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Texture binding

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Aiden
2026-05-08 17:04:28 +10:00
parent 7d8f9a39d1
commit f458eb0130
7 changed files with 181 additions and 78 deletions
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48
apps/LoopThroughWithOpenGLCompositing/gl/pipeline/OpenGLRenderPass.cpp
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@@ -173,52 +173,16 @@ void OpenGLRenderPass::RenderShaderProgram(
glBindFramebuffer(GL_FRAMEBUFFER, destinationFrameBuffer);
glViewport(0, 0, inputFrameWidth, inputFrameHeight);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glActiveTexture(GL_TEXTURE0 + kDecodedVideoTextureUnit);
glBindTexture(GL_TEXTURE_2D, sourceTexture);
mRenderer.TemporalHistory().BindSamplers(state, sourceTexture, historyCap);
BindLayerTextureAssets(layerProgram);
const std::vector<GLuint> sourceHistoryTextures = mRenderer.TemporalHistory().ResolveSourceHistoryTextures(sourceTexture, state.isTemporal ? historyCap : 0);
const std::vector<GLuint> temporalHistoryTextures = mRenderer.TemporalHistory().ResolveTemporalHistoryTextures(state, sourceTexture, state.isTemporal ? historyCap : 0);
const ShaderTextureBindings::RuntimeTextureBindingPlan texturePlan =
mTextureBindings.BuildLayerRuntimeBindingPlan(layerProgram, sourceTexture, sourceHistoryTextures, temporalHistoryTextures);
mTextureBindings.BindRuntimeTexturePlan(texturePlan);
glBindVertexArray(mRenderer.FullscreenVertexArray());
glUseProgram(layerProgram.program);
updateGlobalParams(state, mRenderer.TemporalHistory().SourceAvailableCount(), mRenderer.TemporalHistory().AvailableCountForLayer(state.layerId));
glDrawArrays(GL_TRIANGLES, 0, 3);
glUseProgram(0);
glBindVertexArray(0);
UnbindLayerTextureAssets(layerProgram, historyCap);
}
void OpenGLRenderPass::BindLayerTextureAssets(const LayerProgram& layerProgram)
{
const GLuint shaderTextureBase = layerProgram.shaderTextureBase != 0 ? layerProgram.shaderTextureBase : kSourceHistoryTextureUnitBase;
for (std::size_t index = 0; index < layerProgram.textureBindings.size(); ++index)
{
glActiveTexture(GL_TEXTURE0 + shaderTextureBase + static_cast<GLuint>(index));
glBindTexture(GL_TEXTURE_2D, layerProgram.textureBindings[index].texture);
}
const GLuint textTextureBase = shaderTextureBase + static_cast<GLuint>(layerProgram.textureBindings.size());
for (std::size_t index = 0; index < layerProgram.textBindings.size(); ++index)
{
glActiveTexture(GL_TEXTURE0 + textTextureBase + static_cast<GLuint>(index));
glBindTexture(GL_TEXTURE_2D, layerProgram.textBindings[index].texture);
}
glActiveTexture(GL_TEXTURE0);
}
void OpenGLRenderPass::UnbindLayerTextureAssets(const LayerProgram& layerProgram, unsigned historyCap)
{
for (unsigned index = 0; index < historyCap; ++index)
{
glActiveTexture(GL_TEXTURE0 + kSourceHistoryTextureUnitBase + index);
glBindTexture(GL_TEXTURE_2D, 0);
glActiveTexture(GL_TEXTURE0 + kSourceHistoryTextureUnitBase + historyCap + index);
glBindTexture(GL_TEXTURE_2D, 0);
}
const GLuint shaderTextureBase = layerProgram.shaderTextureBase != 0 ? layerProgram.shaderTextureBase : kSourceHistoryTextureUnitBase;
for (std::size_t index = 0; index < layerProgram.textureBindings.size() + layerProgram.textBindings.size(); ++index)
{
glActiveTexture(GL_TEXTURE0 + shaderTextureBase + static_cast<GLuint>(index));
glBindTexture(GL_TEXTURE_2D, 0);
}
glActiveTexture(GL_TEXTURE0 + kDecodedVideoTextureUnit);
glBindTexture(GL_TEXTURE_2D, 0);
glActiveTexture(GL_TEXTURE0);
mTextureBindings.UnbindRuntimeTexturePlan(texturePlan);
}

