// prim so we can special case for RECTANGLES :(
void ComputeVertexShaderID(VertexShaderID *id, u32 vertType, int prim, bool useHWTransform) {
bool doTexture = gstate.isTextureMapEnabled() && !gstate.isModeClear();
bool doTextureProjection = gstate.getUVGenMode() == GE_TEXMAP_TEXTURE_MATRIX;
bool doShadeMapping = gstate.getUVGenMode() == GE_TEXMAP_ENVIRONMENT_MAP;
bool hasColor = (vertType & GE_VTYPE_COL_MASK) != 0;
bool hasNormal = (vertType & GE_VTYPE_NRM_MASK) != 0;
bool hasTexcoord = (vertType & GE_VTYPE_TC_MASK) != 0;
bool enableFog = gstate.isFogEnabled() && !gstate.isModeThrough() && !gstate.isModeClear();
bool lmode = gstate.isUsingSecondaryColor() && gstate.isLightingEnabled();
memset(id->d, 0, sizeof(id->d));
id->d[0] = lmode & 1;
id->d[0] |= ((int)gstate.isModeThrough()) << 1;
id->d[0] |= ((int)enableFog) << 2;
id->d[0] |= (doTexture & 1) << 3;
id->d[0] |= (hasColor & 1) << 4;
if (doTexture) {
id->d[0] |= (gstate_c.flipTexture & 1) << 5;
id->d[0] |= (doTextureProjection & 1) << 6;
}
if (useHWTransform) {
id->d[0] |= 1 << 8;
id->d[0] |= (hasNormal & 1) << 9;
// UV generation mode
id->d[0] |= gstate.getUVGenMode() << 16;
// The next bits are used differently depending on UVgen mode
if (doTextureProjection) {
id->d[0] |= gstate.getUVProjMode() << 18;
} else if (doShadeMapping) {
id->d[0] |= gstate.getUVLS0() << 18;
id->d[0] |= gstate.getUVLS1() << 20;
}
// Bones
if (vertTypeIsSkinningEnabled(vertType))
id->d[0] |= (TranslateNumBones(vertTypeGetNumBoneWeights(vertType)) - 1) << 22;
// Okay, d[1] coming up. ==============
if (gstate.isLightingEnabled() || doShadeMapping) {
// Light bits
for (int i = 0; i < 4; i++) {
id->d[1] |= gstate.getLightComputation(i) << (i * 4);
id->d[1] |= gstate.getLightType(i) << (i * 4 + 2);
}
id->d[1] |= (gstate.materialupdate & 7) << 16;
for (int i = 0; i < 4; i++) {
id->d[1] |= (gstate.isLightChanEnabled(i) & 1) << (20 + i);
}
}
id->d[1] |= gstate.isLightingEnabled() << 24;
id->d[1] |= (vertTypeGetWeightMask(vertType) >> GE_VTYPE_WEIGHT_SHIFT) << 25;
id->d[1] |= gstate.areNormalsReversed() << 26;
if (doTextureProjection && gstate.getUVProjMode() == GE_PROJMAP_UV) {
id->d[1] |= ((vertType & GE_VTYPE_TC_MASK) >> GE_VTYPE_TC_SHIFT) << 27; // two bits
} else {
void GenerateVertexShader(int prim, u32 vertType, char *buffer, bool useHWTransform) {
char *p = buffer;
// #define USE_FOR_LOOP
#if defined(USING_GLES2)
WRITE(p, "#version 100\n"); // GLSL ES 1.0
WRITE(p, "precision highp float;\n");
#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
// Need to remove lowp/mediump for Mac
WRITE(p, "#define lowp\n");
WRITE(p, "#define mediump\n");
WRITE(p, "#define highp\n");
#endif
int lmode = gstate.isUsingSecondaryColor() && gstate.isLightingEnabled();
int doTexture = gstate.isTextureMapEnabled() && !gstate.isModeClear();
bool doTextureProjection = gstate.getUVGenMode() == GE_TEXMAP_TEXTURE_MATRIX;
bool doShadeMapping = gstate.getUVGenMode() == GE_TEXMAP_ENVIRONMENT_MAP;
bool hasColor = (vertType & GE_VTYPE_COL_MASK) != 0 || !useHWTransform;
bool hasNormal = (vertType & GE_VTYPE_NRM_MASK) != 0 && useHWTransform;
bool enableFog = gstate.isFogEnabled() && !gstate.isModeThrough() && !gstate.isModeClear();
bool throughmode = (vertType & GE_VTYPE_THROUGH_MASK) != 0;
bool flipV = gstate_c.flipTexture; // This also means that we are texturing from a render target
bool flipNormal = gstate.areNormalsReversed();
DoLightComputation doLight[4] = {LIGHT_OFF, LIGHT_OFF, LIGHT_OFF, LIGHT_OFF};
if (useHWTransform) {
int shadeLight0 = doShadeMapping ? gstate.getUVLS0() : -1;
int shadeLight1 = doShadeMapping ? gstate.getUVLS1() : -1;
for (int i = 0; i < 4; i++) {
if (i == shadeLight0 || i == shadeLight1)
doLight[i] = LIGHT_SHADE;
if (gstate.isLightingEnabled() && gstate.isLightChanEnabled(i))
doLight[i] = LIGHT_FULL;
}
}
if (vertTypeIsSkinningEnabled(vertType)) {
WRITE(p, "%s", boneWeightAttrDecl[TranslateNumBones(vertTypeGetNumBoneWeights(vertType))]);
}
if (useHWTransform)
WRITE(p, "attribute vec3 position;\n");
else
WRITE(p, "attribute vec4 position;\n"); // need to pass the fog coord in w
if (useHWTransform && hasNormal)
WRITE(p, "attribute mediump vec3 normal;\n");
if (doTexture) {
if (!useHWTransform && doTextureProjection)
WRITE(p, "attribute vec3 texcoord;\n");
else
WRITE(p, "attribute vec2 texcoord;\n");
}
if (hasColor) {
WRITE(p, "attribute lowp vec4 color0;\n");
if (lmode && !useHWTransform) // only software transform supplies color1 as vertex data
WRITE(p, "attribute lowp vec3 color1;\n");
}
if (gstate.isModeThrough()) {
WRITE(p, "uniform mat4 u_proj_through;\n");
} else {
WRITE(p, "uniform mat4 u_proj;\n");
// Add all the uniforms we'll need to transform properly.
