// Here we must take all the bits of the gstate that determine what the fragment shader will
// look like, and concatenate them together into an ID.
void ComputeFragmentShaderID(FragmentShaderID *id) {
memset(&id->d[0], 0, sizeof(id->d));
if (gstate.clearmode & 1) {
// We only need one clear shader, so let's ignore the rest of the bits.
id->d[0] = 1;
} else {
int lmode = (gstate.lmode & 1) && gstate.isLightingEnabled();
bool enableFog = gstate.isFogEnabled() && !gstate.isModeThrough();
bool enableAlphaTest = gstate.isAlphaTestEnabled() && !IsAlphaTestTriviallyTrue();
bool enableColorTest = gstate.isColorTestEnabled() && !IsColorTestTriviallyTrue();
bool enableColorDoubling = (gstate.texfunc & 0x10000) != 0;
// This isn't really correct, but it's a hack to get doubled blend modes to work more correctly.
bool enableAlphaDoubling = CanDoubleSrcBlendMode();
bool doTextureProjection = gstate.getUVGenMode() == 1;
// id->d[0] |= (gstate.clearmode & 1);
if (gstate.isTextureMapEnabled()) {
id->d[0] |= 1 << 1;
id->d[0] |= (gstate.texfunc & 0x7) << 2;
id->d[0] |= ((gstate.texfunc & 0x100) >> 8) << 5; // rgb or rgba
id->d[0] |= ((gstate.texfunc & 0x10000) >> 16) << 6; // color double
}
id->d[0] |= (lmode & 1) << 7;
id->d[0] |= gstate.isAlphaTestEnabled() << 8;
if (enableAlphaTest)
id->d[0] |= (gstate.alphatest & 0x7) << 9; // alpha test func
id->d[0] |= gstate.isColorTestEnabled() << 12;
if (enableColorTest)
id->d[0] |= (gstate.colortest & 0x3) << 13; // color test func
id->d[0] |= (enableFog & 1) << 15;
id->d[0] |= (doTextureProjection & 1) << 16;
id->d[0] |= (enableColorDoubling & 1) << 17;
id->d[0] |= (enableAlphaDoubling & 1) << 18;
}
// TODO: Setting to disable?
bool ShouldUseShaderBlending() {
if (!gstate.isAlphaBlendEnabled()) {
return false;
}
// We can't blit on GLES2, so we don't support it. We also want texelFetch (OpenGL 3.0+ / GLES3+.)
if (!gl_extensions.VersionGEThan(3, 0, 0) && !gl_extensions.GLES3) {
return false;
}
GEBlendSrcFactor funcA = gstate.getBlendFuncA();
GEBlendDstFactor funcB = gstate.getBlendFuncB();
GEBlendMode eq = gstate.getBlendEq();
if (eq == GE_BLENDMODE_ABSDIFF) {
return true;
}
// This normally involves a blit, so try to skip it.
if (AlphaToColorDoubling() || CanDoubleSrcBlendMode()) {
return false;
}
switch (funcA) {
case GE_SRCBLEND_DOUBLESRCALPHA:
case GE_SRCBLEND_DOUBLEINVSRCALPHA:
case GE_SRCBLEND_DOUBLEDSTALPHA:
case GE_SRCBLEND_DOUBLEINVDSTALPHA:
return true;
case GE_SRCBLEND_FIXA:
if (funcB == GE_DSTBLEND_FIXB) {
u32 fixA = gstate.getFixA();
u32 fixB = gstate.getFixB();
// OpenGL only supports one constant color, so check if we could be more exact.
if (fixA != fixB && fixA != 0xFFFFFF - fixB && fixA != 0 && fixB != 0 && fixA != 0xFFFFFF && fixB != 0xFFFFFF) {
return true;
}
}
default:
break;
}
switch (funcB) {
case GE_DSTBLEND_DOUBLESRCALPHA:
case GE_DSTBLEND_DOUBLEINVSRCALPHA:
case GE_DSTBLEND_DOUBLEDSTALPHA:
case GE_DSTBLEND_DOUBLEINVDSTALPHA:
return true;
default:
break;
}
return false;
}
// Here we must take all the bits of the gstate that determine what the fragment shader will
// look like, and concatenate them together into an ID.
void ComputeFragmentShaderID(FragmentShaderID *id) {
memset(&id->d[0], 0, sizeof(id->d));
if (gstate.isModeClear()) {
// We only need one clear shader, so let's ignore the rest of the bits.
id->d[0] = 1;
} else {
bool lmode = gstate.isUsingSecondaryColor() && gstate.isLightingEnabled();
bool enableFog = gstate.isFogEnabled() && !gstate.isModeThrough();
bool enableAlphaTest = gstate.isAlphaTestEnabled() && !IsAlphaTestTriviallyTrue() && !g_Config.bDisableAlphaTest;
bool enableColorTest = gstate.isColorTestEnabled() && !IsColorTestTriviallyTrue();
bool enableColorDoubling = gstate.isColorDoublingEnabled();
// This isn't really correct, but it's a hack to get doubled blend modes to work more correctly.
bool enableAlphaDoubling = CanDoubleSrcBlendMode();
bool doTextureProjection = gstate.getUVGenMode() == GE_TEXMAP_TEXTURE_MATRIX;
bool doTextureAlpha = gstate.isTextureAlphaUsed();
ReplaceAlphaType stencilToAlpha = ReplaceAlphaWithStencil();
// All texfuncs except replace are the same for RGB as for RGBA with full alpha.
if (gstate_c.textureFullAlpha && gstate.getTextureFunction() != GE_TEXFUNC_REPLACE)
doTextureAlpha = false;
// id->d[0] |= (gstate.isModeClear() & 1);
if (gstate.isTextureMapEnabled()) {
id->d[0] |= 1 << 1;
id->d[0] |= gstate.getTextureFunction() << 2;
id->d[0] |= (doTextureAlpha & 1) << 5; // rgb or rgba
}
id->d[0] |= (lmode & 1) << 7;
id->d[0] |= enableAlphaTest << 8;
if (enableAlphaTest)
id->d[0] |= gstate.getAlphaTestFunction() << 9;
id->d[0] |= enableColorTest << 12;
if (enableColorTest)
id->d[0] |= gstate.getColorTestFunction() << 13; // color test func
id->d[0] |= (enableFog & 1) << 15;
id->d[0] |= (doTextureProjection & 1) << 16;
id->d[0] |= (enableColorDoubling & 1) << 17;
id->d[0] |= (enableAlphaDoubling & 1) << 18;
id->d[0] |= (stencilToAlpha) << 19;
if (stencilToAlpha != REPLACE_ALPHA_NO) {
// 3 bits
id->d[0] |= ReplaceAlphaWithStencilType() << 21;
}
if (enableAlphaTest)
gpuStats.numAlphaTestedDraws++;
else
gpuStats.numNonAlphaTestedDraws++;
}
}
// Missing: Z depth range
// Also, logic ops etc, of course. Urgh.
void GenerateFragmentShader(char *buffer) {
char *p = buffer;
#if defined(GLSL_ES_1_0)
WRITE(p, "precision lowp float;\n");
#elif !defined(FORCE_OPENGL_2_0)
WRITE(p, "#version 110\n");
#endif
int lmode = (gstate.lmode & 1) && gstate.isLightingEnabled();
int doTexture = gstate.isTextureMapEnabled() && !gstate.isModeClear();
bool enableFog = gstate.isFogEnabled() && !gstate.isModeThrough() && !gstate.isModeClear();
bool enableAlphaTest = gstate.isAlphaTestEnabled() && !IsAlphaTestTriviallyTrue() && !gstate.isModeClear();
bool enableColorTest = gstate.isColorTestEnabled() && !IsColorTestTriviallyTrue() && !gstate.isModeClear();
bool enableColorDoubling = (gstate.texfunc & 0x10000) != 0;
// This isn't really correct, but it's a hack to get doubled blend modes to work more correctly.
