GPU: Properly handle semitransparent pixels
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40d2497087
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c02cbc57e8
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@ -263,4 +263,76 @@ void Program::Uniform4f(u32 index, float x, float y, float z, float w) const
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glUniform4f(location, x, y, z, w);
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}
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void Program::Uniform2uiv(u32 index, const u32* v) const
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{
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Assert(index < m_uniform_locations.size());
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const int location = m_uniform_locations[index];
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if (location >= 0)
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glUniform2uiv(location, 1, v);
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}
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void Program::Uniform3uiv(u32 index, const u32* v) const
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{
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Assert(index < m_uniform_locations.size());
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const int location = m_uniform_locations[index];
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if (location >= 0)
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glUniform3uiv(location, 1, v);
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}
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void Program::Uniform4uiv(u32 index, const u32* v) const
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{
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Assert(index < m_uniform_locations.size());
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const int location = m_uniform_locations[index];
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if (location >= 0)
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glUniform4uiv(location, 1, v);
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}
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void Program::Uniform2iv(u32 index, const s32* v) const
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{
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Assert(index < m_uniform_locations.size());
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const int location = m_uniform_locations[index];
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if (location >= 0)
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glUniform2iv(location, 1, v);
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}
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void Program::Uniform3iv(u32 index, const s32* v) const
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{
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Assert(index < m_uniform_locations.size());
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const int location = m_uniform_locations[index];
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if (location >= 0)
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glUniform3iv(location, 1, v);
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}
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void Program::Uniform4iv(u32 index, const s32* v) const
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{
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Assert(index < m_uniform_locations.size());
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const int location = m_uniform_locations[index];
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if (location >= 0)
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glUniform4iv(location, 1, v);
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}
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void Program::Uniform2fv(u32 index, const float* v) const
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{
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Assert(index < m_uniform_locations.size());
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const int location = m_uniform_locations[index];
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if (location >= 0)
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glUniform2fv(location, 1, v);
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}
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void Program::Uniform3fv(u32 index, const float* v) const
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{
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Assert(index < m_uniform_locations.size());
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const int location = m_uniform_locations[index];
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if (location >= 0)
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glUniform3fv(location, 1, v);
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}
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void Program::Uniform4fv(u32 index, const float* v) const
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{
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Assert(index < m_uniform_locations.size());
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const int location = m_uniform_locations[index];
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if (location >= 0)
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glUniform4fv(location, 1, v);
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}
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} // namespace GL
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@ -40,6 +40,15 @@ public:
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void Uniform2f(u32 index, float x, float y) const;
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void Uniform3f(u32 index, float x, float y, float z) const;
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void Uniform4f(u32 index, float x, float y, float z, float w) const;
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void Uniform2uiv(u32 index, const u32* v) const;
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void Uniform3uiv(u32 index, const u32* v) const;
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void Uniform4uiv(u32 index, const u32* v) const;
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void Uniform2iv(u32 index, const s32* v) const;
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void Uniform3iv(u32 index, const s32* v) const;
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void Uniform4iv(u32 index, const s32* v) const;
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void Uniform2fv(u32 index, const float* v) const;
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void Uniform3fv(u32 index, const float* v) const;
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void Uniform4fv(u32 index, const float* v) const;
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private:
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GLuint m_program_id = 0;
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@ -176,7 +176,7 @@ in ivec2 a_pos;
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in vec4 a_col0;
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in vec2 a_tex0;
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out vec4 v_col0;
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out vec3 v_col0;
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#if TEXTURED
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out vec2 v_tex0;
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#endif
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@ -190,7 +190,7 @@ void main()
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float pos_y = (float(a_pos.y + u_pos_offset.y) / -256.0) + 1.0;
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gl_Position = vec4(pos_x, pos_y, 0.0, 1.0);
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v_col0 = a_col0;
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v_col0 = a_col0.rgb;
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#if TEXTURED
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v_tex0 = a_tex0;
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#endif
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@ -200,7 +200,8 @@ void main()
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return ss.str();
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}
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std::string GPU_HW::GenerateFragmentShader(bool textured, bool blending, TextureColorMode texture_color_mode)
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std::string GPU_HW::GenerateFragmentShader(bool textured, bool blending, bool transparent,
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TextureColorMode texture_color_mode)
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{
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std::stringstream ss;
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GenerateShaderHeader(ss);
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@ -213,7 +214,8 @@ std::string GPU_HW::GenerateFragmentShader(bool textured, bool blending, Texture
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DefineMacro(ss, "PALETTE_8_BIT", textured && texture_color_mode == GPU::TextureColorMode::Palette8Bit);
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ss << R"(
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in vec4 v_col0;
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in vec3 v_col0;
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uniform vec2 u_transparent_alpha;
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#if TEXTURED
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in vec2 v_tex0;
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uniform sampler2D samp0;
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@ -272,13 +274,30 @@ void main()
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if (texcol == vec4(0.0, 0.0, 0.0, 0.0))
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discard;
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vec3 color;
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#if BLENDING
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o_col0 = vec4((ivec4(v_col0 * 255.0) * ivec4(texcol * 255.0)) >> 7) / 255.0;
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color = vec3((ivec3(v_col0 * 255.0) * ivec3(texcol.rgb * 255.0)) >> 7) / 255.0;
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#else
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o_col0 = texcol;
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color = texcol.rgb;
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#endif
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#if TRANSPARENT
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// Apply semitransparency. If not a semitransparent texel, destination alpha is ignored.
