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-rw-r--r--src/video_core/renderer_opengl/gl_rasterizer.cpp28
-rw-r--r--src/video_core/renderer_opengl/gl_rasterizer.h5
-rw-r--r--src/video_core/renderer_opengl/gl_shader_decompiler.cpp22
-rw-r--r--src/video_core/renderer_opengl/gl_state.cpp2
4 files changed, 39 insertions, 18 deletions
diff --git a/src/video_core/renderer_opengl/gl_rasterizer.cpp b/src/video_core/renderer_opengl/gl_rasterizer.cpp
index 6f05f24a0..e04966849 100644
--- a/src/video_core/renderer_opengl/gl_rasterizer.cpp
+++ b/src/video_core/renderer_opengl/gl_rasterizer.cpp
@@ -197,8 +197,8 @@ void RasterizerOpenGL::SetupShaders(u8* buffer_ptr, GLintptr buffer_offset) {
ASSERT_MSG(!gpu.regs.shader_config[0].enable, "VertexA is unsupported!");
// Next available bindpoints to use when uploading the const buffers and textures to the GLSL
- // shaders.
- u32 current_constbuffer_bindpoint = 0;
+ // shaders. The constbuffer bindpoint starts after the shader stage configuration bind points.
+ u32 current_constbuffer_bindpoint = uniform_buffers.size();
u32 current_texture_bindpoint = 0;
for (unsigned index = 1; index < Maxwell::MaxShaderProgram; ++index) {
@@ -608,27 +608,33 @@ u32 RasterizerOpenGL::SetupConstBuffers(Maxwell::ShaderStage stage, GLuint progr
boost::optional<VAddr> addr = gpu.memory_manager->GpuToCpuAddress(buffer.address);
- std::vector<u8> data;
+ size_t size = 0;
+
if (used_buffer.IsIndirect()) {
// Buffer is accessed indirectly, so upload the entire thing
- data.resize(buffer.size * sizeof(float));
+ size = buffer.size * sizeof(float);
} else {
// Buffer is accessed directly, upload just what we use
- data.resize(used_buffer.GetSize() * sizeof(float));
+ size = used_buffer.GetSize() * sizeof(float);
}
+ // Align the actual size so it ends up being a multiple of vec4 to meet the OpenGL std140
+ // UBO alignment requirements.
+ size = Common::AlignUp(size, sizeof(GLvec4));
+ ASSERT_MSG(size <= MaxConstbufferSize, "Constbuffer too big");
+
+ std::vector<u8> data(size);
Memory::ReadBlock(*addr, data.data(), data.size());
- glBindBuffer(GL_SHADER_STORAGE_BUFFER, buffer_draw_state.ssbo);
- glBufferData(GL_SHADER_STORAGE_BUFFER, data.size(), data.data(), GL_DYNAMIC_DRAW);
- glBindBuffer(GL_SHADER_STORAGE_BUFFER, 0);
+ glBindBuffer(GL_UNIFORM_BUFFER, buffer_draw_state.ssbo);
+ glBufferData(GL_UNIFORM_BUFFER, data.size(), data.data(), GL_DYNAMIC_DRAW);
+ glBindBuffer(GL_UNIFORM_BUFFER, 0);
// Now configure the bindpoint of the buffer inside the shader
std::string buffer_name = used_buffer.GetName();
- GLuint index =
- glGetProgramResourceIndex(program, GL_SHADER_STORAGE_BLOCK, buffer_name.c_str());
+ GLuint index = glGetProgramResourceIndex(program, GL_UNIFORM_BLOCK, buffer_name.c_str());
if (index != -1)
- glShaderStorageBlockBinding(program, index, buffer_draw_state.bindpoint);
+ glUniformBlockBinding(program, index, buffer_draw_state.bindpoint);
}
state.Apply();
diff --git a/src/video_core/renderer_opengl/gl_rasterizer.h b/src/video_core/renderer_opengl/gl_rasterizer.h
index b7c8cf843..2ab066681 100644
--- a/src/video_core/renderer_opengl/gl_rasterizer.h
+++ b/src/video_core/renderer_opengl/gl_rasterizer.h
@@ -54,6 +54,11 @@ public:
OGLShader shader;
};
+ /// Maximum supported size that a constbuffer can have in bytes.
