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Fr4nz D13trich 2025-11-22 13:58:55 +01:00
parent 4af19165ec
commit 68073add76
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libs/drape/metal/metal_gpu_program.hpp Normal file
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#pragma once
#import <MetalKit/MetalKit.h>
#include "drape/gpu_program.hpp"
#include <cstdint>
#include <map>
#include <string>
#include <utility>
namespace dp
{
namespace metal
{
class MetalGpuProgram : public GpuProgram
{
public:
static int8_t constexpr kInvalidBindingIndex = -1;
struct TextureBindingInfo
{
int8_t m_textureBindingIndex = kInvalidBindingIndex;
int8_t m_samplerBindingIndex = kInvalidBindingIndex;
};
using TexturesBindingInfo = std::map<std::string, TextureBindingInfo>;
MetalGpuProgram(std::string const & programName, id<MTLFunction> vertexShader, id<MTLFunction> fragmentShader,
int8_t vsUniformsBindingIndex, int8_t fsUniformsBindingIndex,
TexturesBindingInfo && vertexTextureBindingInfo, TexturesBindingInfo && fragmentTextureBindingInfo,
MTLVertexDescriptor * vertexDescriptor)
: GpuProgram(programName)
, m_vertexShader(vertexShader)
, m_fragmentShader(fragmentShader)
, m_vsUniformsBindingIndex(vsUniformsBindingIndex)
, m_fsUniformsBindingIndex(fsUniformsBindingIndex)
, m_vertexTextureBindingInfo(std::move(vertexTextureBindingInfo))
, m_fragmentTextureBindingInfo(std::move(fragmentTextureBindingInfo))
, m_vertexDescriptor(vertexDescriptor)
{}
void Bind() override {}
void Unbind() override {}
id<MTLFunction> GetVertexShader() const { return m_vertexShader; }
id<MTLFunction> GetFragmentShader() const { return m_fragmentShader; }
int8_t GetVertexShaderUniformsBindingIndex() const { return m_vsUniformsBindingIndex; }
int8_t GetFragmentShaderUniformsBindingIndex() const { return m_fsUniformsBindingIndex; }
TextureBindingInfo const & GetVertexTextureBindingInfo(std::string const & textureName) const
{
return GetTextureBindingInfo(m_vertexTextureBindingInfo, textureName);
}
TextureBindingInfo const & GetFragmentTextureBindingInfo(std::string const & textureName) const
{
return GetTextureBindingInfo(m_fragmentTextureBindingInfo, textureName);
}
MTLVertexDescriptor * GetVertexDescriptor() const { return m_vertexDescriptor; }
private:
TextureBindingInfo const & GetTextureBindingInfo(TexturesBindingInfo const & bindingInfo,
std::string const & textureName) const
{
static TextureBindingInfo kEmptyBinding;
auto const it = bindingInfo.find(textureName);
if (it == bindingInfo.cend())
return kEmptyBinding;
return it->second;
}
id<MTLFunction> m_vertexShader;
id<MTLFunction> m_fragmentShader;
int8_t const m_vsUniformsBindingIndex;
int8_t const m_fsUniformsBindingIndex;
TexturesBindingInfo const m_vertexTextureBindingInfo;
TexturesBindingInfo const m_fragmentTextureBindingInfo;
MTLVertexDescriptor * m_vertexDescriptor;
};
} // namespace metal
} // namespace dp