Shader generator: Move FS_TEX_ALPHA to a uniform bool.

Core/Util/PPGeDraw.cpp

@@ -1327,7 +1327,7 @@ bool PPGeImage::Load() {
 	unsigned char *textureData;
 	int success;
 	if (filename_.empty()) {
-		success = pngLoadPtr(Memory::GetPointerRange(png_, size_), size_, &width_, &height_, &textureData);
+		success = pngLoadPtr(Memory::GetPointerRange(png_, (u32)size_), size_, &width_, &height_, &textureData);
 	} else {
 		std::vector<u8> pngData;
 		if (pspFileSystem.ReadEntireFile(filename_, pngData) < 0) {

GPU/Common/FragmentShaderGenerator.cpp

@@ -105,7 +105,6 @@ bool GenerateFragmentShader(const FShaderID &id, char *buffer, const ShaderLangu
 	bool colorTestAgainstZero = id.Bit(FS_BIT_COLOR_AGAINST_ZERO);
 	bool enableColorDoubling = id.Bit(FS_BIT_COLOR_DOUBLE);
 	bool doTextureProjection = id.Bit(FS_BIT_DO_TEXTURE_PROJ);
-	bool doTextureAlpha = id.Bit(FS_BIT_TEXALPHA);
 
 	if (texture3D && arrayTexture) {
 		*errorString = "Invalid combination of 3D texture and array texture, shouldn't happen";
@@ -257,8 +256,11 @@ bool GenerateFragmentShader(const FShaderID &id, char *buffer, const ShaderLangu
 			if (stencilToAlpha && replaceAlphaWithStencilType == STENCIL_VALUE_UNIFORM) {
 				WRITE(p, "float u_stencilReplaceValue : register(c%i);\n", CONST_PS_STENCILREPLACE);
 			}
-			if (doTexture && texFunc == GE_TEXFUNC_BLEND) {
-				WRITE(p, "float3 u_texenv : register(c%i);\n", CONST_PS_TEXENV);
+			if (doTexture) {
+				if (texFunc == GE_TEXFUNC_BLEND) {
+					WRITE(p, "float3 u_texenv : register(c%i);\n", CONST_PS_TEXENV);
+				}
+				WRITE(p, "float u_texNoAlpha : register(c%i);\n", CONST_PS_TEX_NO_ALPHA);
 			}
 			WRITE(p, "float3 u_fogcolor : register(c%i);\n", CONST_PS_FOGCOLOR);
 			if (texture3D) {
@@ -351,6 +353,8 @@ bool GenerateFragmentShader(const FShaderID &id, char *buffer, const ShaderLangu
 			} else {
 				WRITE(p, "uniform sampler2D tex;\n");
 			}
+			*uniformMask |= DIRTY_TEXALPHA;
+			WRITE(p, "uniform float u_texNoAlpha;\n");
 		}
 
 		if (readFramebufferTex) {
@@ -817,64 +821,38 @@ bool GenerateFragmentShader(const FShaderID &id, char *buffer, const ShaderLangu
 				break;
 			}
 