bool enableAlphaDoubling = CanDoubleSrcBlendMode();
bool doTextureProjection = gstate.getUVGenMode() == 1;
bool doTextureAlpha = (gstate.texfunc & 0x100) != 0;
if (gstate_c.textureFullAlpha && (gstate.texfunc & 0x7) != GE_TEXFUNC_REPLACE)
doTextureAlpha = false;
if (doTexture)
WRITE(p, "uniform sampler2D tex;\n");
if (enableAlphaTest || enableColorTest) {
WRITE(p, "uniform vec4 u_alphacolorref;\n");
WRITE(p, "uniform vec4 u_colormask;\n");
}
if (gstate.isTextureMapEnabled())
WRITE(p, "uniform vec3 u_texenv;\n");
WRITE(p, "varying vec4 v_color0;\n");
if (lmode)
WRITE(p, "varying vec3 v_color1;\n");
if (enableFog) {
WRITE(p, "uniform vec3 u_fogcolor;\n");
#if defined(GLSL_ES_1_0)
WRITE(p, "varying mediump float v_fogdepth;\n");
#else
WRITE(p, "varying float v_fogdepth;\n");
#endif
}
if (doTexture)
{
if (doTextureProjection)
WRITE(p, "varying vec3 v_texcoord;\n");
else
WRITE(p, "varying vec2 v_texcoord;\n");
}
WRITE(p, "float roundAndScaleTo255f(in float x) { return floor(x * 255.0 + 0.5); }\n");
WRITE(p, "vec3 roundAndScaleTo255v(in vec3 x) { return floor(x * 255.0 + 0.5); }\n");
WRITE(p, "void main() {\n");
if (gstate.isModeClear()) {
// Clear mode does not allow any fancy shading.
WRITE(p, " gl_FragColor = v_color0;\n");
} else {
const char *secondary = "";
// Secondary color for specular on top of texture
if (lmode) {
WRITE(p, " vec4 s = vec4(v_color1, 0.0);\n");
secondary = " + s";
} else {
secondary = "";
}
if (gstate.textureMapEnable & 1) {
if (doTextureProjection) {
WRITE(p, " vec4 t = texture2DProj(tex, v_texcoord);\n");
} else {
WRITE(p, " vec4 t = texture2D(tex, v_texcoord);\n");
}
WRITE(p, " vec4 p = v_color0;\n");
if (doTextureAlpha) { // texfmt == RGBA
switch (gstate.texfunc & 0x7) {
case GE_TEXFUNC_MODULATE:
WRITE(p, " vec4 v = p * t%s;\n", secondary); break;
case GE_TEXFUNC_DECAL:
WRITE(p, " vec4 v = vec4(mix(p.rgb, t.rgb, t.a), p.a)%s;\n", secondary); break;
case GE_TEXFUNC_BLEND:
WRITE(p, " vec4 v = vec4(mix(p.rgb, u_texenv.rgb, t.rgb), p.a * t.a)%s;\n", secondary); break;
case GE_TEXFUNC_REPLACE:
WRITE(p, " vec4 v = t%s;\n", secondary); break;
case GE_TEXFUNC_ADD:
WRITE(p, " vec4 v = vec4(p.rgb + t.rgb, p.a * t.a)%s;\n", secondary); break;
default:
WRITE(p, " vec4 v = p;\n"); break;
}
} else { // texfmt == RGB
switch (gstate.texfunc & 0x7) {
case GE_TEXFUNC_MODULATE:
WRITE(p, " vec4 v = vec4(t.rgb * p.rgb, p.a)%s;\n", secondary); break;
case GE_TEXFUNC_DECAL:
WRITE(p, " vec4 v = vec4(t.rgb, p.a)%s;\n", secondary); break;
case GE_TEXFUNC_BLEND:
WRITE(p, " vec4 v = vec4(mix(p.rgb, u_texenv.rgb, t.rgb), p.a)%s;\n", secondary); break;
case GE_TEXFUNC_REPLACE:
WRITE(p, " vec4 v = vec4(t.rgb, p.a)%s;\n", secondary); break;
case GE_TEXFUNC_ADD:
WRITE(p, " vec4 v = vec4(p.rgb + t.rgb, p.a)%s;\n", secondary); break;
default:
WRITE(p, " vec4 v = p;\n"); break;
}
}
} else {
// No texture mapping
WRITE(p, " vec4 v = v_color0 %s;\n", secondary);
}
if (enableAlphaTest) {
int alphaTestFunc = gstate.alphatest & 7;
const char *alphaTestFuncs[] = { "#", "#", " != ", " == ", " >= ", " > ", " <= ", " < " }; // never/always don't make sense
if (alphaTestFuncs[alphaTestFunc][0] != '#') {
WRITE(p, " if (roundAndScaleTo255f(v.a) %s u_alphacolorref.a) discard;\n", alphaTestFuncs[alphaTestFunc]);
}
}
// TODO: Before or after the color test?
if (enableColorDoubling && enableAlphaDoubling) {
WRITE(p, " v = v * 2.0;\n");
} else if (enableColorDoubling) {
WRITE(p, " v.rgb = v.rgb * 2.0;\n");
} else if (enableAlphaDoubling) {
WRITE(p, " v.a = v.a * 2.0;\n");
}
if (enableColorTest) {
int colorTestFunc = gstate.colortest & 3;
const char *colorTestFuncs[] = { "#", "#", " != ", " == " }; // never/always don't make sense
int colorTestMask = gstate.colormask;
if (colorTestFuncs[colorTestFunc][0] != '#') {
WRITE(p, "if (roundAndScaleTo255v(v.rgb) %s u_alphacolorref.rgb) discard;\n", colorTestFuncs[colorTestFunc]);
}
}
if (enableFog) {
WRITE(p, " float fogCoef = clamp(v_fogdepth, 0.0, 1.0);\n");
WRITE(p, " gl_FragColor = mix(vec4(u_fogcolor, v.a), v, fogCoef);\n");
// WRITE(p, " v.x = v_depth;\n");
} else {
WRITE(p, " gl_FragColor = v;\n");
}
}
#ifdef DEBUG_SHADER
if (doTexture) {
WRITE(p, " gl_FragColor = texture2D(tex, v_texcoord.xy);\n");
} else {
WRITE(p, " gl_FragColor = vec4(1,0,1,1);\n");
}
#endif
WRITE(p, "}\n");
}
// Missing: Z depth range
void GenerateFragmentShader(char *buffer) {
char *p = buffer;
bool highpFog = false;
#if defined(GLSL_ES_1_0)
WRITE(p, "#version 100\n"); // GLSL ES 1.0
WRITE(p, "precision lowp float;\n");
// PowerVR needs highp to do the fog in MHU correctly.
// Others don't, and some can't handle highp in the fragment shader.
highpFog = gl_extensions.gpuVendor == GPU_VENDOR_POWERVR;
#elif !defined(FORCE_OPENGL_2_0)
WRITE(p, "#version 110\n");
// Remove lowp/mediump in non-mobile implementations
WRITE(p, "#define lowp\n");
WRITE(p, "#define mediump\n");
WRITE(p, "#define highp\n");
#else
// Remove lowp/mediump in non-mobile implementations
WRITE(p, "#define lowp\n");
WRITE(p, "#define mediump\n");
WRITE(p, "#define highp\n");
#endif
bool lmode = gstate.isUsingSecondaryColor() && gstate.isLightingEnabled();
bool doTexture = gstate.isTextureMapEnabled() && !gstate.isModeClear();
bool enableFog = gstate.isFogEnabled() && !gstate.isModeThrough() && !gstate.isModeClear();
bool enableAlphaTest = gstate.isAlphaTestEnabled() && !IsAlphaTestTriviallyTrue() && !gstate.isModeClear() && !g_Config.bDisableAlphaTest;
bool enableColorTest = gstate.isColorTestEnabled() && !IsColorTestTriviallyTrue() && !gstate.isModeClear();
bool enableColorDoubling = gstate.isColorDoublingEnabled();
// This isn't really correct, but it's a hack to get doubled blend modes to work more correctly.