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if (texcol.a != 0)
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o_col0 = vec4(color * u_transparent_alpha.x, u_transparent_alpha.y);
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else
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o_col0 = vec4(color, 0.0);
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#else
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// Mask bit from texture.
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o_col0 = vec4(color, texcol.a);
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#endif
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#else
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o_col0 = v_col0;
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#if TRANSPARENT
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o_col0 = vec4(v_col0 * u_transparent_alpha.x, u_transparent_alpha.y);
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#else
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// Mask bit is cleared for untextured polygons.
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o_col0 = vec4(v_col0, 0.0);
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#endif
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#endif
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}
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)";
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@ -18,6 +18,7 @@ protected:
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u32 color;
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u16 texcoord;
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u16 padding;
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u32 texpage;
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static constexpr std::tuple<u8, u8> DecodeTexcoord(u16 texcoord)
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{
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@ -74,7 +75,7 @@ protected:
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void CalcScissorRect(int* left, int* top, int* right, int* bottom);
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std::string GenerateVertexShader(bool textured);
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std::string GenerateFragmentShader(bool textured, bool blending, TextureColorMode texture_color_mode);
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std::string GenerateFragmentShader(bool textured, bool blending, bool transparent, TextureColorMode texture_color_mode);
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std::string GenerateScreenQuadVertexShader();
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std::string GenerateFillFragmentShader();
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@ -143,13 +143,17 @@ bool GPU_HW_OpenGL::CompilePrograms()
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{
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for (u32 blending = 0; blending < 2; blending++)
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{
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for (u32 format = 0; format < 3; format++)
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for (u32 transparent = 0; transparent < 2; transparent++)
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{
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// TODO: eliminate duplicate shaders here
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if (!CompileProgram(m_render_programs[textured][blending][format], ConvertToBoolUnchecked(textured),
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ConvertToBoolUnchecked(blending), static_cast<TextureColorMode>(format)))
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for (u32 format = 0; format < 3; format++)
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{
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return false;
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// TODO: eliminate duplicate shaders here
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if (!CompileProgram(m_render_programs[textured][blending][transparent][format],
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ConvertToBoolUnchecked(textured), ConvertToBoolUnchecked(blending),
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ConvertToBoolUnchecked(transparent), static_cast<TextureColorMode>(format)))
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{
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return false;
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}
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}
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}
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}
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@ -158,10 +162,11 @@ bool GPU_HW_OpenGL::CompilePrograms()
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return true;
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}
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bool GPU_HW_OpenGL::CompileProgram(GL::Program& prog, bool textured, bool blending, TextureColorMode texture_color_mode)
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bool GPU_HW_OpenGL::CompileProgram(GL::Program& prog, bool textured, bool blending, bool transparent,
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TextureColorMode texture_color_mode)
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{
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const std::string vs = GenerateVertexShader(textured);
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const std::string fs = GenerateFragmentShader(textured, blending, texture_color_mode);
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const std::string fs = GenerateFragmentShader(textured, blending, transparent, texture_color_mode);
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if (!prog.Compile(vs.c_str(), fs.c_str()))
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return false;
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@ -177,14 +182,16 @@ bool GPU_HW_OpenGL::CompileProgram(GL::Program& prog, bool textured, bool blendi
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prog.Bind();
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prog.RegisterUniform("u_pos_offset");
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prog.RegisterUniform("u_transparent_alpha");
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prog.Uniform2i(0, 0, 0);
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prog.Uniform2f(1, 1.0f, 0.0f);
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if (textured)
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{
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prog.RegisterUniform("samp0");
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prog.RegisterUniform("u_texture_page_base");
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prog.RegisterUniform("u_texture_palette_base");
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prog.Uniform1i(1, 0);