-			if (texFunc != GE_TEXFUNC_REPLACE || !doTextureAlpha)
-				WRITE(p, "  vec4 p = v_color0;\n");
-
-			if (doTextureAlpha) { // texfmt == RGBA
-				switch (texFunc) {
-				case GE_TEXFUNC_MODULATE:
-					WRITE(p, "  vec4 v = p * t + s\n;");
-					break;
-
-				case GE_TEXFUNC_DECAL:
-					WRITE(p, "  vec4 v = vec4(mix(p.rgb, t.rgb, t.a), p.a) + s;\n"); 
-					break;
-
-				case GE_TEXFUNC_BLEND:
-					WRITE(p, "  vec4 v = vec4(mix(p.rgb, u_texenv.rgb, t.rgb), p.a * t.a) + s;\n"); 
-					break;
-
-				case GE_TEXFUNC_REPLACE:
-					WRITE(p, "  vec4 v = t + s;\n"); 
-					break;
-
-				case GE_TEXFUNC_ADD:
-				case GE_TEXFUNC_UNKNOWN1:
-				case GE_TEXFUNC_UNKNOWN2:
-				case GE_TEXFUNC_UNKNOWN3:
-					WRITE(p, "  vec4 v = vec4(p.rgb + t.rgb, p.a * t.a) + s;\n"); 
-					break;
-				default:
-					WRITE(p, "  vec4 v = p;\n"); break;
-				}
-			} else { // texfmt == RGB
-				switch (texFunc) {
-				case GE_TEXFUNC_MODULATE:
-					WRITE(p, "  vec4 v = vec4(t.rgb * p.rgb, p.a) + s;\n"); 
-					break;
-
-				case GE_TEXFUNC_DECAL:
-					WRITE(p, "  vec4 v = vec4(t.rgb, p.a) + s;\n"); 
-					break;
-
-				case GE_TEXFUNC_BLEND:
-					WRITE(p, "  vec4 v = vec4(mix(p.rgb, u_texenv.rgb, t.rgb), p.a) + s;\n"); 
-					break;
-
-				case GE_TEXFUNC_REPLACE:
-					WRITE(p, "  vec4 v = vec4(t.rgb, p.a) + s;\n"); 
-					break;
-
-				case GE_TEXFUNC_ADD:
-				case GE_TEXFUNC_UNKNOWN1:
-				case GE_TEXFUNC_UNKNOWN2:
-				case GE_TEXFUNC_UNKNOWN3:
-					WRITE(p, "  vec4 v = vec4(p.rgb + t.rgb, p.a) + s;\n"); break;
-				default:
-					WRITE(p, "  vec4 v = p;\n"); break;
-				}
+			WRITE(p, "  vec4 p = v_color0;\n");
+
+			if (texFunc != GE_TEXFUNC_REPLACE) {
+				WRITE(p, "  t.a = max(t.a, u_texNoAlpha);\n");
 			}
 
+			switch (texFunc) {
+			case GE_TEXFUNC_MODULATE:
+				WRITE(p, "  vec4 v = p * t + s;\n");
+				break;
+			case GE_TEXFUNC_DECAL:
+				WRITE(p, "  vec4 v = vec4(mix(p.rgb, t.rgb, t.a), p.a) + s;\n");
+				break;
+			case GE_TEXFUNC_BLEND:
+				WRITE(p, "  vec4 v = vec4(mix(p.rgb, u_texenv.rgb, t.rgb), p.a * t.a) + s;\n");
+				break;
+			case GE_TEXFUNC_REPLACE:
+				WRITE(p, "  vec4 r = t;\n");
+				WRITE(p, "  r.a = mix(r.a, p.a, u_texNoAlpha);\n");
+				WRITE(p, "  vec4 v = r + s;\n");
+				break;
+			case GE_TEXFUNC_ADD:
+			case GE_TEXFUNC_UNKNOWN1:
+			case GE_TEXFUNC_UNKNOWN2:
+			case GE_TEXFUNC_UNKNOWN3:
+				WRITE(p, "  vec4 v = vec4(p.rgb + t.rgb, p.a * t.a) + s;\n");
+				break;
+			default:
+				// Doesn't happen
+				WRITE(p, "  vec4 v = p + s;\n"); break;
+				break;
+			}
 			if (enableColorDoubling) {
 				// This happens before fog is applied.
 				WRITE(p, "  v.rgb = clamp(v.rgb * 2.0, 0.0, 1.0);\n");

GPU/Common/FragmentShaderGenerator.h

@@ -23,7 +23,7 @@
 
 struct FShaderID;
 