bool enableAlphaDoubling = CanDoubleSrcBlendMode();
bool doTextureProjection = gstate.getUVGenMode() == GE_TEXMAP_TEXTURE_MATRIX;
bool doTextureAlpha = gstate.isTextureAlphaUsed();
bool stencilToAlpha = !gstate.isModeClear() && gstate.isStencilTestEnabled() && !gstate.isAlphaBlendEnabled();
if (gstate_c.textureFullAlpha && gstate.getTextureFunction() != GE_TEXFUNC_REPLACE)
doTextureAlpha = false;
if (doTexture)
WRITE(p, "uniform sampler2D tex;\n");
if (enableAlphaTest || enableColorTest) {
WRITE(p, "uniform vec4 u_alphacolorref;\n");
}
if (stencilToAlpha && ReplaceAlphaWithStencilType() == STENCIL_VALUE_UNIFORM) {
WRITE(p, "uniform float u_stencilReplaceValue;\n");
}
if (gstate.isTextureMapEnabled() && gstate.getTextureFunction() == GE_TEXFUNC_BLEND)
WRITE(p, "uniform lowp vec3 u_texenv;\n");
WRITE(p, "varying lowp vec4 v_color0;\n");
if (lmode)
WRITE(p, "varying lowp vec3 v_color1;\n");
if (enableFog) {
WRITE(p, "uniform lowp vec3 u_fogcolor;\n");
WRITE(p, "varying %s float v_fogdepth;\n", highpFog ? "highp" : "mediump");
}
if (doTexture)
{
if (doTextureProjection)
WRITE(p, "varying mediump vec3 v_texcoord;\n");
else
WRITE(p, "varying mediump vec2 v_texcoord;\n");
}
if (enableAlphaTest) {
if (gl_extensions.gpuVendor == GPU_VENDOR_POWERVR)
WRITE(p, "float roundTo255thf(in mediump float x) { mediump float y = x + (0.5/255.0); return y - fract(y * 255.0) * (1.0 / 255.0); }\n");
else
WRITE(p, "float roundAndScaleTo255f(in float x) { return floor(x * 255.0 + 0.5); }\n");
}
if (enableColorTest) {
if (gl_extensions.gpuVendor == GPU_VENDOR_POWERVR)
WRITE(p, "vec3 roundTo255thv(in vec3 x) { vec3 y = x + (0.5/255.0); return y - fract(y * 255.0) * (1.0 / 255.0); }\n");
else
WRITE(p, "vec3 roundAndScaleTo255v(in vec3 x) { return floor(x * 255.0 + 0.5); }\n");
}
WRITE(p, "void main() {\n");
if (gstate.isModeClear()) {
// Clear mode does not allow any fancy shading.
WRITE(p, " gl_FragColor = v_color0;\n");
} else {
const char *secondary = "";
// Secondary color for specular on top of texture
if (lmode) {
WRITE(p, " vec4 s = vec4(v_color1, 0.0);\n");
secondary = " + s";
} else {
secondary = "";
}
if (gstate.isTextureMapEnabled()) {
if (doTextureProjection) {
WRITE(p, " vec4 t = texture2DProj(tex, v_texcoord);\n");
} else {
WRITE(p, " vec4 t = texture2D(tex, v_texcoord);\n");
}
WRITE(p, " vec4 p = v_color0;\n");
if (doTextureAlpha) { // texfmt == RGBA
switch (gstate.getTextureFunction()) {
case GE_TEXFUNC_MODULATE:
WRITE(p, " vec4 v = p * t%s;\n", secondary); break;
case GE_TEXFUNC_DECAL:
WRITE(p, " vec4 v = vec4(mix(p.rgb, t.rgb, t.a), p.a)%s;\n", secondary); break;
case GE_TEXFUNC_BLEND:
WRITE(p, " vec4 v = vec4(mix(p.rgb, u_texenv.rgb, t.rgb), p.a * t.a)%s;\n", secondary); break;
case GE_TEXFUNC_REPLACE:
WRITE(p, " vec4 v = t%s;\n", secondary); break;
case GE_TEXFUNC_ADD:
WRITE(p, " vec4 v = vec4(p.rgb + t.rgb, p.a * t.a)%s;\n", secondary); break;
default:
WRITE(p, " vec4 v = p;\n"); break;
}
} else { // texfmt == RGB
switch (gstate.getTextureFunction()) {
case GE_TEXFUNC_MODULATE:
WRITE(p, " vec4 v = vec4(t.rgb * p.rgb, p.a)%s;\n", secondary); break;
case GE_TEXFUNC_DECAL:
WRITE(p, " vec4 v = vec4(t.rgb, p.a)%s;\n", secondary); break;
case GE_TEXFUNC_BLEND:
WRITE(p, " vec4 v = vec4(mix(p.rgb, u_texenv.rgb, t.rgb), p.a)%s;\n", secondary); break;
case GE_TEXFUNC_REPLACE:
WRITE(p, " vec4 v = vec4(t.rgb, p.a)%s;\n", secondary); break;
case GE_TEXFUNC_ADD:
WRITE(p, " vec4 v = vec4(p.rgb + t.rgb, p.a)%s;\n", secondary); break;
default:
WRITE(p, " vec4 v = p;\n"); break;
}
}
} else {
// No texture mapping
WRITE(p, " vec4 v = v_color0 %s;\n", secondary);
}
if (enableAlphaTest) {
GEComparison alphaTestFunc = gstate.getAlphaTestFunction();
const char *alphaTestFuncs[] = { "#", "#", " != ", " == ", " >= ", " > ", " <= ", " < " }; // never/always don't make sense
if (alphaTestFuncs[alphaTestFunc][0] != '#') {
if (gl_extensions.gpuVendor == GPU_VENDOR_POWERVR) {
// Work around bad PVR driver problem where equality check + discard just doesn't work.
if (alphaTestFunc != 3)
WRITE(p, " if (roundTo255thf(v.a) %s u_alphacolorref.a) discard;\n", alphaTestFuncs[alphaTestFunc]);
} else {
WRITE(p, " if (roundAndScaleTo255f(v.a) %s u_alphacolorref.a) discard;\n", alphaTestFuncs[alphaTestFunc]);
}
}
}
// TODO: Before or after the color test?
if (enableColorDoubling && enableAlphaDoubling) {
WRITE(p, " v = v * 2.0;\n");
} else if (enableColorDoubling) {
WRITE(p, " v.rgb = v.rgb * 2.0;\n");
} else if (enableAlphaDoubling) {
WRITE(p, " v.a = v.a * 2.0;\n");
}
if (enableColorTest) {
GEComparison colorTestFunc = gstate.getColorTestFunction();
const char *colorTestFuncs[] = { "#", "#", " != ", " == " }; // never/always don't make sense
WARN_LOG_REPORT_ONCE(colortest, G3D, "Color test function : %s", colorTestFuncs[colorTestFunc]);
u32 colorTestMask = gstate.getColorTestMask();
if (colorTestFuncs[colorTestFunc][0] != '#') {
if (gl_extensions.gpuVendor == GPU_VENDOR_POWERVR)
WRITE(p, " if (roundTo255thv(v.rgb) %s u_alphacolorref.rgb) discard;\n", colorTestFuncs[colorTestFunc]);
else
WRITE(p, " if (roundAndScaleTo255v(v.rgb) %s u_alphacolorref.rgb) discard;\n", colorTestFuncs[colorTestFunc]);
}
}
if (enableFog) {
WRITE(p, " float fogCoef = clamp(v_fogdepth, 0.0, 1.0);\n");
WRITE(p, " gl_FragColor = mix(vec4(u_fogcolor, v.a), v, fogCoef);\n");
// WRITE(p, " v.x = v_depth;\n");
} else {
WRITE(p, " gl_FragColor = v;\n");
}
}
if (stencilToAlpha) {
switch (ReplaceAlphaWithStencilType()) {
case STENCIL_VALUE_UNIFORM:
WRITE(p, " gl_FragColor.a = u_stencilReplaceValue;\n");
break;
case STENCIL_VALUE_ZERO:
WRITE(p, " gl_FragColor.a = 0.0;\n");
break;
case STENCIL_VALUE_ONE:
WRITE(p, " gl_FragColor.a = 1.0;\n");
break;
case STENCIL_VALUE_UNKNOWN:
// Maybe we should even mask away alpha using glColorMask and not change it at all? We do get here
// if the stencil mode is KEEP for example.