+ static constexpr size_t MaxConstbufferSize = 0x1000;
+ static_assert(MaxConstbufferSize % sizeof(GLvec4) == 0,
+ "The maximum size of a constbuffer must be a multiple of the size of GLvec4");
+
private:
class SamplerInfo {
public:
diff --git a/src/video_core/renderer_opengl/gl_shader_decompiler.cpp b/src/video_core/renderer_opengl/gl_shader_decompiler.cpp
index 37fbb94da..87ae47ac9 100644
--- a/src/video_core/renderer_opengl/gl_shader_decompiler.cpp
+++ b/src/video_core/renderer_opengl/gl_shader_decompiler.cpp
@@ -9,6 +9,7 @@
#include "common/assert.h"
#include "common/common_types.h"
#include "video_core/engines/shader_bytecode.h"
+#include "video_core/renderer_opengl/gl_rasterizer.h"
#include "video_core/renderer_opengl/gl_shader_decompiler.h"
namespace GLShader {
@@ -366,7 +367,8 @@ public:
/// Generates code representing a uniform (C buffer) register, interpreted as the input type.
std::string GetUniform(u64 index, u64 offset, GLSLRegister::Type type) {
declr_const_buffers[index].MarkAsUsed(index, offset, stage);
- std::string value = 'c' + std::to_string(index) + '[' + std::to_string(offset) + ']';
+ std::string value = 'c' + std::to_string(index) + '[' + std::to_string(offset / 4) + "][" +
+ std::to_string(offset % 4) + ']';
if (type == GLSLRegister::Type::Float) {
return value;
@@ -380,8 +382,12 @@ public:
std::string GetUniformIndirect(u64 index, s64 offset, const Register& index_reg,
GLSLRegister::Type type) {
declr_const_buffers[index].MarkAsUsedIndirect(index, stage);
- std::string value = 'c' + std::to_string(index) + "[(floatBitsToInt(" +
- GetRegister(index_reg, 0) + ") + " + std::to_string(offset) + ") / 4]";
+
+ std::string final_offset = "((floatBitsToInt(" + GetRegister(index_reg, 0) + ") + " +
+ std::to_string(offset) + ") / 4)";
+
+ std::string value =
+ 'c' + std::to_string(index) + '[' + final_offset + " / 4][" + final_offset + " % 4]";
if (type == GLSLRegister::Type::Float) {
return value;
@@ -423,9 +429,10 @@ public:
unsigned const_buffer_layout = 0;
for (const auto& entry : GetConstBuffersDeclarations()) {
- declarations.AddLine("layout(std430) buffer " + entry.GetName());
+ declarations.AddLine("layout(std140) uniform " + entry.GetName());
declarations.AddLine('{');
- declarations.AddLine(" float c" + std::to_string(entry.GetIndex()) + "[];");
+ declarations.AddLine(" vec4 c" + std::to_string(entry.GetIndex()) +
+ "[MAX_CONSTBUFFER_ELEMENTS];");
declarations.AddLine("};");
declarations.AddNewLine();
++const_buffer_layout;
@@ -1611,7 +1618,10 @@ private:
}; // namespace Decompiler
std::string GetCommonDeclarations() {
- return "bool exec_shader();";
+ std::string declarations = "bool exec_shader();\n";
+ declarations += "#define MAX_CONSTBUFFER_ELEMENTS " +
+ std::to_string(RasterizerOpenGL::MaxConstbufferSize / (sizeof(GLvec4)));
+ return declarations;
}
boost::optional<ProgramResult> DecompileProgram(const ProgramCode& program_code, u32 main_offset,
diff --git a/src/video_core/renderer_opengl/gl_state.cpp b/src/video_core/renderer_opengl/gl_state.cpp
index 44f0c8a01..443ce3f2b 100644
--- a/src/video_core/renderer_opengl/gl_state.cpp
+++ b/src/video_core/renderer_opengl/gl_state.cpp
@@ -223,7 +223,7 @@ void OpenGLState::Apply() const {
if (current.enabled != new_state.enabled || current.bindpoint != new_state.bindpoint ||
current.ssbo != new_state.ssbo) {
if (new_state.enabled) {
- glBindBufferBase(GL_SHADER_STORAGE_BUFFER, new_state.bindpoint, new_state.ssbo);
+ glBindBufferBase(GL_UNIFORM_BUFFER, new_state.bindpoint, new_state.ssbo);
}
}
}
generated by cgit v1.2.3 (git 2.25.1) at 2024-10-31 17:58:19 +0100