-// D3D9 constants
+// D3D9 float constants
 
 #define CONST_PS_TEXENV 0
 #define CONST_PS_ALPHACOLORREF 1
@@ -36,9 +36,13 @@ struct FShaderID;
 #define CONST_PS_TEXCLAMP 8
 #define CONST_PS_TEXCLAMPOFF 9
 #define CONST_PS_MIPBIAS 10
+#define CONST_PS_TEX_NO_ALPHA 11
 
 // For stencil upload
-#define CONST_PS_STENCILVALUE 11
+#define BCONST_PS_STENCILVALUE 12
+
+// D3D9 bool constants, they have their own register space.
+
 
 // Can technically be deduced from the fragment shader ID, but this is safer.
 enum class FragmentShaderFlags : u32 {

GPU/Common/ShaderCommon.h

@@ -90,11 +90,11 @@ enum : uint64_t {
 	DIRTY_MIPBIAS = 1ULL << 37,
 	DIRTY_LIGHT_CONTROL = 1ULL << 38,
 
-	// space for 1 more uniform dirty flags. Remember to update DIRTY_ALL_UNIFORMS.
+	DIRTY_TEXALPHA = 1ULL << 39,
 
 	DIRTY_BONE_UNIFORMS = 0xFF000000ULL,
 
-	DIRTY_ALL_UNIFORMS = 0x7FFFFFFFFFULL,
+	DIRTY_ALL_UNIFORMS = 0xFFFFFFFFFFULL,
 	DIRTY_ALL_LIGHTS = DIRTY_LIGHT0 | DIRTY_LIGHT1 | DIRTY_LIGHT2 | DIRTY_LIGHT3,
 
 	// Other dirty elements that aren't uniforms!

GPU/Common/ShaderId.cpp

@@ -192,7 +192,6 @@ std::string FragmentShaderDesc(const FShaderID &id) {
 	if (id.Bit(FS_BIT_CLEARMODE)) desc << "Clear ";
 	if (id.Bit(FS_BIT_DO_TEXTURE)) desc << (id.Bit(FS_BIT_3D_TEXTURE) ? "Tex3D " : "Tex ");
 	if (id.Bit(FS_BIT_DO_TEXTURE_PROJ)) desc << "TexProj ";
-	if (id.Bit(FS_BIT_TEXALPHA)) desc << "TexAlpha ";
 	if (id.Bit(FS_BIT_TEXTURE_AT_OFFSET)) desc << "TexOffs ";
 	if (id.Bit(FS_BIT_COLOR_DOUBLE)) desc << "2x ";
 	if (id.Bit(FS_BIT_FLATSHADE)) desc << "Flat ";
@@ -291,7 +290,6 @@ void ComputeFragmentShaderID(FShaderID *id_out, const ComputedPipelineState &pip
 		bool enableColorTest = gstate.isColorTestEnabled() && !IsColorTestTriviallyTrue();
 		bool enableColorDoubling = gstate.isColorDoublingEnabled() && gstate.isTextureMapEnabled();
 		bool doTextureProjection = (gstate.getUVGenMode() == GE_TEXMAP_TEXTURE_MATRIX && MatrixNeedsProjection(gstate.tgenMatrix, gstate.getUVProjMode()));
-		bool doTextureAlpha = gstate.isTextureAlphaUsed();
 		bool doFlatShading = gstate.getShadeMode() == GE_SHADE_FLAT;
 
 		ShaderDepalMode shaderDepalMode = gstate_c.shaderDepalMode;
@@ -303,16 +301,9 @@ void ComputeFragmentShaderID(FShaderID *id_out, const ComputedPipelineState &pip
 		SimulateLogicOpType simulateLogicOpType = pipelineState.blendState.simulateLogicOpType;
 		ReplaceAlphaType stencilToAlpha = pipelineState.blendState.replaceAlphaWithStencil;
 
