handles and pass to shader
GLuint dstCopyTexId = mDstCopyFbo->getColorTexture();
GLint srcTextureLoc = getProgram()->getUniformLocation("uSrcTexture");
addBindResource({ 0, dstCopyTexId, srcTextureLoc });
GL_CHECK(glViewport(0, 0, width, height));
GL_CHECK(glScissor(0, 0, width, height));
// we need to make full copy of dst to intermediate buffers to be sure, that they are not contained prev data
GL_CHECK(glBindFramebuffer(GL_READ_FRAMEBUFFER, mDstFbo->getFboId()));
GL_CHECK(glBindFramebuffer(GL_DRAW_FRAMEBUFFER, mDstCopyFbo->getResolveFboId()));
GL_CHECK(glBlitFramebuffer(0, 0, width, height, 0, 0, width, height, GL_COLOR_BUFFER_BIT, GL_NEAREST));
GL_CHECK(glBindFramebuffer(GL_FRAMEBUFFER, mDstFbo->getFboId()));
// run transform
GL_CHECK(glDisable(GL_BLEND));
GlRenderTask::run();
GL_CHECK(glEnable(GL_BLEND));
}

13
src/renderer/gl_engine/tvgGlRenderTask.h
View file

@ -237,4 +237,17 @@ private:
GlRenderTarget* mDstCopyFbo1;
};
class GlEffectColorTransformTask: public GlRenderTask
{
public:
GlEffectColorTransformTask(GlProgram* program, GlRenderTarget* dstFbo, GlRenderTarget* dstCopyFbo):
GlRenderTask(program), mDstFbo(dstFbo), mDstCopyFbo(dstCopyFbo) {};
~GlEffectColorTransformTask() {};
void run() override;
private:
GlRenderTarget* mDstFbo;
GlRenderTarget* mDstCopyFbo;
};
#endif /* _TVG_GL_RENDER_TASK_H_ */

34
src/renderer/gl_engine/tvgGlRenderer.cpp
View file

@ -144,6 +144,7 @@ void GlRenderer::initShaders()
// effects
mPrograms.push(new GlProgram(EFFECT_VERTEX, GAUSSIAN_VERTICAL));
mPrograms.push(new GlProgram(EFFECT_VERTEX, GAUSSIAN_HORIZONTAL));
mPrograms.push(new GlProgram(EFFECT_VERTEX, EFFECT_FILL));
}
@ -961,6 +962,19 @@ void GlRenderer::effectGaussianBlurUpdate(RenderEffectGaussianBlur* effect, cons
}
void GlRenderer::effectFillUpdate(RenderEffectFill* effect, const Matrix& transform)
{
auto params = (GlEffectParams*)effect->rd;
if (!params) params = tvg::malloc<GlEffectParams*>(sizeof(GlEffectParams));
params->params[0] = effect->color[0] / 255.0f;
params->params[1] = effect->color[1] / 255.0f;
params->params[2] = effect->color[2] / 255.0f;
params->params[3] = effect->color[3] / 255.0f;
effect->rd = params;
effect->valid = true;
}
bool GlRenderer::effectGaussianBlurRegion(RenderEffectGaussianBlur* effect)
{
auto gaussianBlur = (GlGaussianBlur*)effect->rd;
@ -984,6 +998,7 @@ void GlRenderer::prepare(RenderEffect* effect, const Matrix& transform)
switch (effect->type) {
case SceneEffect::GaussianBlur: effectGaussianBlurUpdate(static_cast<RenderEffectGaussianBlur*>(effect), transform); break;
case SceneEffect::Fill: effectFillUpdate(static_cast<RenderEffectFill*>(effect), transform); break;
default: break;
}
effect->valid = true;
@ -994,6 +1009,7 @@ bool GlRenderer::region(RenderEffect* effect)
{
switch (effect->type) {
case SceneEffect::GaussianBlur: return effectGaussianBlurRegion(static_cast<RenderEffectGaussianBlur*>(effect));
case SceneEffect::Fill: return true;
default: return false;
}
return false;
@ -1041,6 +1057,24 @@ bool GlRenderer::render(TVG_UNUSED RenderCompositor* cmp, const RenderEffect* ef
gaussianTask->vertTask->setDrawRange(ioffset, 6);
// add task to render pipeline
pass->addRenderTask(gaussianTask);
} // effect fill
else if (effect->type == SceneEffect::Fill) {
GlProgram* program{};
if (effect->type == SceneEffect::Fill) program = mPrograms[RT_EffectFill];
// get current and intermidiate framebuffers
auto dstFbo = pass->getFbo();
auto dstCopyFbo = mBlendPool[0]->getRenderTarget(vp);
// add uniform data
auto params = (GlEffectParams*)(effect->rd);
auto paramsOffset = mGpuBuffer.push(params, sizeof(GlEffectParams), true);
// create gaussian blur tasks
auto task = new GlEffectColorTransformTask(program, dstFbo, dstCopyFbo);
task->setViewport({0, 0, vp.w, vp.h});
task->addBindResource(GlBindingResource{0, program->getUniformBlockIndex("Params"), mGpuBuffer.getBufferId(), paramsOffset, sizeof(GlEffectParams)});
task->addVertexLayout(GlVertexLayout{0, 2, 2 * sizeof(float), voffset});
task->setDrawRange(ioffset, 6);
// add task to render pipeline
pass->addRenderTask(task);
}
return false;
}

6
src/renderer/gl_engine/tvgGlRenderer.h
View file

@ -62,6 +62,10 @@ public:
RT_GaussianVert,
RT_GaussianHorz,
//RT_DropShadow,
RT_EffectFill,
RT_EffectTint,
RT_EffectTritone,
RT_None,
};
@ -120,6 +124,8 @@ private:
void endRenderPass(RenderCompositor* cmp);
void effectGaussianBlurUpdate(RenderEffectGaussianBlur* effect, const Matrix& transform);
void effectFillUpdate(RenderEffectFill* effect, const Matrix& transform);
bool effectGaussianBlurRegion(RenderEffectGaussianBlur* effect);
void flush();

17
src/renderer/gl_engine/tvgGlShaderSrc.cpp
View file

@ -820,3 +820,20 @@ void main()
FragColor = colorSum / weightSum;
}
)";
const char* EFFECT_FILL = R"(
uniform sampler2D uSrcTexture;
layout(std140) uniform Params {
vec4 params[3];
} uParams;
in vec2 vUV;
out vec4 FragColor;
void main()
{
vec4 orig = texture(uSrcTexture, vUV);
vec4 fill = uParams.params[0];
FragColor = fill * orig.a * fill.a;
}
)";

1
src/renderer/gl_engine/tvgGlShaderSrc.h
View file

@ -57,5 +57,6 @@ extern const char* EXCLUSION_BLEND_FRAG;
extern const char* EFFECT_VERTEX;
extern const char* GAUSSIAN_VERTICAL;
extern const char* GAUSSIAN_HORIZONTAL;
extern const char* EFFECT_FILL;
#endif /* _TVG_GL_SHADERSRC_H_ */