WRITE(p, " gl_FragColor.a = 0.0;\n");
break;
case STENCIL_VALUE_KEEP:
// Do nothing. We'll mask out the alpha using color mask.
break;
}
}
#ifdef DEBUG_SHADER
if (doTexture) {
WRITE(p, " gl_FragColor = texture2D(tex, v_texcoord.xy);\n");
WRITE(p, " gl_FragColor += vec4(0.3,0,0.3,0.3);\n");
} else {
WRITE(p, " gl_FragColor = vec4(1,0,1,1);\n");
}
#endif
WRITE(p, "}\n");
}
// Missing: Z depth range
// Also, logic ops etc, of course. Urgh.
void GenerateFragmentShaderDX9(char *buffer) {
char *p = buffer;
bool lmode = gstate.isUsingSecondaryColor() && gstate.isLightingEnabled();
bool doTexture = gstate.isTextureMapEnabled() && !gstate.isModeClear();
bool enableFog = gstate.isFogEnabled() && !gstate.isModeThrough() && !gstate.isModeClear();
bool enableAlphaTest = gstate.isAlphaTestEnabled() && !IsAlphaTestTriviallyTrue() && !gstate.isModeClear();
bool enableColorTest = gstate.isColorTestEnabled() && !IsColorTestTriviallyTrue() && !gstate.isModeClear();
bool enableColorDoubling = gstate.isColorDoublingEnabled();
// This isn't really correct, but it's a hack to get doubled blend modes to work more correctly.
bool enableAlphaDoubling = CanDoubleSrcBlendMode();
bool doTextureProjection = gstate.getUVGenMode() == GE_TEXMAP_TEXTURE_MATRIX;
bool doTextureAlpha = gstate.isTextureAlphaUsed();
if (gstate_c.textureFullAlpha && gstate.getTextureFunction() != GE_TEXFUNC_REPLACE)
doTextureAlpha = false;
if (doTexture)
WRITE(p, "sampler tex: register(s0);\n");
if (enableAlphaTest || enableColorTest) {
WRITE(p, "float4 u_alphacolorref : register(c%i);\n", CONST_PS_ALPHACOLORREF);
WRITE(p, "float4 u_alphacolormask : register(c%i);\n", CONST_PS_ALPHACOLORMASK);
}
if (gstate.isTextureMapEnabled() && gstate.getTextureFunction() == GE_TEXFUNC_BLEND) {
WRITE(p, "float3 u_texenv : register(c%i);\n", CONST_PS_TEXENV);
}
if (enableFog) {
WRITE(p, "float3 u_fogcolor : register(c%i);\n", CONST_PS_FOGCOLOR);
}
if (enableAlphaTest) {
WRITE(p, "float roundAndScaleTo255f(float x) { return floor(x * 255.0f + 0.5f); }\n");
}
if (enableColorTest) {
WRITE(p, "float3 roundAndScaleTo255v(float3 x) { return floor(x * 255.0f + 0.5f); }\n");
}
WRITE(p, "struct PS_IN {\n");
if (doTexture) {
if (doTextureProjection)
WRITE(p, " float3 v_texcoord: TEXCOORD0;\n");
else
WRITE(p, " float2 v_texcoord: TEXCOORD0;\n");
}
WRITE(p, " float4 v_color0: COLOR0;\n");
if (lmode) {
WRITE(p, " float3 v_color1: COLOR1;\n");
}
if (enableFog) {
WRITE(p, " float2 v_fogdepth: TEXCOORD1;\n");
}
WRITE(p, "};\n");
WRITE(p, "float4 main( PS_IN In ) : COLOR\n");
WRITE(p, "{\n");
if (gstate.isModeClear()) {
// Clear mode does not allow any fancy shading.
WRITE(p, " return In.v_color0;\n");
} else {
const char *secondary = "";
// Secondary color for specular on top of texture
if (lmode) {
WRITE(p, " float4 s = float4(In.v_color1, 0);\n");
secondary = " + s";
} else {
secondary = "";
}
if (gstate.isTextureMapEnabled()) {
if (doTextureProjection) {
WRITE(p, " float4 t = tex2Dproj(tex, float4(In.v_texcoord.x, In.v_texcoord.y, 0, In.v_texcoord.z))%s;\n", gstate_c.bgraTexture ? ".bgra" : "");
} else {
WRITE(p, " float4 t = tex2D(tex, In.v_texcoord.xy)%s;\n", gstate_c.bgraTexture ? ".bgra" : "");
}
WRITE(p, " float4 p = In.v_color0;\n");
if (doTextureAlpha) { // texfmt == RGBA
switch (gstate.getTextureFunction()) {
case GE_TEXFUNC_MODULATE:
WRITE(p, " float4 v = p * t%s;\n", secondary); break;
case GE_TEXFUNC_DECAL:
WRITE(p, " float4 v = float4(lerp(p.rgb, t.rgb, t.a), p.a)%s;\n", secondary); break;
case GE_TEXFUNC_BLEND:
WRITE(p, " float4 v = float4(lerp(p.rgb, u_texenv.rgb, t.rgb), p.a * t.a)%s;\n", secondary); break;
case GE_TEXFUNC_REPLACE:
WRITE(p, " float4 v = t%s;\n", secondary); break;
case GE_TEXFUNC_ADD:
WRITE(p, " float4 v = float4(p.rgb + t.rgb, p.a * t.a)%s;\n", secondary); break;
default:
WRITE(p, " float4 v = p;\n"); break;
}
} else { // texfmt == RGB
switch (gstate.getTextureFunction()) {
case GE_TEXFUNC_MODULATE:
WRITE(p, " float4 v = float4(t.rgb * p.rgb, p.a)%s;\n", secondary); break;
case GE_TEXFUNC_DECAL:
WRITE(p, " float4 v = float4(t.rgb, p.a)%s;\n", secondary); break;
case GE_TEXFUNC_BLEND:
WRITE(p, " float4 v = float4(lerp(p.rgb, u_texenv.rgb, t.rgb), p.a)%s;\n", secondary); break;
case GE_TEXFUNC_REPLACE:
WRITE(p, " float4 v = float4(t.rgb, p.a)%s;\n", secondary); break;
case GE_TEXFUNC_ADD:
WRITE(p, " float4 v = float4(p.rgb + t.rgb, p.a)%s;\n", secondary); break;
default:
WRITE(p, " float4 v = p;\n"); break;
}
}
} else {
// No texture mapping
WRITE(p, " float4 v = In.v_color0 %s;\n", secondary);
}
#if !defined(DX9_USE_HW_ALPHA_TEST)
if (enableAlphaTest) {
GEComparison alphaTestFunc = gstate.getAlphaTestFunction();
const char *alphaTestFuncs[] = { "#", "#", " != ", " == ", " >= ", " > ", " <= ", " < " }; // never/always don't make sense
if (alphaTestFuncs[alphaTestFunc][0] != '#') {
// TODO: Rewrite this to use clip() appropriately (like, clip(v.a - u_alphacolorref.a))
WRITE(p, " if (roundAndScaleTo255f(v.a) %s u_alphacolorref.a) clip(-1);\n", alphaTestFuncs[alphaTestFunc]);
}
}
#endif
// TODO: Before or after the color test?