-		// All texfuncs except replace are the same for RGB as for RGBA with full alpha.
-		// Note that checking this means that we must dirty the fragment shader ID whenever textureFullAlpha changes.
-		if (gstate_c.textureFullAlpha && gstate.getTextureFunction() != GE_TEXFUNC_REPLACE) {
-			doTextureAlpha = false;
-		}
-
 		if (gstate.isTextureMapEnabled()) {
 			id.SetBit(FS_BIT_DO_TEXTURE);
 			id.SetBits(FS_BIT_TEXFUNC, 3, gstate.getTextureFunction());
-			id.SetBit(FS_BIT_TEXALPHA, doTextureAlpha & 1); // rgb or rgba
 			if (gstate_c.needShaderTexClamp) {
 				bool textureAtOffset = gstate_c.curTextureXOffset != 0 || gstate_c.curTextureYOffset != 0;
 				// 4 bits total.

GPU/Common/ShaderId.h

@@ -6,9 +6,8 @@
 
 #include "Common/CommonFuncs.h"
 
-// TODO: There will be additional bits, indicating that groups of these will be
-// sent to the shader and processed there. This will cut down the number of shaders ("ubershader approach")
-// This is probably only really worth doing for lighting and bones.
+// VS_BIT_LIGHT_UBERSHADER indicates that some groups of these will be
+// sent to the shader and processed there. This cuts down the number of shaders ("ubershader approach").
 enum VShaderBit : uint8_t {
 	VS_BIT_LMODE = 0,
 	VS_BIT_IS_THROUGH = 1,
@@ -68,7 +67,7 @@ enum FShaderBit : uint8_t {
 	FS_BIT_CLEARMODE = 0,
 	FS_BIT_DO_TEXTURE = 1,
 	FS_BIT_TEXFUNC = 2,  // 3 bits
-	FS_BIT_TEXALPHA = 5,
+	// 1 bit free at position 5
 	FS_BIT_3D_TEXTURE = 6,
 	FS_BIT_SHADER_TEX_CLAMP = 7,
 	FS_BIT_CLAMP_S = 8,

GPU/Common/ShaderUniforms.cpp

@@ -198,8 +198,12 @@ void BaseUpdateUniforms(UB_VS_FS_Base *ub, uint64_t dirtyUniforms, bool flipView
 		}
 	}
 
+	if (dirtyUniforms & DIRTY_TEXALPHA) {
+		ub->texNoAlpha = gstate.isTextureAlphaUsed() ? 0.0f : 1.0f;
+	}
+
 	if (dirtyUniforms & DIRTY_STENCILREPLACEVALUE) {
-		ub->stencil = (float)gstate.getStencilTestRef() * (1.0 / 255.0);
+		ub->stencilReplaceValue = (float)gstate.getStencilTestRef() * (1.0 / 255.0);
 	}
 
 	// Note - this one is not in lighting but in transformCommon as it has uses beyond lighting

GPU/Common/ShaderUniforms.h

@@ -9,15 +9,15 @@
 enum : uint64_t {
 	DIRTY_BASE_UNIFORMS =
 	DIRTY_WORLDMATRIX | DIRTY_PROJTHROUGHMATRIX | DIRTY_VIEWMATRIX | DIRTY_TEXMATRIX | DIRTY_ALPHACOLORREF |
-	DIRTY_PROJMATRIX | DIRTY_FOGCOLOR | DIRTY_FOGCOEFENABLE | DIRTY_TEXENV | DIRTY_STENCILREPLACEVALUE |
+	DIRTY_PROJMATRIX | DIRTY_FOGCOLOR | DIRTY_FOGCOEFENABLE | DIRTY_TEXENV | DIRTY_TEXALPHA | DIRTY_STENCILREPLACEVALUE |
 	DIRTY_ALPHACOLORMASK | DIRTY_SHADERBLEND | DIRTY_COLORWRITEMASK | DIRTY_UVSCALEOFFSET | DIRTY_TEXCLAMP | DIRTY_DEPTHRANGE | DIRTY_MATAMBIENTALPHA |
 	DIRTY_BEZIERSPLINE | DIRTY_DEPAL,
 	DIRTY_LIGHT_UNIFORMS =
 	DIRTY_LIGHT_CONTROL | DIRTY_LIGHT0 | DIRTY_LIGHT1 | DIRTY_LIGHT2 | DIRTY_LIGHT3 |
 	DIRTY_MATDIFFUSE | DIRTY_MATSPECULAR | DIRTY_MATEMISSIVE | DIRTY_AMBIENT,
 };
 
