Implement dithering where relevant

miniwin/src/d3drm/backends/citro3d/renderer.cpp

@@ -600,6 +600,10 @@ void Citro3DRenderer::Draw2DImage(Uint32 textureId, const SDL_Rect& srcRect, con
 	C3D_ImmDrawEnd();
 }
 
+void Citro3DRenderer::SetDither(bool dither)
+{
+}
+
 void Citro3DRenderer::Download(SDL_Surface* target)
 {
 	MINIWIN_NOT_IMPLEMENTED();

miniwin/src/d3drm/backends/directx9/renderer.cpp

@@ -278,6 +278,10 @@ void DirectX9Renderer::Draw2DImage(Uint32 textureId, const SDL_Rect& srcRect, co
 	Actual_Draw2DImage(m_textures[textureId].dxTexture, srcRect, dstRect);
 }
 
+void DirectX9Renderer::SetDither(bool dither)
+{
+}
+
 void DirectX9Renderer::Download(SDL_Surface* target)
 {
 	Actual_Download(target);

miniwin/src/d3drm/backends/opengl1/actual.cpp

@@ -357,3 +357,13 @@ void GL11_Download(SDL_Surface* target)
 	glFinish();
 	glReadPixels(0, 0, target->w, target->h, GL_RGBA, GL_UNSIGNED_BYTE, target->pixels);
 }
+
+void GL11_SetDither(bool dither)
+{
+	if (dither) {
+		glEnable(GL_DITHER);
+	}
+	else {
+		glDisable(GL_DITHER);
+	}
+}

miniwin/src/d3drm/backends/opengl1/actual.h

@@ -87,4 +87,5 @@ void GL11_Draw2DImage(
 	float bottom,
 	float top
 );
+void GL11_SetDither(bool dither);
 void GL11_Download(SDL_Surface* target);

miniwin/src/d3drm/backends/opengl1/renderer.cpp

@@ -384,6 +384,11 @@ void OpenGL1Renderer::Draw2DImage(Uint32 textureId, const SDL_Rect& srcRect, con
 	GL11_Draw2DImage(m_textures[textureId], srcRect, dstRect, left, right, bottom, top);
 }
 
+void OpenGL1Renderer::SetDither(bool dither)
+{
+	GL11_SetDither(dither);
+}
+
 void OpenGL1Renderer::Download(SDL_Surface* target)
 {
 	GL11_Download(m_renderedImage);

miniwin/src/d3drm/backends/opengles2/renderer.cpp

@@ -706,3 +706,13 @@ void OpenGLES2Renderer::Download(SDL_Surface* target)
 
 	SDL_DestroySurface(bufferClone);
 }
+
+void OpenGLES2Renderer::SetDither(bool dither)
+{
+	if (dither) {
+		glEnable(GL_DITHER);
+	}
+	else {
+		glDisable(GL_DITHER);
+	}
+}

miniwin/src/d3drm/backends/sdl3gpu/renderer.cpp

@@ -942,6 +942,10 @@ void Direct3DRMSDL3GPURenderer::Draw2DImage(Uint32 textureId, const SDL_Rect& sr
 	SDL_SetGPUScissor(m_renderPass, &fullViewport);
 }
 
+void Direct3DRMSDL3GPURenderer::SetDither(bool dither)
+{
+}
+
 void Direct3DRMSDL3GPURenderer::Download(SDL_Surface* target)
 {
 	if (!m_cmdbuf) {

miniwin/src/d3drm/backends/software/renderer.cpp

@@ -788,6 +788,10 @@ void Direct3DRMSoftwareRenderer::Draw2DImage(Uint32 textureId, const SDL_Rect& s
 	SDL_LockSurface(surface);
 }
 
+void Direct3DRMSoftwareRenderer::SetDither(bool dither)
+{
+}
+
 void Direct3DRMSoftwareRenderer::Download(SDL_Surface* target)
 {
 	SDL_Rect srcRect = {

miniwin/src/d3drm/d3drmdevice.cpp

@@ -84,9 +84,7 @@ D3DRMRENDERQUALITY Direct3DRMDevice2Impl::GetQuality()
 
