diff options
Diffstat (limited to '')
-rw-r--r-- | src/video_core/renderer_opengl/gl_graphics_program.cpp | 90 |
1 files changed, 88 insertions, 2 deletions
diff --git a/src/video_core/renderer_opengl/gl_graphics_program.cpp b/src/video_core/renderer_opengl/gl_graphics_program.cpp index b5d75aa13..9677a3ed6 100644 --- a/src/video_core/renderer_opengl/gl_graphics_program.cpp +++ b/src/video_core/renderer_opengl/gl_graphics_program.cpp @@ -12,7 +12,7 @@ #include "video_core/texture_cache/texture_cache.h" namespace OpenGL { - +namespace { using Shader::ImageBufferDescriptor; using Tegra::Texture::TexturePair; using VideoCommon::ImageId; @@ -20,6 +20,35 @@ using VideoCommon::ImageId; constexpr u32 MAX_TEXTURES = 64; constexpr u32 MAX_IMAGES = 8; +/// Translates hardware transform feedback indices +/// @param location Hardware location +/// @return Pair of ARB_transform_feedback3 token stream first and third arguments +/// @note Read https://www.khronos.org/registry/OpenGL/extensions/ARB/ARB_transform_feedback3.txt +std::pair<GLint, GLint> TransformFeedbackEnum(u8 location) { + const u8 index = location / 4; + if (index >= 8 && index <= 39) { + return {GL_GENERIC_ATTRIB_NV, index - 8}; + } + if (index >= 48 && index <= 55) { + return {GL_TEXTURE_COORD_NV, index - 48}; + } + switch (index) { + case 7: + return {GL_POSITION, 0}; + case 40: + return {GL_PRIMARY_COLOR_NV, 0}; + case 41: + return {GL_SECONDARY_COLOR_NV, 0}; + case 42: + return {GL_BACK_PRIMARY_COLOR_NV, 0}; + case 43: + return {GL_BACK_SECONDARY_COLOR_NV, 0}; + } + UNIMPLEMENTED_MSG("index={}", index); + return {GL_POSITION, 0}; +} +} // Anonymous namespace + size_t GraphicsProgramKey::Hash() const noexcept { return static_cast<size_t>(Common::CityHash64(reinterpret_cast<const char*>(this), Size())); } @@ -34,7 +63,8 @@ GraphicsProgram::GraphicsProgram(TextureCache& texture_cache_, BufferCache& buff ProgramManager& program_manager_, StateTracker& state_tracker_, OGLProgram program_, std::array<OGLAssemblyProgram, 5> assembly_programs_, - const std::array<const Shader::Info*, 5>& infos) + const std::array<const Shader::Info*, 5>& infos, + const VideoCommon::TransformFeedbackState* xfb_state) : texture_cache{texture_cache_}, buffer_cache{buffer_cache_}, gpu_memory{gpu_memory_}, maxwell3d{maxwell3d_}, program_manager{program_manager_}, state_tracker{state_tracker_}, program{std::move(program_)}, assembly_programs{std::move( @@ -74,6 +104,10 @@ GraphicsProgram::GraphicsProgram(TextureCache& texture_cache_, BufferCache& buff } ASSERT(num_textures <= MAX_TEXTURES); ASSERT(num_images <= MAX_IMAGES); + + if (assembly_programs[0].handle != 0 && xfb_state) { + GenerateTransformFeedbackState(*xfb_state); + } } struct Spec { @@ -302,4 +336,56 @@ void GraphicsProgram::Configure(bool is_indexed) { } } +void GraphicsProgram::GenerateTransformFeedbackState( + const VideoCommon::TransformFeedbackState& xfb_state) { + // TODO(Rodrigo): Inject SKIP_COMPONENTS*_NV when required. An unimplemented message will signal + // when this is required. + const auto& regs{maxwell3d.regs}; + + GLint* cursor{xfb_attribs.data()}; + GLint* current_stream{xfb_streams.data()}; + + for (size_t feedback = 0; feedback < Maxwell::NumTransformFeedbackBuffers; ++feedback) { + const auto& layout = regs.tfb_layouts[feedback]; + UNIMPLEMENTED_IF_MSG(layout.stride != layout.varying_count * 4, "Stride padding"); + if (layout.varying_count == 0) { + continue; + } + *current_stream = static_cast<GLint>(feedback); + if (current_stream != xfb_streams.data()) { + // When stepping one stream, push the expected token + cursor[0] = GL_NEXT_BUFFER_NV; + cursor[1] = 0; + cursor[2] = 0; + cursor += XFB_ENTRY_STRIDE; + } + ++current_stream; + + const auto& locations = regs.tfb_varying_locs[feedback]; + std::optional<u8> current_index; + for (u32 offset = 0; offset < layout.varying_count; ++offset) { + const u8 location = locations[offset]; + const u8 index = location / 4; + + if (current_index == index) { + // Increase number of components of the previous attachment + ++cursor[-2]; + continue; + } + current_index = index; + + std::tie(cursor[0], cursor[2]) = TransformFeedbackEnum(location); + cursor[1] = 1; + cursor += XFB_ENTRY_STRIDE; + } + } + num_xfb_attribs = static_cast<GLsizei>((cursor - xfb_attribs.data()) / XFB_ENTRY_STRIDE); + num_xfb_strides = static_cast<GLsizei>(current_stream - xfb_streams.data()); +} + +void GraphicsProgram::ConfigureTransformFeedbackImpl() const { + glTransformFeedbackStreamAttribsNV(num_xfb_attribs, xfb_attribs.data(), num_xfb_strides, + xfb_streams.data(), GL_INTERLEAVED_ATTRIBS); +} + } // namespace OpenGL |