if (enableColorDoubling && enableAlphaDoubling) {
WRITE(p, " v = v * 2.0;\n");
} else if (enableColorDoubling) {
WRITE(p, " v.rgb = v.rgb * 2.0;\n");
} else if (enableAlphaDoubling) {
WRITE(p, " v.a = v.a * 2.0;\n");
}
if (enableColorTest) {
GEComparison colorTestFunc = gstate.getColorTestFunction();
const char *colorTestFuncs[] = { "#", "#", " != ", " == " }; // never/always don't make sense
u32 colorTestMask = gstate.getColorTestMask();
if (colorTestFuncs[colorTestFunc][0] != '#') {
const char * test = colorTestFuncs[colorTestFunc];
WRITE(p, "float3 colortest = roundAndScaleTo255v(v.rgb);\n");
WRITE(p, "if ((colortest.r %s u_alphacolorref.r) && (colortest.g %s u_alphacolorref.g) && (colortest.b %s u_alphacolorref.b )) clip(-1);\n", test, test, test);
}
}
if (enableFog) {
WRITE(p, " float fogCoef = clamp(In.v_fogdepth.x, 0.0, 1.0);\n");
WRITE(p, " return lerp(float4(u_fogcolor, v.a), v, fogCoef);\n");
} else {
WRITE(p, " return v;\n");
}
}
WRITE(p, "}\n");
}
// Missing: Z depth range
// Also, logic ops etc, of course. Urgh.
void GenerateFragmentShaderDX9(char *buffer) {
char *p = buffer;
int lmode = lmode = gstate.isUsingSecondaryColor() && gstate.isLightingEnabled();
int doTexture = gstate.isTextureMapEnabled() && !gstate.isModeClear();
bool enableFog = gstate.isFogEnabled() && !gstate.isModeThrough() && !gstate.isModeClear();
bool enableAlphaTest = gstate.isAlphaTestEnabled() && !IsAlphaTestTriviallyTrue() && !gstate.isModeClear();
bool enableColorTest = gstate.isColorTestEnabled() && !IsColorTestTriviallyTrue() && !gstate.isModeClear();
bool enableColorDoubling = gstate.isColorDoublingEnabled();
// This isn't really correct, but it's a hack to get doubled blend modes to work more correctly.
bool enableAlphaDoubling = CanDoubleSrcBlendMode();
bool doTextureProjection = gstate.getUVGenMode() == GE_TEXMAP_TEXTURE_MATRIX;
bool doTextureAlpha = gstate.isTextureAlphaUsed();
if (gstate_c.textureFullAlpha && gstate.getTextureFunction() != GE_TEXFUNC_REPLACE)
doTextureAlpha = false;
if (doTexture)
WRITE(p, "sampler tex: register(s0);\n");
if (enableAlphaTest || enableColorTest) {
WRITE(p, "float4 u_alphacolorref;\n");
WRITE(p, "float4 u_alphacolormask;\n");
}
if (gstate.isTextureMapEnabled())
WRITE(p, "float3 u_texenv;\n");
if (enableFog) {
WRITE(p, "float3 u_fogcolor;\n");
}
if (enableAlphaTest) {
WRITE(p, "float roundAndScaleTo255f(float x) { return floor(x * 255.0f + 0.5f); }\n");
WRITE(p, "float roundTo255th(float x) { float y = x + (0.5/255.0); return y - frac(y * 255.0) * (1.0 / 255.0); }\n");
}
if (enableColorTest) {
WRITE(p, "float3 roundAndScaleTo255v(float3 x) { return floor(x * 255.0f + 0.5f); }\n");
WRITE(p, "float3 roundTo255thv(float3 x) { float3 y = x + (0.5/255.0); return y - frac(y * 255.0) * (1.0 / 255.0); }\n");
}
WRITE(p, " struct PS_IN \n");
WRITE(p, " { \n");
if (doTexture)
{
//if (doTextureProjection)
// WRITE(p, "float3 v_texcoord: TEXCOORD0;\n");
//else
// WRITE(p, "float2 v_texcoord: TEXCOORD0;\n");
}
WRITE(p, " float4 v_texcoord: TEXCOORD0; \n");
WRITE(p, " float4 v_color0: COLOR0; \n");
WRITE(p, " float3 v_color1: COLOR1; \n");
if (enableFog) {
WRITE(p, "float v_fogdepth:FOG;\n");
}
WRITE(p, " }; \n");
WRITE(p, " \n");
WRITE(p, " float4 main( PS_IN In ) : COLOR \n");
WRITE(p, " { \n");
if (gstate.isModeClear()) {
// Clear mode does not allow any fancy shading.
WRITE(p, " return In.v_color0;\n");
} else {
const char *secondary = "";
// Secondary color for specular on top of texture
if (lmode) {
WRITE(p, " float4 s = float4(In.v_color1, 0);\n");
secondary = " + s";
} else {
secondary = "";
}
if (gstate.isTextureMapEnabled()) {
if (doTextureProjection) {
WRITE(p, " float4 t = tex2Dproj(tex, In.v_texcoord);\n");
} else {
WRITE(p, " float4 t = tex2D(tex, In.v_texcoord.xy);\n");
}
WRITE(p, " float4 p = In.v_color0;\n");
if (doTextureAlpha) { // texfmt == RGBA
switch (gstate.getTextureFunction()) {
case GE_TEXFUNC_MODULATE:
WRITE(p, " float4 v = p * t%s;\n", secondary); break;
case GE_TEXFUNC_DECAL:
WRITE(p, " float4 v = float4(lerp(p.rgb, t.rgb, t.a), p.a)%s;\n", secondary); break;
case GE_TEXFUNC_BLEND:
WRITE(p, " float4 v = float4(lerp(p.rgb, u_texenv.rgb, t.rgb), p.a * t.a)%s;\n", secondary); break;
case GE_TEXFUNC_REPLACE:
WRITE(p, " float4 v = t%s;\n", secondary); break;
case GE_TEXFUNC_ADD:
WRITE(p, " float4 v = float4(p.rgb + t.rgb, p.a * t.a)%s;\n", secondary); break;
default:
WRITE(p, " float4 v = p;\n"); break;
}
} else { // texfmt == RGB
switch (gstate.getTextureFunction()) {
case GE_TEXFUNC_MODULATE:
WRITE(p, " float4 v = float4(t.rgb * p.rgb, p.a)%s;\n", secondary); break;
case GE_TEXFUNC_DECAL:
WRITE(p, " float4 v = float4(t.rgb, p.a)%s;\n", secondary); break;
case GE_TEXFUNC_BLEND:
WRITE(p, " float4 v = float4(lerp(p.rgb, u_texenv.rgb, t.rgb), p.a)%s;\n", secondary); break;
case GE_TEXFUNC_REPLACE:
WRITE(p, " float4 v = float4(t.rgb, p.a)%s;\n", secondary); break;
case GE_TEXFUNC_ADD:
WRITE(p, " float4 v = float4(p.rgb + t.rgb, p.a)%s;\n", secondary); break;
default:
WRITE(p, " float4 v = p;\n"); break;
}
}
} else {
// No texture mapping
WRITE(p, " float4 v = In.v_color0 %s;\n", secondary);
}
if (enableAlphaTest) {
GEComparison alphaTestFunc = gstate.getAlphaTestFunction();
const char *alphaTestFuncs[] = { "#", "#", " != ", " == ", " >= ", " > ", " <= ", " < " }; // never/always don't make sense
if (alphaTestFuncs[alphaTestFunc][0] != '#') {
// WRITE(p, " if (roundAndScaleTo255f(v.a) %s u_alphacolorref.a) discard;\n", alphaTestFuncs[alphaTestFunc]);
//WRITE(p, "clip((roundAndScaleTo255f(v.rgb) %s u_alphacolorref.a)? -1:1);\n", alphaTestFuncs[alphaTestFunc]);
//WRITE(p, " if (roundAndScaleTo255f(v.a) %s u_alphacolorref.a) clip(-1);\n", alphaTestFuncs[alphaTestFunc]);
WRITE(p, " if (roundTo255th(v.a) %s u_alphacolorref.a) clip(-1);\n", alphaTestFuncs[alphaTestFunc]);
//WRITE(p, " if (roundTo255th(v.a) %s u_alphacolorref.a) v.r=1;\n", alphaTestFuncs[alphaTestFunc]);
}
}
// TODO: Before or after the color test?