 HRESULT Direct3DRMDevice2Impl::SetDither(BOOL dither)
 {
-	if (dither) {
+	m_renderer->SetDither(dither);
-		MINIWIN_NOT_IMPLEMENTED();
-	}
 	return DD_OK;
 }
 

miniwin/src/internal/d3drmrenderer.h

@@ -53,6 +53,7 @@ class Direct3DRMRenderer : public IDirect3DDevice2 {
 	virtual void Flip() = 0;
 	virtual void Draw2DImage(Uint32 textureId, const SDL_Rect& srcRect, const SDL_Rect& dstRect) = 0;
 	virtual void Download(SDL_Surface* target) = 0;
+	virtual void SetDither(bool dither) = 0;
 
 protected:
 	int m_width, m_height;

miniwin/src/internal/d3drmrenderer_citro3d.h

@@ -50,6 +50,7 @@ class Citro3DRenderer : public Direct3DRMRenderer {
 	void Flip() override;
 	void Draw2DImage(Uint32 textureId, const SDL_Rect& srcRect, const SDL_Rect& dstRect) override;
 	void Download(SDL_Surface* target) override;
+	void SetDither(bool dither) override;
 
 private:
 	void AddTextureDestroyCallback(Uint32 id, IDirect3DRMTexture* texture);

miniwin/src/internal/d3drmrenderer_directx9.h

@@ -36,6 +36,7 @@ class DirectX9Renderer : public Direct3DRMRenderer {
 	void Flip() override;
 	void Draw2DImage(Uint32 textureId, const SDL_Rect& srcRect, const SDL_Rect& dstRect) override;
 	void Download(SDL_Surface* target) override;
+	void SetDither(bool dither) override;
 
 private:
 	void AddTextureDestroyCallback(Uint32 id, IDirect3DRMTexture* texture);

miniwin/src/internal/d3drmrenderer_opengl1.h

@@ -36,6 +36,7 @@ class OpenGL1Renderer : public Direct3DRMRenderer {
 	void Flip() override;
 	void Draw2DImage(Uint32 textureId, const SDL_Rect& srcRect, const SDL_Rect& dstRect) override;
 	void Download(SDL_Surface* target) override;
+	void SetDither(bool dither) override;
 
 private:
 	void AddTextureDestroyCallback(Uint32 id, IDirect3DRMTexture* texture);

miniwin/src/internal/d3drmrenderer_opengles2.h

@@ -57,6 +57,7 @@ class OpenGLES2Renderer : public Direct3DRMRenderer {
 	void Flip() override;
 	void Draw2DImage(Uint32 textureId, const SDL_Rect& srcRect, const SDL_Rect& dstRect) override;
 	void Download(SDL_Surface* target) override;
+	void SetDither(bool dither) override;
 
 private:
 	void AddTextureDestroyCallback(Uint32 id, IDirect3DRMTexture* texture);

miniwin/src/internal/d3drmrenderer_sdl3gpu.h

@@ -67,6 +67,7 @@ class Direct3DRMSDL3GPURenderer : public Direct3DRMRenderer {
 	void Flip() override;
 	void Draw2DImage(Uint32 textureId, const SDL_Rect& srcRect, const SDL_Rect& dstRect) override;
 	void Download(SDL_Surface* target) override;
+	void SetDither(bool dither) override;
 
 private:
 	Direct3DRMSDL3GPURenderer(

miniwin/src/internal/d3drmrenderer_software.h

@@ -49,6 +49,7 @@ class Direct3DRMSoftwareRenderer : public Direct3DRMRenderer {
 	void Flip() override;
 	void Draw2DImage(Uint32 textureId, const SDL_Rect& srcRect, const SDL_Rect& dstRect) override;
 	void Download(SDL_Surface* target) override;
+	void SetDither(bool dither) override;
 
 private:
 	void ClearZBuffer();