VideoCore: Fixes rendering issues on Qt and corrects framebuffer output size.

src/video_core/clipper.cpp

@@ -92,7 +92,7 @@ static void InitScreenCoordinates(OutputVertex& vtx)
     viewport.offset_z   = float24::FromRawFloat24(registers.viewport_depth_far_plane);
 
     // TODO: Not sure why the viewport width needs to be divided by 2 but the viewport height does not
-    vtx.screenpos[0] = (vtx.pos.x / vtx.pos.w + float24::FromFloat32(1.0)) * viewport.halfsize_x / float24::FromFloat32(2.0) + viewport.offset_x;
+    vtx.screenpos[0] = (vtx.pos.x / vtx.pos.w + float24::FromFloat32(1.0)) * viewport.halfsize_x + viewport.offset_x;
     vtx.screenpos[1] = (vtx.pos.y / vtx.pos.w + float24::FromFloat32(1.0)) * viewport.halfsize_y + viewport.offset_y;
     vtx.screenpos[2] = viewport.offset_z - vtx.pos.z / vtx.pos.w * viewport.zscale;
 }

src/video_core/rasterizer.cpp

@@ -22,21 +22,21 @@ static void DrawPixel(int x, int y, const Math::Vec4<u8>& color) {
     u32 value = (color.a() << 24) | (color.r() << 16) | (color.g() << 8) | color.b();
 
     // Assuming RGBA8 format until actual framebuffer format handling is implemented
-    *(color_buffer + x + y * registers.framebuffer.GetWidth() / 2) = value;
+    *(color_buffer + x + y * registers.framebuffer.GetWidth()) = value;
 }
 
 static u32 GetDepth(int x, int y) {
     u16* depth_buffer = (u16*)Memory::GetPointer(registers.framebuffer.GetDepthBufferAddress());
 
     // Assuming 16-bit depth buffer format until actual format handling is implemented
-    return *(depth_buffer + x + y * registers.framebuffer.GetWidth() / 2);
+    return *(depth_buffer + x + y * registers.framebuffer.GetWidth());
 }
 
 static void SetDepth(int x, int y, u16 value) {
     u16* depth_buffer = (u16*)Memory::GetPointer(registers.framebuffer.GetDepthBufferAddress());
 
     // Assuming 16-bit depth buffer format until actual format handling is implemented
-    *(depth_buffer + x + y * registers.framebuffer.GetWidth() / 2) = value;
+    *(depth_buffer + x + y * registers.framebuffer.GetWidth()) = value;
 }
 
 void ProcessTriangle(const VertexShader::OutputVertex& v0,

src/video_core/renderer_opengl/renderer_opengl.cpp

@@ -49,12 +49,17 @@ RendererOpenGL::RendererOpenGL() {
     resolution_height = VideoCore::kScreenTopHeight + VideoCore::kScreenBottomHeight;
 
     // Initialize screen info
-    screen_info.Top().width            = VideoCore::kScreenTopWidth;
-    screen_info.Top().height           = VideoCore::kScreenTopHeight;
-    screen_info.Top().flipped_xfb_data = xfb_top_flipped;
+    const auto& framebuffer_top = GPU::g_regs.framebuffer_config[0];
+    const auto& framebuffer_sub = GPU::g_regs.framebuffer_config[1];
+
+    screen_info.Top().width               = VideoCore::kScreenTopWidth;
+    screen_info.Top().height              = VideoCore::kScreenTopHeight;
+    screen_info.Top().stride              = framebuffer_top.stride;
+    screen_info.Top().flipped_xfb_data    = xfb_top_flipped;
 
     screen_info.Bottom().width            = VideoCore::kScreenBottomWidth;
     screen_info.Bottom().height           = VideoCore::kScreenBottomHeight;
+    screen_info.Bottom().stride           = framebuffer_sub.stride;
     screen_info.Bottom().flipped_xfb_data = xfb_bottom_flipped;
 }
 
@@ -90,8 +95,8 @@ void RendererOpenGL::SwapBuffers() {
  * @todo Early on hack... I'd like to find a more efficient way of doing this /bunnei
  */
 void RendererOpenGL::FlipFramebuffer(const u8* raw_data, ScreenInfo& screen_info) {
-    int in_coord = 0;
     for (int x = 0; x < screen_info.width; x++) {
+        int in_coord = x * screen_info.stride;
         for (int y = screen_info.height-1; y >= 0; y--) {
             // TODO: Properly support other framebuffer formats
             int out_coord = (x + y * screen_info.width) * 3;
@@ -184,6 +189,7 @@ void RendererOpenGL::InitFramebuffer() {
 }
 
 void RendererOpenGL::RenderFramebuffer() {
+    glViewport(0, 0, resolution_width, resolution_height);
     glClear(GL_COLOR_BUFFER_BIT);
 
     glUseProgram(program_id);

src/video_core/renderer_opengl/renderer_opengl.h

@@ -57,6 +57,7 @@ private:
         // Properties
         int width;
         int height;
+        int stride; ///< Number of bytes between the coordinates (0,0) and (1,0)
 
         // OpenGL object IDs
         GLuint texture_id;