if (enableColorDoubling && enableAlphaDoubling) {
WRITE(p, " v = v * 2.0;\n");
} else if (enableColorDoubling) {
WRITE(p, " v.rgb = v.rgb * 2.0;\n");
} else if (enableAlphaDoubling) {
WRITE(p, " v.a = v.a * 2.0;\n");
}
if (enableColorTest) {
GEComparison colorTestFunc = gstate.getColorTestFunction();
const char *colorTestFuncs[] = { "#", "#", " != ", " == " }; // never/always don't make sense
u32 colorTestMask = gstate.getColorTestMask();
if (colorTestFuncs[colorTestFunc][0] != '#') {
//WRITE(p, "clip((roundAndScaleTo255v(v.rgb) %s u_alphacolorref.rgb)? -1:1);\n", colorTestFuncs[colorTestFunc]);
//WRITE(p, "if (roundAndScaleTo255v(v.rgb) %s u_alphacolorref.rgb) clip(-1);\n", colorTestFuncs[colorTestFunc]);
// cleanup ?
const char * test = colorTestFuncs[colorTestFunc];
//WRITE(p, "float3 colortest = roundAndScaleTo255v(v.rgb);\n");
WRITE(p, "float3 colortest = roundTo255thv(v.rgb);\n");
WRITE(p, "if ((colortest.r %s u_alphacolorref.r) && (colortest.g %s u_alphacolorref.g) && (colortest.b %s u_alphacolorref.b )) clip(-1);\n", test, test, test);
}
}
if (enableFog) {
WRITE(p, " float fogCoef = clamp(In.v_fogdepth, 0.0, 1.0);\n");
WRITE(p, " return lerp(float4(u_fogcolor, v.a), v, fogCoef);\n");
// WRITE(p, " v.x = v_depth;\n");
} else {
WRITE(p, " return v;\n");
}
}
WRITE(p, "}\n");
}
// Missing: Z depth range
void GenerateFragmentShader(char *buffer) {
char *p = buffer;
// In GLSL ES 3.0, you use "in" variables instead of varying.
bool glslES30 = false;
const char *varying = "varying";
const char *fragColor0 = "gl_FragColor";
const char *texture = "texture2D";
bool highpFog = false;
#if defined(USING_GLES2)
// Let's wait until we have a real use for this.
// ES doesn't support dual source alpha :(
if (gl_extensions.GLES3) {
WRITE(p, "#version 300 es\n"); // GLSL ES 1.0
fragColor0 = "fragColor0";
texture = "texture";
glslES30 = true;
} else {
WRITE(p, "#version 100\n"); // GLSL ES 1.0
}
WRITE(p, "precision lowp float;\n");
// PowerVR needs highp to do the fog in MHU correctly.
// Others don't, and some can't handle highp in the fragment shader.
highpFog = gl_extensions.gpuVendor == GPU_VENDOR_POWERVR;
// GL_NV_shader_framebuffer_fetch available on mobile platform and ES 2.0 only but not desktop
if (gl_extensions.NV_shader_framebuffer_fetch) {
WRITE(p, " #extension GL_NV_shader_framebuffer_fetch : require\n");
}
#elif !defined(FORCE_OPENGL_2_0)
if (gl_extensions.VersionGEThan(3, 3, 0)) {
fragColor0 = "fragColor0";
texture = "texture";
glslES30 = true;
WRITE(p, "#version 330\n");
} else if (gl_extensions.VersionGEThan(3, 0, 0)) {
fragColor0 = "fragColor0";
WRITE(p, "#version 130\n");
// Remove lowp/mediump in non-mobile non-glsl 3 implementations
WRITE(p, "#define lowp\n");
WRITE(p, "#define mediump\n");
WRITE(p, "#define highp\n");
} else {
WRITE(p, "#version 110\n");
// Remove lowp/mediump in non-mobile non-glsl 3 implementations
WRITE(p, "#define lowp\n");
WRITE(p, "#define mediump\n");
WRITE(p, "#define highp\n");
}
#else
// Need to remove lowp/mediump for Mac
WRITE(p, "#define lowp\n");
WRITE(p, "#define mediump\n");
WRITE(p, "#define highp\n");
#endif
if (glslES30) {
varying = "in";
}
bool lmode = gstate.isUsingSecondaryColor() && gstate.isLightingEnabled();
bool doTexture = gstate.isTextureMapEnabled() && !gstate.isModeClear();
bool enableFog = gstate.isFogEnabled() && !gstate.isModeThrough() && !gstate.isModeClear();
bool enableAlphaTest = gstate.isAlphaTestEnabled() && !IsAlphaTestTriviallyTrue() && !gstate.isModeClear();
bool alphaTestAgainstZero = gstate.getAlphaTestRef() == 0;
bool enableColorTest = gstate.isColorTestEnabled() && !IsColorTestTriviallyTrue() && !gstate.isModeClear();
bool alphaToColorDoubling = AlphaToColorDoubling();
bool enableColorDoubling = (gstate.isColorDoublingEnabled() && gstate.isTextureMapEnabled()) || alphaToColorDoubling;
// This isn't really correct, but it's a hack to get doubled blend modes to work more correctly.
bool enableAlphaDoubling = !alphaToColorDoubling && CanDoubleSrcBlendMode();
bool doTextureProjection = gstate.getUVGenMode() == GE_TEXMAP_TEXTURE_MATRIX;
bool doTextureAlpha = gstate.isTextureAlphaUsed();
ReplaceAlphaType stencilToAlpha = ReplaceAlphaWithStencil();
if (gstate_c.textureFullAlpha && gstate.getTextureFunction() != GE_TEXFUNC_REPLACE)
doTextureAlpha = false;
if (doTexture)
WRITE(p, "uniform sampler2D tex;\n");
if (ShouldUseShaderBlending() && !gstate.isModeClear()) {
if (!gl_extensions.NV_shader_framebuffer_fetch) {
WRITE(p, "uniform sampler2D fbotex;\n");
}
if (gstate.getBlendFuncA() == GE_SRCBLEND_FIXA) {
WRITE(p, "uniform vec3 u_blendFixA;\n");
}
if (gstate.getBlendFuncB() == GE_DSTBLEND_FIXB) {
WRITE(p, "uniform vec3 u_blendFixB;\n");
}
}
if (enableAlphaTest || enableColorTest) {
WRITE(p, "uniform vec4 u_alphacolorref;\n");
}
if (stencilToAlpha && ReplaceAlphaWithStencilType() == STENCIL_VALUE_UNIFORM) {
WRITE(p, "uniform float u_stencilReplaceValue;\n");
}
if (gstate.isTextureMapEnabled() && gstate.getTextureFunction() == GE_TEXFUNC_BLEND)
WRITE(p, "uniform vec3 u_texenv;\n");
WRITE(p, "%s vec4 v_color0;\n", varying);
if (lmode)
WRITE(p, "%s vec3 v_color1;\n", varying);
if (enableFog) {
WRITE(p, "uniform vec3 u_fogcolor;\n");
WRITE(p, "%s %s float v_fogdepth;\n", varying, highpFog ? "highp" : "mediump");
}
if (doTexture) {
if (doTextureProjection)
WRITE(p, "%s mediump vec3 v_texcoord;\n", varying);
else
WRITE(p, "%s mediump vec2 v_texcoord;\n", varying);
}
if (enableAlphaTest && !alphaTestAgainstZero) {
if (gl_extensions.gpuVendor == GPU_VENDOR_POWERVR)
WRITE(p, "float roundTo255thf(in mediump float x) { mediump float y = x + (0.5/255.0); return y - fract(y * 255.0) * (1.0 / 255.0); }\n");
else
WRITE(p, "float roundAndScaleTo255f(in float x) { return floor(x * 255.0 + 0.5); }\n");
}
if (enableColorTest) {
if (gl_extensions.gpuVendor == GPU_VENDOR_POWERVR)
WRITE(p, "vec3 roundTo255thv(in vec3 x) { vec3 y = x + (0.5/255.0); return y - fract(y * 255.0) * (1.0 / 255.0); }\n");
else
WRITE(p, "vec3 roundAndScaleTo255v(in vec3 x) { return floor(x * 255.0 + 0.5); }\n");
}
if (stencilToAlpha == REPLACE_ALPHA_DUALSOURCE) {
WRITE(p, "out vec4 fragColor0;\n");
WRITE(p, "out vec4 fragColor1;\n");
} else if (!strcmp(fragColor0, "fragColor0")) {
WRITE(p, "out vec4 fragColor0;\n");
}
WRITE(p, "void main() {\n");
if (gstate.isModeClear()) {
// Clear mode does not allow any fancy shading.
