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gl_engine: append stencil attachment in GLRenderTarget

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Plans to use stencil to test support for path clipping and complex path rendering
When the tessellation algorithm cannot handle it.
This commit is contained in:
RuiwenTang 2024-01-18 11:31:46 +08:00 • committed by Hermet Park
parent c9ee5d274d
commit fc7ba88585
3 changed files with 18 additions and 7 deletions
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13
src/renderer/gl_engine/tvgGlRenderPass.cpp
View file

@ -32,8 +32,8 @@ GlRenderTarget::~GlRenderTarget()
GL_CHECK(glBindFramebuffer(GL_FRAMEBUFFER, 0));
GL_CHECK(glDeleteFramebuffers(1, &mFbo));
if (mColorTex == 0) return;
GL_CHECK(glDeleteTextures(1, &mColorTex));
if (mColorTex != 0) GL_CHECK(glDeleteTextures(1, &mColorTex));
if (mStencilBuffer != 0) GL_CHECK(glDeleteRenderbuffers(1, &mStencilBuffer));
}
void GlRenderTarget::init(GLint resolveId)
@ -56,7 +56,16 @@ void GlRenderTarget::init(GLint resolveId)
GL_CHECK(glBindTexture(GL_TEXTURE_2D, 0));
GL_CHECK(glGenRenderbuffers(1, &mStencilBuffer));
GL_CHECK(glBindRenderbuffer(GL_RENDERBUFFER, mStencilBuffer));
GL_CHECK(glRenderbufferStorage(GL_RENDERBUFFER, GL_STENCIL_INDEX8, mWidth, mHeight));
GL_CHECK(glBindRenderbuffer(GL_RENDERBUFFER, 0));
GL_CHECK(glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, mColorTex, 0));
GL_CHECK(glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_STENCIL_ATTACHMENT, GL_RENDERBUFFER, mStencilBuffer));
GL_CHECK(glBindFramebuffer(GL_FRAMEBUFFER, resolveId));
}

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

@ -47,6 +47,7 @@ private:
uint32_t mHeight = 0;
GLuint mFbo = 0;
GLuint mColorTex = 0;
GLuint mStencilBuffer = 0;
};
class GlRenderPass

11
src/renderer/gl_engine/tvgGlRenderTask.cpp
View file

@ -111,15 +111,16 @@ void GlComposeTask::run()
GL_CHECK(glBindFramebuffer(GL_FRAMEBUFFER, getSelfFbo()));
// clear this fbo
GLenum color_buffer = GL_COLOR_ATTACHMENT0;
const float transparent[] = {0.f, 0.f, 0.f, 0.f};
GL_CHECK(glDrawBuffers(1, &color_buffer));
GL_CHECK(glClearBufferfv(GL_COLOR, 0, transparent));
GL_CHECK(glClearColor(0, 0, 0, 0));
GL_CHECK(glClearStencil(0));
GL_CHECK(glClear(GL_COLOR_BUFFER_BIT | GL_STENCIL_BUFFER_BIT));
for(uint32_t i = 0; i < mTasks.count; i++) {
mTasks[i]->run();
}
GLenum stencil_attachment = GL_STENCIL_ATTACHMENT;
GL_CHECK(glInvalidateFramebuffer(GL_FRAMEBUFFER, 1, &stencil_attachment));
}
GlBlitTask::GlBlitTask(GlProgram* program, GLuint target, GLuint compose, Array<GlRenderTask*>&& tasks)