1 files changed, 64 insertions, 0 deletions
diff --git a/src/video_core/renderer_opengl/gl_shader_manager.cpp b/src/video_core/renderer_opengl/gl_shader_manager.cpp
new file mode 100644
index 000000000..17b3925a0
--- /dev/null
+++ b/src/video_core/renderer_opengl/gl_shader_manager.cpp
@@ -0,0 +1,64 @@
+// Copyright 2018 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include "core/core.h"
+#include "core/hle/kernel/process.h"
+#include "video_core/engines/maxwell_3d.h"
+#include "video_core/renderer_opengl/gl_shader_manager.h"
+
+namespace GLShader {
+
+namespace Impl {
+void SetShaderUniformBlockBinding(GLuint shader, const char* name,
+                                  Maxwell3D::Regs::ShaderStage binding, size_t expected_size) {
+    GLuint ub_index = glGetUniformBlockIndex(shader, name);
+    if (ub_index != GL_INVALID_INDEX) {
+        GLint ub_size = 0;
+        glGetActiveUniformBlockiv(shader, ub_index, GL_UNIFORM_BLOCK_DATA_SIZE, &ub_size);
+        ASSERT_MSG(ub_size == expected_size,
+                   "Uniform block size did not match! Got %d, expected %zu",
+                   static_cast<int>(ub_size), expected_size);
+        glUniformBlockBinding(shader, ub_index, static_cast<GLuint>(binding));
+    }
+}
+
+void SetShaderUniformBlockBindings(GLuint shader) {
+    SetShaderUniformBlockBinding(shader, "vs_config", Maxwell3D::Regs::ShaderStage::Vertex,
+                                 sizeof(MaxwellUniformData));
+    SetShaderUniformBlockBinding(shader, "gs_config", Maxwell3D::Regs::ShaderStage::Geometry,
+                                 sizeof(MaxwellUniformData));
+    SetShaderUniformBlockBinding(shader, "fs_config", Maxwell3D::Regs::ShaderStage::Fragment,
+                                 sizeof(MaxwellUniformData));
+}
+
+void SetShaderSamplerBindings(GLuint shader) {
+    OpenGLState cur_state = OpenGLState::GetCurState();
+    GLuint old_program = std::exchange(cur_state.draw.shader_program, shader);
+    cur_state.Apply();
+
+    // Set the texture samplers to correspond to different texture units
+    for (u32 texture = 0; texture < NumTextureSamplers; ++texture) {
+        // Set the texture samplers to correspond to different texture units
+        std::string uniform_name = "tex[" + std::to_string(texture) + "]";
+        GLint uniform_tex = glGetUniformLocation(shader, uniform_name.c_str());
+        if (uniform_tex != -1) {
+            glUniform1i(uniform_tex, TextureUnits::MaxwellTexture(texture).id);
+        }
+    }
+
+    cur_state.draw.shader_program = old_program;
+    cur_state.Apply();
+}
+
+} // namespace Impl
+
+void MaxwellUniformData::SetFromRegs(const Maxwell3D::State::ShaderStageInfo& shader_stage) {
+    const auto& regs = Core::System().GetInstance().GPU().Maxwell3D().regs;
+
+    // TODO(bunnei): Support more than one viewport
+    viewport_flip[0] = regs.viewport_transform[0].scale_x < 0.0 ? -1.0 : 1.0;
+    viewport_flip[1] = regs.viewport_transform[0].scale_y < 0.0 ? -1.0 : 1.0;
+}
+
+} // namespace GLShader