-// Currently 448 bytes.
+// Currently 496 bytes.
 // Every line here is a 4-float.
 struct alignas(16) UB_VS_FS_Base {
 	float proj[16];
@@ -35,10 +35,11 @@ struct alignas(16) UB_VS_FS_Base {
 	// Fragment data
 	float fogColor[3]; uint32_t alphaColorRef;
 	float texEnvColor[3]; uint32_t colorTestMask;
-	float blendFixA[3]; float stencil;
+	float blendFixA[3]; float stencilReplaceValue;
 	float blendFixB[3]; float rotation;
 	float texClamp[4];
 	float texClampOffset[2]; float fogCoef[2];
+	float texNoAlpha; float pad[3];
 	// VR stuff is to go here, later. For normal drawing, we can then get away
 	// with just uploading the first 448 bytes of the struct (up to and including fogCoef).
 };
@@ -65,6 +66,7 @@ R"(  mat4 u_proj;
   vec4 u_texclamp;
   vec2 u_texclampoff;
   vec2 u_fogcoef;
+  float u_texNoAlpha; float pad0; float pad1; float pad2;
 )";
 
 // 512 bytes. Would like to shrink more. Some colors only have 8-bit precision and we expand

GPU/Directx9/ShaderManagerDX9.cpp

@@ -261,7 +261,7 @@ static void ConvertProjMatrixToD3DThrough(Matrix4x4 &in) {
 	in.translateAndScale(Vec3(xoff, yoff, 0.5f), Vec3(1.0f, 1.0f, 0.5f));
 }
 
-const uint64_t psUniforms = DIRTY_TEXENV | DIRTY_ALPHACOLORREF | DIRTY_ALPHACOLORMASK | DIRTY_FOGCOLOR | DIRTY_STENCILREPLACEVALUE | DIRTY_SHADERBLEND | DIRTY_TEXCLAMP | DIRTY_MIPBIAS;
+const uint64_t psUniforms = DIRTY_TEXENV | DIRTY_TEXALPHA | DIRTY_ALPHACOLORREF | DIRTY_ALPHACOLORMASK | DIRTY_FOGCOLOR | DIRTY_STENCILREPLACEVALUE | DIRTY_SHADERBLEND | DIRTY_TEXCLAMP | DIRTY_MIPBIAS;
 
 void ShaderManagerDX9::PSUpdateUniforms(u64 dirtyUniforms) {
 	if (dirtyUniforms & DIRTY_TEXENV) {
@@ -279,7 +279,10 @@ void ShaderManagerDX9::PSUpdateUniforms(u64 dirtyUniforms) {
 	if (dirtyUniforms & DIRTY_STENCILREPLACEVALUE) {
 		PSSetFloat(CONST_PS_STENCILREPLACE, (float)gstate.getStencilTestRef() * (1.0f / 255.0f));
 	}
-
+	if (dirtyUniforms & DIRTY_TEXALPHA) {
+		// NOTE: Reversed value, more efficient in shader.
+		PSSetFloat(CONST_PS_TEX_NO_ALPHA, gstate.isTextureAlphaUsed() ? 0.0f : 1.0f);
+	}
 	if (dirtyUniforms & DIRTY_SHADERBLEND) {
 		PSSetColorUniform3(CONST_PS_BLENDFIXA, gstate.getFixA());
 		PSSetColorUniform3(CONST_PS_BLENDFIXB, gstate.getFixB());