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prog.Uniform1i(2, 0);
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}
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return true;
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@ -194,16 +201,26 @@ void GPU_HW_OpenGL::SetProgram()
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{
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const GL::Program& prog =
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m_render_programs[BoolToUInt32(m_batch.texture_enable)][BoolToUInt32(m_batch.texture_blending_enable)]
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[static_cast<u32>(m_batch.texture_color_mode)];
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[BoolToUInt32(m_batch.transparency_enable)][static_cast<u32>(m_batch.texture_color_mode)];
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prog.Bind();
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prog.Uniform2i(0, m_drawing_offset.x, m_drawing_offset.y);
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if (m_batch.transparency_enable)
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{
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static constexpr float transparent_alpha[4][2] = {{0.5f, 0.5f}, {1.0f, 1.0f}, {1.0f, 1.0f}, {0.25f, 1.0f}};
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prog.Uniform2fv(1, transparent_alpha[static_cast<u32>(m_batch.transparency_mode)]);
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}
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else
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{
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static constexpr float disabled_alpha[2] = {1.0f, 0.0f};
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prog.Uniform2fv(1, disabled_alpha);
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}
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if (m_batch.texture_enable)
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{
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m_vram_read_texture->Bind();
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prog.Uniform2i(2, m_batch.texture_page_x, m_batch.texture_page_y);
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prog.Uniform2i(3, m_batch.texture_palette_x, m_batch.texture_palette_y);
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prog.Uniform2i(3, m_batch.texture_page_x, m_batch.texture_page_y);
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prog.Uniform2i(4, m_batch.texture_palette_x, m_batch.texture_palette_y);
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}
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}
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@ -228,32 +245,18 @@ void GPU_HW_OpenGL::SetScissor()
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void GPU_HW_OpenGL::SetBlendState()
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{
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struct BlendVars
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{
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GLenum src_factor;
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GLenum func;
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GLenum dst_factor;
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float color;
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};
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static const std::array<BlendVars, 4> blend_vars = {{
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{GL_CONSTANT_COLOR, GL_FUNC_ADD, GL_CONSTANT_COLOR, 0.5f}, // B/2 + F/2
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{GL_ONE, GL_FUNC_ADD, GL_ONE, -1.0f}, // B + F
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{GL_ONE, GL_FUNC_REVERSE_SUBTRACT, GL_ONE, -1.0f}, // B - F
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{GL_CONSTANT_COLOR, GL_FUNC_ADD, GL_ONE, 0.25f} // B + F/4
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}};
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if (!m_batch.transparency_enable)
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{
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glDisable(GL_BLEND);
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return;
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}
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const BlendVars& vars = blend_vars[static_cast<u8>(m_batch.transparency_mode)];
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glEnable(GL_BLEND);
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glBlendFuncSeparate(vars.src_factor, vars.dst_factor, GL_ONE, GL_ZERO);
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glBlendEquationSeparate(vars.func, GL_FUNC_ADD);
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if (vars.color >= 0.0f)
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glBlendColor(vars.color, vars.color, vars.color, 1.0f);
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glBlendEquationSeparate(m_batch.transparency_mode == GPU::TransparencyMode::BackgroundMinusForeground ?
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GL_FUNC_REVERSE_SUBTRACT :
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GL_FUNC_ADD,
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GL_FUNC_ADD);
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glBlendFuncSeparate(GL_ONE, GL_SRC_ALPHA, GL_ONE, GL_ZERO);
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}
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void GPU_HW_OpenGL::UpdateDisplay()
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@ -44,7 +44,7 @@ private:
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void CreateVertexBuffer();
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bool CompilePrograms();
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bool CompileProgram(GL::Program& prog, bool textured, bool blending, TextureColorMode texture_color_mode);
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bool CompileProgram(GL::Program& prog, bool textured, bool blending, bool transparent, TextureColorMode texture_color_mode);
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void SetProgram();
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void SetViewport();
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@ -62,7 +62,7 @@ private:
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GLuint m_vao_id = 0;
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GLuint m_attributeless_vao_id = 0;
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std::array<std::array<std::array<GL::Program, 3>, 2>, 2> m_render_programs;
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std::array<std::array<std::array<std::array<GL::Program, 3>, 2>, 2>, 2> m_render_programs;
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std::array<GL::Program, 3> m_texture_page_programs;
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GLStats m_stats = {};
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