WRITE(p, " vec4 v = v_color0;\n");
} else {
const char *secondary = "";
// Secondary color for specular on top of texture
if (lmode) {
WRITE(p, " vec4 s = vec4(v_color1, 0.0);\n");
secondary = " + s";
} else {
secondary = "";
}
if (gstate.isTextureMapEnabled()) {
if (doTextureProjection) {
WRITE(p, " vec4 t = %sProj(tex, v_texcoord);\n", texture);
} else {
WRITE(p, " vec4 t = %s(tex, v_texcoord);\n", texture);
}
WRITE(p, " vec4 p = v_color0;\n");
if (doTextureAlpha) { // texfmt == RGBA
switch (gstate.getTextureFunction()) {
case GE_TEXFUNC_MODULATE:
WRITE(p, " vec4 v = p * t%s;\n", secondary);
break;
case GE_TEXFUNC_DECAL:
WRITE(p, " vec4 v = vec4(mix(p.rgb, t.rgb, t.a), p.a)%s;\n", secondary);
break;
case GE_TEXFUNC_BLEND:
WRITE(p, " vec4 v = vec4(mix(p.rgb, u_texenv.rgb, t.rgb), p.a * t.a)%s;\n", secondary);
break;
case GE_TEXFUNC_REPLACE:
WRITE(p, " vec4 v = t%s;\n", secondary);
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", secondary);
break;
default:
WRITE(p, " vec4 v = p;\n"); break;
}
} else { // texfmt == RGB
switch (gstate.getTextureFunction()) {
case GE_TEXFUNC_MODULATE:
WRITE(p, " vec4 v = vec4(t.rgb * p.rgb, p.a)%s;\n", secondary);
break;
case GE_TEXFUNC_DECAL:
WRITE(p, " vec4 v = vec4(t.rgb, p.a)%s;\n", secondary);
break;
case GE_TEXFUNC_BLEND:
WRITE(p, " vec4 v = vec4(mix(p.rgb, u_texenv.rgb, t.rgb), p.a)%s;\n", secondary);
break;
case GE_TEXFUNC_REPLACE:
WRITE(p, " vec4 v = vec4(t.rgb, p.a)%s;\n", secondary);
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", secondary); break;
default:
WRITE(p, " vec4 v = p;\n"); break;
}
}
} else {
// No texture mapping
WRITE(p, " vec4 v = v_color0 %s;\n", secondary);
}
if (enableAlphaTest) {
GEComparison alphaTestFunc = gstate.getAlphaTestFunction();
const char *alphaTestFuncs[] = { "#", "#", " != ", " == ", " >= ", " > ", " <= ", " < " }; // never/always don't make sense
if (alphaTestFuncs[alphaTestFunc][0] != '#') {
if (alphaTestAgainstZero) {
// When testing against 0 (extremely common), we can avoid some math.
// 0.002 is approximately half of 1.0 / 255.0.
if (alphaTestFunc == GE_COMP_NOTEQUAL || alphaTestFunc == GE_COMP_GREATER) {
WRITE(p, " if (v.a < 0.002) discard;\n");
} else {
// Anything else is a test for == 0. Happens sometimes, actually...
WRITE(p, " if (v.a > 0.002) discard;\n");
}
} else if (gl_extensions.gpuVendor == GPU_VENDOR_POWERVR) {
// Work around bad PVR driver problem where equality check + discard just doesn't work.
if (alphaTestFunc != GE_COMP_NOTEQUAL)
WRITE(p, " if (roundTo255thf(v.a) %s u_alphacolorref.a) discard;\n", alphaTestFuncs[alphaTestFunc]);
} else {
WRITE(p, " if (roundAndScaleTo255f(v.a) %s u_alphacolorref.a) discard;\n", alphaTestFuncs[alphaTestFunc]);
}
}
}
if (enableColorTest) {
GEComparison colorTestFunc = gstate.getColorTestFunction();
const char *colorTestFuncs[] = { "#", "#", " != ", " == " }; // never/always don't make sense
WARN_LOG_REPORT_ONCE(colortest, G3D, "Color test function : %s", colorTestFuncs[colorTestFunc]);
u32 colorTestMask = gstate.getColorTestMask();
if (colorTestFuncs[colorTestFunc][0] != '#') {
if (gl_extensions.gpuVendor == GPU_VENDOR_POWERVR)
WRITE(p, " if (roundTo255thv(v.rgb) %s u_alphacolorref.rgb) discard;\n", colorTestFuncs[colorTestFunc]);
else
WRITE(p, " if (roundAndScaleTo255v(v.rgb) %s u_alphacolorref.rgb) discard;\n", colorTestFuncs[colorTestFunc]);
}
}
// Color doubling happens after the color test.
if (enableColorDoubling && enableAlphaDoubling) {
WRITE(p, " v = v * 2.0;\n");
} else if (enableColorDoubling) {
WRITE(p, " v.rgb = v.rgb * 2.0;\n");
} else if (enableAlphaDoubling) {
WRITE(p, " v.a = v.a * 2.0;\n");
}
if (enableFog) {
WRITE(p, " float fogCoef = clamp(v_fogdepth, 0.0, 1.0);\n");
WRITE(p, " v = mix(vec4(u_fogcolor, v.a), v, fogCoef);\n");
// WRITE(p, " v.x = v_depth;\n");
}
if (ShouldUseShaderBlending()) {
// If we have NV_shader_framebuffer_fetch / EXT_shader_framebuffer_fetch, we skip the blit.
// We can just read the prev value more directly.
// TODO: EXT_shader_framebuffer_fetch on iOS 6, possibly others.
if (gl_extensions.NV_shader_framebuffer_fetch) {
WRITE(p, " lowp vec4 destColor = gl_LastFragData[0];\n");
} else {
WRITE(p, " lowp vec4 destColor = texelFetch(fbotex, ivec2(gl_FragCoord.x, gl_FragCoord.y), 0);\n");
}
GEBlendSrcFactor funcA = gstate.getBlendFuncA();
GEBlendDstFactor funcB = gstate.getBlendFuncB();
GEBlendMode eq = gstate.getBlendEq();
const char *srcFactor = "vec3(1.0)";
const char *dstFactor = "vec3(0.0)";
switch (funcA)
{
case GE_SRCBLEND_DSTCOLOR: srcFactor = "destColor.rgb"; break;
case GE_SRCBLEND_INVDSTCOLOR: srcFactor = "(vec3(1.0) - destColor.rgb)"; break;
case GE_SRCBLEND_SRCALPHA: srcFactor = "vec3(v.a)"; break;
case GE_SRCBLEND_INVSRCALPHA: srcFactor = "vec3(1.0 - v.a)"; break;
case GE_SRCBLEND_DSTALPHA: srcFactor = "vec3(destColor.a)"; break;
case GE_SRCBLEND_INVDSTALPHA: srcFactor = "vec3(1.0 - destColor.a)"; break;
case GE_SRCBLEND_DOUBLESRCALPHA: srcFactor = "vec3(v.a * 2.0)"; break;
// TODO: Double inverse, or inverse double? Following softgpu for now...