GPU/GLES/ShaderManagerGLES.cpp

@@ -152,6 +152,7 @@ LinkedShader::LinkedShader(GLRenderManager *render, VShaderID VSID, Shader *vs,
 	queries.push_back({ &u_uvscaleoffset, "u_uvscaleoffset" });
 	queries.push_back({ &u_texclamp, "u_texclamp" });
 	queries.push_back({ &u_texclampoff, "u_texclampoff" });
+	queries.push_back({ &u_texNoAlpha, "u_texNoAlpha" });
 	queries.push_back({ &u_lightControl, "u_lightControl" });
 
 	for (int i = 0; i < 4; i++) {
@@ -440,6 +441,9 @@ void LinkedShader::UpdateUniforms(const ShaderID &vsid, bool useBufferedRenderin
 	if (dirty & DIRTY_TEXENV) {
 		SetColorUniform3(render_, &u_texenv, gstate.texenvcolor);
 	}
+	if (dirty & DIRTY_TEXALPHA) {
+		render_->SetUniformF1(&u_texNoAlpha, gstate.isTextureAlphaUsed() ? 0.0f : 1.0f);
+	}
 	if (dirty & DIRTY_ALPHACOLORREF) {
 		if (shaderLanguage.bitwiseOps) {
 			render_->SetUniformUI1(&u_alphacolorref, gstate.getColorTestRef() | ((gstate.getAlphaTestRef() & gstate.getAlphaTestMask()) << 24));
@@ -945,7 +949,7 @@ enum class CacheDetectFlags {
 };
 
 #define CACHE_HEADER_MAGIC 0x83277592
-#define CACHE_VERSION 21
+#define CACHE_VERSION 22
 struct CacheHeader {
 	uint32_t magic;
 	uint32_t version;

GPU/GLES/ShaderManagerGLES.h

@@ -101,6 +101,7 @@ class LinkedShader {
 	int u_uvscaleoffset;
 	int u_texclamp;
 	int u_texclampoff;
+	int u_texNoAlpha;
 
 	// Lighting
 	int u_lightControl;

GPU/GPUCommon.cpp

@@ -94,7 +94,7 @@ const CommonCommandTableEntry commonCommandTable[] = {
 	{ GE_CMD_TEXSHADELS, FLAG_FLUSHBEFOREONCHANGE, DIRTY_VERTEXSHADER_STATE },
 	// Raster state for Direct3D 9, uncommon.
 	{ GE_CMD_SHADEMODE, FLAG_FLUSHBEFOREONCHANGE, DIRTY_VERTEXSHADER_STATE | DIRTY_FRAGMENTSHADER_STATE | DIRTY_RASTER_STATE },
-	{ GE_CMD_TEXFUNC, FLAG_FLUSHBEFOREONCHANGE, DIRTY_FRAGMENTSHADER_STATE },
+	{ GE_CMD_TEXFUNC, FLAG_FLUSHBEFOREONCHANGE, DIRTY_FRAGMENTSHADER_STATE | DIRTY_TEXALPHA },
 	{ GE_CMD_COLORTEST, FLAG_FLUSHBEFOREONCHANGE, DIRTY_FRAGMENTSHADER_STATE },
 	{ GE_CMD_ALPHATESTENABLE, FLAG_FLUSHBEFOREONCHANGE, DIRTY_FRAGMENTSHADER_STATE },
 	{ GE_CMD_COLORTESTENABLE, FLAG_FLUSHBEFOREONCHANGE, DIRTY_FRAGMENTSHADER_STATE },

GPU/Vulkan/ShaderManagerVulkan.cpp

@@ -516,7 +516,7 @@ enum class VulkanCacheDetectFlags {
 };
 
 #define CACHE_HEADER_MAGIC 0xff51f420 
-#define CACHE_VERSION 35
+#define CACHE_VERSION 36
 struct VulkanCacheHeader {
 	uint32_t magic;
 	uint32_t version;