From 0162a2d5cbfb0e0df7f99187a87c031416fd79cc Mon Sep 17 00:00:00 2001
From: bunnei <bunneidev@gmail.com>
Date: Sat, 24 Mar 2018 03:59:51 -0400
Subject: [PATCH] gl_rasterizer: Implement DrawTriangles.
---
.../renderer_opengl/gl_rasterizer.cpp | 195 +++++++++++++++++-
1 file changed, 194 insertions(+), 1 deletion(-)
diff --git a/src/video_core/renderer_opengl/gl_rasterizer.cpp b/src/video_core/renderer_opengl/gl_rasterizer.cpp
index 982e84768..c44ce4a18 100644
--- a/src/video_core/renderer_opengl/gl_rasterizer.cpp
+++ b/src/video_core/renderer_opengl/gl_rasterizer.cpp
@@ -197,8 +197,201 @@ bool RasterizerOpenGL::AccelerateDrawBatch(bool is_indexed) {
}
void RasterizerOpenGL::DrawTriangles() {
+ if (accelerate_draw == AccelDraw::Disabled)
+ return;
+
MICROPROFILE_SCOPE(OpenGL_Drawing);
- UNIMPLEMENTED();
+ const auto& regs = Core::System().GetInstance().GPU().Maxwell3D().regs;
+
+ // TODO(bunnei): Implement these
+ const bool has_stencil = false;
+ const bool using_color_fb = true;
+ const bool using_depth_fb = false;
+
+ MathUtil::Rectangle<s32> viewport_rect_unscaled{
+ static_cast<s32>(regs.viewport[0].x), // left
+ static_cast<s32>(regs.viewport[0].y + regs.viewport[0].height), // top
+ static_cast<s32>(regs.viewport[0].x + regs.viewport[0].width), // right
+ static_cast<s32>(regs.viewport[0].y) // bottom
+ };
+
+ const bool write_color_fb =
+ state.color_mask.red_enabled == GL_TRUE || state.color_mask.green_enabled == GL_TRUE ||
+ state.color_mask.blue_enabled == GL_TRUE || state.color_mask.alpha_enabled == GL_TRUE;
+
+ const bool write_depth_fb =
+ (state.depth.test_enabled && state.depth.write_mask == GL_TRUE) ||
+ (has_stencil && state.stencil.test_enabled && state.stencil.write_mask != 0);
+
+ Surface color_surface;
+ Surface depth_surface;
+ MathUtil::Rectangle<u32> surfaces_rect;
+ std::tie(color_surface, depth_surface, surfaces_rect) =
+ res_cache.GetFramebufferSurfaces(using_color_fb, using_depth_fb, viewport_rect_unscaled);
+
+ const u16 res_scale = color_surface != nullptr
+ ? color_surface->res_scale
+ : (depth_surface == nullptr ? 1u : depth_surface->res_scale);
+
+ MathUtil::Rectangle<u32> draw_rect{
+ static_cast<u32>(MathUtil::Clamp<s32>(static_cast<s32>(surfaces_rect.left) +
+ viewport_rect_unscaled.left * res_scale,
+ surfaces_rect.left, surfaces_rect.right)), // Left
+ static_cast<u32>(MathUtil::Clamp<s32>(static_cast<s32>(surfaces_rect.bottom) +
+ viewport_rect_unscaled.top * res_scale,
+ surfaces_rect.bottom, surfaces_rect.top)), // Top
+ static_cast<u32>(MathUtil::Clamp<s32>(static_cast<s32>(surfaces_rect.left) +
+ viewport_rect_unscaled.right * res_scale,
+ surfaces_rect.left, surfaces_rect.right)), // Right
+ static_cast<u32>(MathUtil::Clamp<s32>(static_cast<s32>(surfaces_rect.bottom) +
+ viewport_rect_unscaled.bottom * res_scale,
+ surfaces_rect.bottom, surfaces_rect.top))}; // Bottom
+
+ // Bind the framebuffer surfaces
+ state.draw.draw_framebuffer = framebuffer.handle;
+ state.Apply();
+
+ glFramebufferTexture2D(GL_DRAW_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D,
+ color_surface != nullptr ? color_surface->texture.handle : 0, 0);
+ if (depth_surface != nullptr) {
+ if (has_stencil) {
+ // attach both depth and stencil
+ glFramebufferTexture2D(GL_DRAW_FRAMEBUFFER, GL_DEPTH_STENCIL_ATTACHMENT, GL_TEXTURE_2D,
+ depth_surface->texture.handle, 0);
+ } else {
+ // attach depth
+ glFramebufferTexture2D(GL_DRAW_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_TEXTURE_2D,
+ depth_surface->texture.handle, 0);
+ // clear stencil attachment
+ glFramebufferTexture2D(GL_DRAW_FRAMEBUFFER, GL_STENCIL_ATTACHMENT, GL_TEXTURE_2D, 0, 0);
+ }
+ } else {
+ // clear both depth and stencil attachment
+ glFramebufferTexture2D(GL_DRAW_FRAMEBUFFER, GL_DEPTH_STENCIL_ATTACHMENT, GL_TEXTURE_2D, 0,
+ 0);
+ }
+
+ // Sync the viewport
+ state.viewport.x =
+ static_cast<GLint>(surfaces_rect.left) + viewport_rect_unscaled.left * res_scale;
