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GPU: Implement "Scaled Dithering" option

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Fixes #29.
This commit is contained in:
Connor McLaughlin
2020-03-01 00:05:31 +10:00
parent d41e6dd28f
commit 635ab72b37
14 changed files with 65 additions and 22 deletions
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14
src/core/gpu_hw_shadergen.cpp
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@ -6,10 +6,11 @@
Log_SetChannel(GPU_HW_ShaderGen);
GPU_HW_ShaderGen::GPU_HW_ShaderGen(HostDisplay::RenderAPI render_api, u32 resolution_scale, bool true_color,
bool texture_filtering, bool supports_dual_source_blend)
bool scaled_dithering, bool texture_filtering, bool supports_dual_source_blend)
: m_render_api(render_api), m_resolution_scale(resolution_scale), m_true_color(true_color),
m_texture_filering(texture_filtering), m_glsl(render_api != HostDisplay::RenderAPI::D3D11),
m_glsl_es(render_api == HostDisplay::RenderAPI::OpenGLES), m_supports_dual_source_blend(supports_dual_source_blend)
m_scaled_dithering(scaled_dithering), m_texture_filering(texture_filtering),
m_glsl(render_api != HostDisplay::RenderAPI::D3D11), m_glsl_es(render_api == HostDisplay::RenderAPI::OpenGLES),
m_supports_dual_source_blend(supports_dual_source_blend)
{
if (m_glsl)
SetGLSLVersionString();
@ -411,6 +412,7 @@ std::string GPU_HW_ShaderGen::GenerateBatchFragmentShader(GPU_HW::BatchRenderMod
DefineMacro(ss, "PALETTE_8_BIT", actual_texture_mode == GPU::TextureMode::Palette8Bit);
DefineMacro(ss, "RAW_TEXTURE", raw_texture);
DefineMacro(ss, "DITHERING", dithering);
DefineMacro(ss, "DITHERING_SCALED", m_scaled_dithering);
DefineMacro(ss, "TRUE_COLOR", m_true_color);
DefineMacro(ss, "TEXTURE_FILTERING", m_texture_filering);
DefineMacro(ss, "USE_DUAL_SOURCE", use_dual_source);
@ -570,7 +572,11 @@ float4 SampleFromVRAM(int4 texpage, int2 icoord)
// Apply dithering
#if DITHERING
icolor = ApplyDithering(int2(v_pos.xy) / int2(RESOLUTION_SCALE, RESOLUTION_SCALE), icolor);
#if DITHERING_SCALED
icolor = ApplyDithering(int2(v_pos.xy), icolor);
#else
icolor = ApplyDithering(int2(v_pos.xy) / int2(RESOLUTION_SCALE, RESOLUTION_SCALE), icolor);
#endif
#endif
// Clip to 15-bit range