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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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41
apps/LoopThroughWithOpenGLCompositing/gl/shader/ShaderProgramCompiler.cpp
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@@ -101,51 +101,24 @@ bool ShaderProgramCompiler::CompilePreparedLayerProgram(const RuntimeRenderState
std::vector<LayerProgram::TextBinding> textBindings;
mTextureBindings.CreateTextBindings(state, textBindings);
layerProgram.layerId = state.layerId;
layerProgram.shaderId = state.shaderId;
layerProgram.shaderTextureBase = mTextureBindings.ResolveShaderTextureBase(state, mRuntimeHost.GetMaxTemporalHistoryFrames());
layerProgram.textureBindings.swap(textureBindings);
layerProgram.textBindings.swap(textBindings);
const GLuint globalParamsIndex = glGetUniformBlockIndex(newProgram.get(), "GlobalParams");
if (globalParamsIndex != GL_INVALID_INDEX)
glUniformBlockBinding(newProgram.get(), globalParamsIndex, kGlobalParamsBindingPoint);
const unsigned historyCap = mRuntimeHost.GetMaxTemporalHistoryFrames();
const GLuint shaderTextureBase = state.isTemporal ? kSourceHistoryTextureUnitBase + historyCap + historyCap : kSourceHistoryTextureUnitBase;
glUseProgram(newProgram.get());
const GLint videoInputLocation = glGetUniformLocation(newProgram.get(), "gVideoInput");
if (videoInputLocation >= 0)
glUniform1i(videoInputLocation, static_cast<GLint>(kDecodedVideoTextureUnit));
for (unsigned index = 0; index < historyCap; ++index)
{
const std::string sourceSamplerName = "gSourceHistory" + std::to_string(index);
const GLint sourceSamplerLocation = glGetUniformLocation(newProgram.get(), sourceSamplerName.c_str());
if (sourceSamplerLocation >= 0)
glUniform1i(sourceSamplerLocation, static_cast<GLint>(kSourceHistoryTextureUnitBase + index));
const std::string temporalSamplerName = "gTemporalHistory" + std::to_string(index);
const GLint temporalSamplerLocation = glGetUniformLocation(newProgram.get(), temporalSamplerName.c_str());
if (temporalSamplerLocation >= 0)
glUniform1i(temporalSamplerLocation, static_cast<GLint>(kSourceHistoryTextureUnitBase + historyCap + index));
}
for (std::size_t index = 0; index < textureBindings.size(); ++index)
{
const GLint textureSamplerLocation = mTextureBindings.FindSamplerUniformLocation(newProgram.get(), textureBindings[index].samplerName);
if (textureSamplerLocation >= 0)
glUniform1i(textureSamplerLocation, static_cast<GLint>(shaderTextureBase + static_cast<GLuint>(index)));
}
const GLuint textTextureBase = shaderTextureBase + static_cast<GLuint>(textureBindings.size());
for (std::size_t index = 0; index < textBindings.size(); ++index)
{
const GLint textSamplerLocation = mTextureBindings.FindSamplerUniformLocation(newProgram.get(), textBindings[index].samplerName);
if (textSamplerLocation >= 0)
glUniform1i(textSamplerLocation, static_cast<GLint>(textTextureBase + static_cast<GLuint>(index)));
}
mTextureBindings.AssignLayerSamplerUniforms(newProgram.get(), state, layerProgram, historyCap);
glUseProgram(0);
layerProgram.layerId = state.layerId;
layerProgram.shaderId = state.shaderId;
layerProgram.shaderTextureBase = shaderTextureBase;
layerProgram.program = newProgram.release();
layerProgram.vertexShader = newVertexShader.release();
layerProgram.fragmentShader = newFragmentShader.release();
layerProgram.textureBindings.swap(textureBindings);
layerProgram.textBindings.swap(textBindings);
return true;
}

119
apps/LoopThroughWithOpenGLCompositing/gl/shader/ShaderTextureBindings.cpp
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@@ -102,3 +102,122 @@ GLint ShaderTextureBindings::FindSamplerUniformLocation(GLuint program, const st
return location;
return glGetUniformLocation(program, (samplerName + "_0").c_str());
}
GLuint ShaderTextureBindings::ResolveShaderTextureBase(const RuntimeRenderState& state, unsigned historyCap) const
{
return state.isTemporal ? kSourceHistoryTextureUnitBase + historyCap + historyCap : kSourceHistoryTextureUnitBase;
}
void ShaderTextureBindings::AssignLayerSamplerUniforms(GLuint program, const RuntimeRenderState& state, const LayerProgram& layerProgram, unsigned historyCap) const
{
const GLuint shaderTextureBase = ResolveShaderTextureBase(state, historyCap);
const GLint videoInputLocation = glGetUniformLocation(program, "gVideoInput");
if (videoInputLocation >= 0)
glUniform1i(videoInputLocation, static_cast<GLint>(kDecodedVideoTextureUnit));
for (unsigned index = 0; index < historyCap; ++index)
{
const std::string sourceSamplerName = "gSourceHistory" + std::to_string(index);
const GLint sourceSamplerLocation = glGetUniformLocation(program, sourceSamplerName.c_str());
if (sourceSamplerLocation >= 0)
glUniform1i(sourceSamplerLocation, static_cast<GLint>(kSourceHistoryTextureUnitBase + index));
const std::string temporalSamplerName = "gTemporalHistory" + std::to_string(index);
const GLint temporalSamplerLocation = glGetUniformLocation(program, temporalSamplerName.c_str());