+ state.viewport.y =
+ static_cast<GLint>(surfaces_rect.bottom) + viewport_rect_unscaled.bottom * res_scale;
+ state.viewport.width = static_cast<GLsizei>(viewport_rect_unscaled.GetWidth() * res_scale);
+ state.viewport.height = static_cast<GLsizei>(viewport_rect_unscaled.GetHeight() * res_scale);
+
+ // TODO(bunnei): Sync framebuffer_scale uniform here
+ // TODO(bunnei): Sync scissorbox uniform(s) here
+ // TODO(bunnei): Sync and bind the texture surfaces
+
+ // Sync and bind the shader
+ if (shader_dirty) {
+ SetShader();
+ shader_dirty = false;
+ }
+
+ // Sync the uniform data
+ if (uniform_block_data.dirty) {
+ glBufferSubData(GL_UNIFORM_BUFFER, 0, sizeof(UniformData), &uniform_block_data.data);
+ uniform_block_data.dirty = false;
+ }
+
+ // Viewport can have negative offsets or larger dimensions than our framebuffer sub-rect. Enable
+ // scissor test to prevent drawing outside of the framebuffer region
+ state.scissor.enabled = true;
+ state.scissor.x = draw_rect.left;
+ state.scissor.y = draw_rect.bottom;
+ state.scissor.width = draw_rect.GetWidth();
+ state.scissor.height = draw_rect.GetHeight();
+ state.Apply();
+
+ // Draw the vertex batch
+ GLenum primitive_mode;
+ switch (regs.draw.topology) {
+ case Maxwell::PrimitiveTopology::TriangleStrip:
+ primitive_mode = GL_TRIANGLE_STRIP;
+ break;
+ default:
+ UNREACHABLE();
+ }
+
+ const bool is_indexed = accelerate_draw == AccelDraw::Indexed;
+
+ AnalyzeVertexArray(is_indexed);
+ state.draw.vertex_buffer = stream_buffer->GetHandle();
+ state.Apply();
+
+ size_t buffer_size = static_cast<size_t>(vs_input_size);
+ if (is_indexed) {
+ UNREACHABLE();
+ }
+ buffer_size += sizeof(VSUniformData);
+
+ size_t ptr_pos = 0;
+ u8* buffer_ptr;
+ GLintptr buffer_offset;
+ std::tie(buffer_ptr, buffer_offset) =
+ stream_buffer->Map(static_cast<GLsizeiptr>(buffer_size), 4);
+
+ SetupVertexArray(buffer_ptr, buffer_offset);
+ ptr_pos += vs_input_size;
+
+ GLintptr index_buffer_offset = 0;
+ if (is_indexed) {
+ UNREACHABLE();
+ }
+
+ SetupVertexShader(reinterpret_cast<VSUniformData*>(&buffer_ptr[ptr_pos]),
+ buffer_offset + static_cast<GLintptr>(ptr_pos));
+ const GLintptr vs_ubo_offset = buffer_offset + static_cast<GLintptr>(ptr_pos);
+ ptr_pos += sizeof(VSUniformData);
+
+ stream_buffer->Unmap();
+
+ const auto copy_buffer = [&](GLuint handle, GLintptr offset, GLsizeiptr size) {
+ if (has_ARB_direct_state_access) {
+ glCopyNamedBufferSubData(stream_buffer->GetHandle(), handle, offset, 0, size);
+ } else {
+ glBindBuffer(GL_COPY_WRITE_BUFFER, handle);
+ glCopyBufferSubData(GL_ARRAY_BUFFER, GL_COPY_WRITE_BUFFER, offset, 0, size);
+ }
+ };
+
+ copy_buffer(vs_uniform_buffer.handle, vs_ubo_offset, sizeof(VSUniformData));
+
+ glUseProgramStages(pipeline.handle, GL_FRAGMENT_SHADER_BIT, current_shader->shader.handle);
+
+ if (is_indexed) {
+ UNREACHABLE();
+ } else {
+ glDrawArrays(primitive_mode, 0, regs.vertex_buffer.count);
+ }
+
+ // Disable scissor test
+ state.scissor.enabled = false;
+
+ accelerate_draw = AccelDraw::Disabled;
+
+ // Unbind textures for potential future use as framebuffer attachments
+ for (auto& texture_unit : state.texture_units) {
+ texture_unit.texture_2d = 0;
+ }
+ state.Apply();
+
+ // Mark framebuffer surfaces as dirty
+ MathUtil::Rectangle<u32> draw_rect_unscaled{
+ draw_rect.left / res_scale, draw_rect.top / res_scale, draw_rect.right / res_scale,
+ draw_rect.bottom / res_scale};
+
+ if (color_surface != nullptr && write_color_fb) {
+ auto interval = color_surface->GetSubRectInterval(draw_rect_unscaled);
+ res_cache.InvalidateRegion(boost::icl::first(interval), boost::icl::length(interval),
+ color_surface);
+ }
+ if (depth_surface != nullptr && write_depth_fb) {
+ auto interval = depth_surface->GetSubRectInterval(draw_rect_unscaled);
+ res_cache.InvalidateRegion(boost::icl::first(interval), boost::icl::length(interval),
+ depth_surface);
+ }
}
void RasterizerOpenGL::NotifyMaxwellRegisterChanged(u32 id) {}