4
apps/LoopThroughWithOpenGLCompositing/gl/pipeline/OpenGLRenderPass.h
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@@ -2,6 +2,7 @@
#include "OpenGLRenderer.h"
#include "RenderPassDescriptor.h"
#include "ShaderTextureBindings.h"
#include "ShaderTypes.h"
#include "VideoIOFormat.h"
@@ -51,8 +52,7 @@ private:
unsigned historyCap,
const TextBindingUpdater& updateTextBinding,
const GlobalParamsUpdater& updateGlobalParams);
void BindLayerTextureAssets(const LayerProgram& layerProgram);
void UnbindLayerTextureAssets(const LayerProgram& layerProgram, unsigned historyCap);
OpenGLRenderer& mRenderer;
ShaderTextureBindings mTextureBindings;
};

23
apps/LoopThroughWithOpenGLCompositing/gl/pipeline/TemporalHistoryBuffers.cpp
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@@ -212,6 +212,29 @@ void TemporalHistoryBuffers::BindSamplers(const RuntimeRenderState& state, GLuin
glActiveTexture(GL_TEXTURE0);
}
std::vector<GLuint> TemporalHistoryBuffers::ResolveSourceHistoryTextures(GLuint fallbackTexture, unsigned historyCap) const
{
std::vector<GLuint> textures;
textures.reserve(historyCap);
for (unsigned index = 0; index < historyCap; ++index)
textures.push_back(ResolveTexture(sourceHistoryRing, fallbackTexture, index));
return textures;
}
std::vector<GLuint> TemporalHistoryBuffers::ResolveTemporalHistoryTextures(const RuntimeRenderState& state, GLuint fallbackTexture, unsigned historyCap) const
{
const Ring* temporalRing = nullptr;
auto it = preLayerHistoryByLayerId.find(state.layerId);
if (it != preLayerHistoryByLayerId.end())
temporalRing = &it->second;
std::vector<GLuint> textures;
textures.reserve(historyCap);
for (unsigned index = 0; index < historyCap; ++index)
textures.push_back(temporalRing ? ResolveTexture(*temporalRing, fallbackTexture, index) : fallbackTexture);
return textures;
}
GLuint TemporalHistoryBuffers::ResolveTexture(const Ring& ring, GLuint fallbackTexture, std::size_t framesAgo) const
{
if (ring.filledCount == 0 || ring.slots.empty())

2
apps/LoopThroughWithOpenGLCompositing/gl/pipeline/TemporalHistoryBuffers.h
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@@ -40,6 +40,8 @@ public:
void PushSourceFramebuffer(GLuint sourceFramebuffer, unsigned frameWidth, unsigned frameHeight);
void PushPreLayerFramebuffer(const std::string& layerId, GLuint sourceFramebuffer, unsigned frameWidth, unsigned frameHeight);
void BindSamplers(const RuntimeRenderState& state, GLuint currentSourceTexture, unsigned historyCap);
std::vector<GLuint> ResolveSourceHistoryTextures(GLuint fallbackTexture, unsigned historyCap) const;
std::vector<GLuint> ResolveTemporalHistoryTextures(const RuntimeRenderState& state, GLuint fallbackTexture, unsigned historyCap) const;
GLuint ResolveTexture(const Ring& ring, GLuint fallbackTexture, std::size_t framesAgo) const;
unsigned SourceAvailableCount() const;
unsigned AvailableCountForLayer(const std::string& layerId) const;