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gl_rasterizer: Add a simple passthrough shader in lieu of shader generation.

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This commit is contained in:
bunnei 2018-03-22 20:00:41 -04:00
parent 7c3a263839
commit f707c2dac4
2 changed files with 68 additions and 5 deletions
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59
src/video_core/renderer_opengl/gl_rasterizer.cpp
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@ -54,6 +54,8 @@ static void SetShaderUniformBlockBindings(GLuint shader) {
}
RasterizerOpenGL::RasterizerOpenGL() {
shader_dirty = true;
has_ARB_buffer_storage = false;
has_ARB_direct_state_access = false;
has_ARB_separate_shader_objects = false;
@ -106,8 +108,6 @@ RasterizerOpenGL::RasterizerOpenGL() {
state.draw.vertex_buffer = stream_buffer->GetHandle();
pipeline.Create();
vs_input_index_min = 0;
vs_input_index_max = 0;
state.draw.program_pipeline = pipeline.handle;
state.draw.shader_program = 0;
state.draw.vertex_array = hw_vao.handle;
@ -233,7 +233,60 @@ bool RasterizerOpenGL::AccelerateDisplay(const void* config, PAddr framebuffer_a
}
void RasterizerOpenGL::SetShader() {
UNIMPLEMENTED();
// TODO(bunnei): The below sets up a static test shader for passing untransformed vertices to
// OpenGL for rendering. This should be removed/replaced when we start emulating Maxwell
// shaders.
static constexpr char vertex_shader[] = R"(
#version 150 core
in vec2 vert_position;
in vec2 vert_tex_coord;
out vec2 frag_tex_coord;
void main() {
// Multiply input position by the rotscale part of the matrix and then manually translate by
// the last column. This is equivalent to using a full 3x3 matrix and expanding the vector
// to `vec3(vert_position.xy, 1.0)`
gl_Position = vec4(mat2(mat3x2(0.0015625f, 0.0, 0.0, -0.0027778, -1.0, 1.0)) * vert_position + mat3x2(0.0015625f, 0.0, 0.0, -0.0027778, -1.0, 1.0)[2], 0.0, 1.0);
frag_tex_coord = vert_tex_coord;
}
)";
static constexpr char fragment_shader[] = R"(
#version 150 core
in vec2 frag_tex_coord;
out vec4 color;
uniform sampler2D color_texture;
void main() {
color = vec4(1.0, 0.0, 0.0, 1.0);
}
)";
if (current_shader) {
return;
}
LOG_ERROR(HW_GPU, "Emulated shaders are not supported! Using a passthrough shader.");
current_shader = &test_shader;
if (has_ARB_separate_shader_objects) {
test_shader.shader.Create(vertex_shader, nullptr, fragment_shader, {}, true);
glActiveShaderProgram(pipeline.handle, test_shader.shader.handle);
} else {
ASSERT_MSG(false, "Unimplemented");
}
state.draw.shader_program = test_shader.shader.handle;
state.Apply();
if (has_ARB_separate_shader_objects) {
state.draw.shader_program = 0;
state.Apply();
}
}
void RasterizerOpenGL::SyncClipEnabled() {

14
src/video_core/renderer_opengl/gl_rasterizer.h
View file

@ -42,6 +42,12 @@ public:
ScreenInfo& screen_info) override;
bool AccelerateDrawBatch(bool is_indexed) override;
/// OpenGL shader generated for a given Maxwell register state
struct MaxwellShader {
/// OpenGL shader resource
OGLShader shader;
};
struct VertexShader {
OGLShader shader;
};
@ -117,6 +123,12 @@ private:
RasterizerCacheOpenGL res_cache;
/// Shader used for test renderering - to be removed once we have emulated shaders
MaxwellShader test_shader{};
const MaxwellShader* current_shader{};
bool shader_dirty{};
struct {
UniformData data;
bool dirty;
@ -136,8 +148,6 @@ private:
static constexpr size_t STREAM_BUFFER_SIZE = 4 * 1024 * 1024;
std::unique_ptr<OGLStreamBuffer> stream_buffer;
GLint vs_input_index_min;
GLint vs_input_index_max;
GLsizeiptr vs_input_size;
void AnalyzeVertexArray(bool is_indexed);