if (temporalSamplerLocation >= 0)
glUniform1i(temporalSamplerLocation, static_cast<GLint>(kSourceHistoryTextureUnitBase + historyCap + index));
}
for (std::size_t index = 0; index < layerProgram.textureBindings.size(); ++index)
{
const GLint textureSamplerLocation = FindSamplerUniformLocation(program, layerProgram.textureBindings[index].samplerName);
if (textureSamplerLocation >= 0)
glUniform1i(textureSamplerLocation, static_cast<GLint>(shaderTextureBase + static_cast<GLuint>(index)));
}
const GLuint textTextureBase = shaderTextureBase + static_cast<GLuint>(layerProgram.textureBindings.size());
for (std::size_t index = 0; index < layerProgram.textBindings.size(); ++index)
{
const GLint textSamplerLocation = FindSamplerUniformLocation(program, layerProgram.textBindings[index].samplerName);
if (textSamplerLocation >= 0)
glUniform1i(textSamplerLocation, static_cast<GLint>(textTextureBase + static_cast<GLuint>(index)));
}
}
ShaderTextureBindings::RuntimeTextureBindingPlan ShaderTextureBindings::BuildLayerRuntimeBindingPlan(
const LayerProgram& layerProgram,
GLuint layerInputTexture,
const std::vector<GLuint>& sourceHistoryTextures,
const std::vector<GLuint>& temporalHistoryTextures) const
{
RuntimeTextureBindingPlan plan;
plan.bindings.push_back({ "layerInput", "gVideoInput", layerInputTexture, kDecodedVideoTextureUnit });
for (std::size_t index = 0; index < sourceHistoryTextures.size(); ++index)
{
plan.bindings.push_back({
"sourceHistory",
"gSourceHistory" + std::to_string(index),
sourceHistoryTextures[index],
kSourceHistoryTextureUnitBase + static_cast<GLuint>(index)
});
}
const GLuint temporalBase = kSourceHistoryTextureUnitBase + static_cast<GLuint>(sourceHistoryTextures.size());
for (std::size_t index = 0; index < temporalHistoryTextures.size(); ++index)
{
plan.bindings.push_back({
"temporalHistory",
"gTemporalHistory" + std::to_string(index),
temporalHistoryTextures[index],
temporalBase + static_cast<GLuint>(index)
});
}
const GLuint shaderTextureBase = layerProgram.shaderTextureBase != 0 ? layerProgram.shaderTextureBase : kSourceHistoryTextureUnitBase;
for (std::size_t index = 0; index < layerProgram.textureBindings.size(); ++index)
{
const LayerProgram::TextureBinding& textureBinding = layerProgram.textureBindings[index];
plan.bindings.push_back({
"shaderTexture",
textureBinding.samplerName,
textureBinding.texture,
shaderTextureBase + static_cast<GLuint>(index)
});
}
const GLuint textTextureBase = shaderTextureBase + static_cast<GLuint>(layerProgram.textureBindings.size());
for (std::size_t index = 0; index < layerProgram.textBindings.size(); ++index)
{
const LayerProgram::TextBinding& textBinding = layerProgram.textBindings[index];
plan.bindings.push_back({
"textTexture",
textBinding.samplerName,
textBinding.texture,
textTextureBase + static_cast<GLuint>(index)
});
}
return plan;
}
void ShaderTextureBindings::BindRuntimeTexturePlan(const RuntimeTextureBindingPlan& plan) const
{
for (const RuntimeTextureBinding& binding : plan.bindings)
{
glActiveTexture(GL_TEXTURE0 + binding.textureUnit);
glBindTexture(GL_TEXTURE_2D, binding.texture);
}
glActiveTexture(GL_TEXTURE0);
}
void ShaderTextureBindings::UnbindRuntimeTexturePlan(const RuntimeTextureBindingPlan& plan) const
{
for (const RuntimeTextureBinding& binding : plan.bindings)
{
glActiveTexture(GL_TEXTURE0 + binding.textureUnit);
glBindTexture(GL_TEXTURE_2D, 0);
}
glActiveTexture(GL_TEXTURE0);
}

22
apps/LoopThroughWithOpenGLCompositing/gl/shader/ShaderTextureBindings.h
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@@ -11,8 +11,30 @@ class ShaderTextureBindings
public:
using LayerProgram = OpenGLRenderer::LayerProgram;
struct RuntimeTextureBinding
{
std::string semanticName;
std::string samplerName;
GLuint texture = 0;
GLuint textureUnit = 0;
};
struct RuntimeTextureBindingPlan
{
std::vector<RuntimeTextureBinding> bindings;
};
bool LoadTextureAsset(const ShaderTextureAsset& textureAsset, GLuint& textureId, std::string& error);
void CreateTextBindings(const RuntimeRenderState& state, std::vector<LayerProgram::TextBinding>& textBindings);
bool UpdateTextBindingTexture(const RuntimeRenderState& state, LayerProgram::TextBinding& textBinding, std::string& error);
GLint FindSamplerUniformLocation(GLuint program, const std::string& samplerName) const;
GLuint ResolveShaderTextureBase(const RuntimeRenderState& state, unsigned historyCap) const;
void AssignLayerSamplerUniforms(GLuint program, const RuntimeRenderState& state, const LayerProgram& layerProgram, unsigned historyCap) const;
RuntimeTextureBindingPlan BuildLayerRuntimeBindingPlan(
const LayerProgram& layerProgram,
GLuint layerInputTexture,
const std::vector<GLuint>& sourceHistoryTextures,
const std::vector<GLuint>& temporalHistoryTextures) const;
void BindRuntimeTexturePlan(const RuntimeTextureBindingPlan& plan) const;
void UnbindRuntimeTexturePlan(const RuntimeTextureBindingPlan& plan) const;
};