case GE_SRCBLEND_DOUBLEINVSRCALPHA: srcFactor = "vec3(1.0 - v.a * 2.0)"; break;
case GE_SRCBLEND_DOUBLEDSTALPHA: srcFactor = "vec3(destColor.a * 2.0)"; break;
case GE_SRCBLEND_DOUBLEINVDSTALPHA: srcFactor = "vec3(1.0 - destColor.a * 2.0)"; break;
case GE_SRCBLEND_FIXA: srcFactor = "u_blendFixA"; break;
}
switch (funcB)
{
case GE_DSTBLEND_SRCCOLOR: dstFactor = "v.rgb"; break;
case GE_DSTBLEND_INVSRCCOLOR: dstFactor = "(vec3(1.0) - v.rgb)"; break;
case GE_DSTBLEND_SRCALPHA: dstFactor = "vec3(v.a)"; break;
case GE_DSTBLEND_INVSRCALPHA: dstFactor = "vec3(1.0 - v.a)"; break;
case GE_DSTBLEND_DSTALPHA: dstFactor = "vec3(destColor.a)"; break;
case GE_DSTBLEND_INVDSTALPHA: dstFactor = "vec3(1.0 - destColor.a)"; break;
case GE_DSTBLEND_DOUBLESRCALPHA: dstFactor = "vec3(v.a * 2.0)"; break;
case GE_DSTBLEND_DOUBLEINVSRCALPHA: dstFactor = "vec3(1.0 - v.a * 2.0)"; break;
case GE_DSTBLEND_DOUBLEDSTALPHA: dstFactor = "vec3(destColor.a * 2.0)"; break;
case GE_DSTBLEND_DOUBLEINVDSTALPHA: dstFactor = "vec3(1.0 - destColor.a * 2.0)"; break;
case GE_DSTBLEND_FIXB: dstFactor = "u_blendFixB"; break;
}
switch (eq)
{
case GE_BLENDMODE_MUL_AND_ADD:
WRITE(p, " v.rgb = v.rgb * %s + destColor.rgb * %s;\n", srcFactor, dstFactor);
break;
case GE_BLENDMODE_MUL_AND_SUBTRACT:
WRITE(p, " v.rgb = v.rgb * %s - destColor.rgb * %s;\n", srcFactor, dstFactor);
break;
case GE_BLENDMODE_MUL_AND_SUBTRACT_REVERSE:
WRITE(p, " v.rgb = destColor.rgb * %s - v.rgb * %s;\n", srcFactor, dstFactor);
break;
case GE_BLENDMODE_MIN:
WRITE(p, " v.rgb = min(v.rgb, destColor.rgb);\n");
break;
case GE_BLENDMODE_MAX:
WRITE(p, " v.rgb = max(v.rgb, destColor.rgb);\n");
break;
case GE_BLENDMODE_ABSDIFF:
WRITE(p, " v.rgb = abs(v.rgb - destColor.rgb);\n");
break;
}
}
}
switch (stencilToAlpha) {
case REPLACE_ALPHA_DUALSOURCE:
WRITE(p, " fragColor0 = vec4(v.rgb, 0.0);\n");
WRITE(p, " fragColor1 = vec4(0.0, 0.0, 0.0, v.a);\n");
break;
case REPLACE_ALPHA_YES:
WRITE(p, " %s = vec4(v.rgb, 0.0);\n", fragColor0);
break;
case REPLACE_ALPHA_NO:
WRITE(p, " %s = v;\n", fragColor0);
break;
}
if (stencilToAlpha != REPLACE_ALPHA_NO) {
switch (ReplaceAlphaWithStencilType()) {
case STENCIL_VALUE_UNIFORM:
WRITE(p, " %s.a = u_stencilReplaceValue;\n", fragColor0);
break;
case STENCIL_VALUE_ZERO:
WRITE(p, " %s.a = 0.0;\n", fragColor0);
break;
case STENCIL_VALUE_ONE:
WRITE(p, " %s.a = 1.0;\n", fragColor0);
break;
case STENCIL_VALUE_UNKNOWN:
// Maybe we should even mask away alpha using glColorMask and not change it at all? We do get here
// if the stencil mode is KEEP for example.
WRITE(p, " %s.a = 0.0;\n", fragColor0);
break;
case STENCIL_VALUE_KEEP:
// Do nothing. We'll mask out the alpha using color mask.
break;
}
}
#ifdef DEBUG_SHADER
if (doTexture) {
WRITE(p, " %s = texture2D(tex, v_texcoord.xy);\n", fragColor0);
WRITE(p, " %s += vec4(0.3,0,0.3,0.3);\n", fragColor0);
} else {
WRITE(p, " %s = vec4(1,0,1,1);\n", fragColor0);
}
#endif
WRITE(p, "}\n");
}
// Here we must take all the bits of the gstate that determine what the fragment shader will
// look like, and concatenate them together into an ID.
void ComputeFragmentShaderID(FragmentShaderID *id) {
int id0 = 0;
int id1 = 0;
if (gstate.isModeClear()) {
// We only need one clear shader, so let's ignore the rest of the bits.
id0 = 1;
} else {
bool lmode = gstate.isUsingSecondaryColor() && gstate.isLightingEnabled();
bool enableFog = gstate.isFogEnabled() && !gstate.isModeThrough();
bool enableAlphaTest = gstate.isAlphaTestEnabled() && !IsAlphaTestTriviallyTrue();
bool alphaTestAgainstZero = gstate.getAlphaTestRef() == 0;
bool enableColorTest = gstate.isColorTestEnabled() && !IsColorTestTriviallyTrue();
bool alphaToColorDoubling = AlphaToColorDoubling();
bool enableColorDoubling = (gstate.isColorDoublingEnabled() && gstate.isTextureMapEnabled()) || alphaToColorDoubling;
// This isn't really correct, but it's a hack to get doubled blend modes to work more correctly.
bool enableAlphaDoubling = !alphaToColorDoubling && CanDoubleSrcBlendMode();
bool doTextureProjection = gstate.getUVGenMode() == GE_TEXMAP_TEXTURE_MATRIX;
bool doTextureAlpha = gstate.isTextureAlphaUsed();
ReplaceAlphaType stencilToAlpha = ReplaceAlphaWithStencil();
// All texfuncs except replace are the same for RGB as for RGBA with full alpha.
if (gstate_c.textureFullAlpha && gstate.getTextureFunction() != GE_TEXFUNC_REPLACE)
doTextureAlpha = false;
// id0 |= (gstate.isModeClear() & 1);
if (gstate.isTextureMapEnabled()) {
id0 |= 1 << 1;
id0 |= gstate.getTextureFunction() << 2;
id0 |= (doTextureAlpha & 1) << 5; // rgb or rgba
}
// 6 is free.
id0 |= (lmode & 1) << 7;
if (enableAlphaTest) {
id0 |= 1 << 8;
id0 |= gstate.getAlphaTestFunction() << 9;
}
if (enableColorTest) {
id0 |= 1 << 12;
id0 |= gstate.getColorTestFunction() << 13; // color test func
}
id0 |= (enableFog & 1) << 15;
id0 |= (doTextureProjection & 1) << 16;
id0 |= (enableColorDoubling & 1) << 17;
id0 |= (enableAlphaDoubling & 1) << 18;
id0 |= (stencilToAlpha) << 19;
if (stencilToAlpha != REPLACE_ALPHA_NO) {
// 3 bits
id0 |= ReplaceAlphaWithStencilType() << 21;
}
id0 |= (alphaTestAgainstZero & 1) << 24;
if (enableAlphaTest)
gpuStats.numAlphaTestedDraws++;
else
gpuStats.numNonAlphaTestedDraws++;
if (ShouldUseShaderBlending()) {
// 12 bits total.
id1 |= 1;
id1 |= (gstate.getBlendEq() << 1);
id1 |= (gstate.getBlendFuncA() << 4);
id1 |= (gstate.getBlendFuncB() << 8);
}
}
id->d[0] = id0;
id->d[1] = id1;
}