}
bool prescale = g_Config.bPrescaleUV && !throughmode && gstate.getTextureFunction() == 0;
if (useHWTransform) {
// When transforming by hardware, we need a great deal more uniforms...
WRITE(p, "uniform mat4 u_world;\n");
WRITE(p, "uniform mat4 u_view;\n");
if (doTextureProjection)
WRITE(p, "uniform mediump mat4 u_texmtx;\n");
if (vertTypeIsSkinningEnabled(vertType)) {
int numBones = TranslateNumBones(vertTypeGetNumBoneWeights(vertType));
#ifdef USE_BONE_ARRAY
WRITE(p, "uniform mediump mat4 u_bone[%i];\n", numBones);
#else
for (int i = 0; i < numBones; i++) {
WRITE(p, "uniform mat4 u_bone%i;\n", i);
}
#endif
}
if (doTexture && (flipV || !prescale || gstate.getUVGenMode() == GE_TEXMAP_ENVIRONMENT_MAP || gstate.getUVGenMode() == GE_TEXMAP_TEXTURE_MATRIX)) {
WRITE(p, "uniform vec4 u_uvscaleoffset;\n");
}
for (int i = 0; i < 4; i++) {
if (doLight[i] != LIGHT_OFF) {
// This is needed for shade mapping
WRITE(p, "uniform vec3 u_lightpos%i;\n", i);
}
if (doLight[i] == LIGHT_FULL) {
GELightType type = gstate.getLightType(i);
if (type != GE_LIGHTTYPE_DIRECTIONAL)
WRITE(p, "uniform mediump vec3 u_lightatt%i;\n", i);
if (type == GE_LIGHTTYPE_SPOT || type == GE_LIGHTTYPE_UNKNOWN) {
WRITE(p, "uniform mediump vec3 u_lightdir%i;\n", i);
WRITE(p, "uniform mediump float u_lightangle%i;\n", i);
WRITE(p, "uniform mediump float u_lightspotCoef%i;\n", i);
}
WRITE(p, "uniform lowp vec3 u_lightambient%i;\n", i);
WRITE(p, "uniform lowp vec3 u_lightdiffuse%i;\n", i);
if (gstate.isUsingSpecularLight(i))
WRITE(p, "uniform lowp vec3 u_lightspecular%i;\n", i);
}
}
if (gstate.isLightingEnabled()) {
WRITE(p, "uniform lowp vec4 u_ambient;\n");
if ((gstate.materialupdate & 2) == 0)
WRITE(p, "uniform lowp vec3 u_matdiffuse;\n");
// if ((gstate.materialupdate & 4) == 0)
WRITE(p, "uniform lowp vec4 u_matspecular;\n"); // Specular coef is contained in alpha
WRITE(p, "uniform lowp vec3 u_matemissive;\n");
}
}
if (useHWTransform || !hasColor)
WRITE(p, "uniform lowp vec4 u_matambientalpha;\n"); // matambient + matalpha
if (enableFog) {
WRITE(p, "uniform highp vec2 u_fogcoef;\n");
}
WRITE(p, "varying lowp vec4 v_color0;\n");
if (lmode) WRITE(p, "varying lowp vec3 v_color1;\n");
if (doTexture) {
if (doTextureProjection)
WRITE(p, "varying mediump vec3 v_texcoord;\n");
else
WRITE(p, "varying mediump vec2 v_texcoord;\n");
}
if (enableFog) {
// See the fragment shader generator
if (gl_extensions.gpuVendor == GPU_VENDOR_POWERVR) {
WRITE(p, "varying highp float v_fogdepth;\n");
} else {
WRITE(p, "varying mediump float v_fogdepth;\n");
}
}
WRITE(p, "void main() {\n");
if (!useHWTransform) {
// Simple pass-through of vertex data to fragment shader
if (doTexture)
WRITE(p, " v_texcoord = texcoord;\n");
if (hasColor) {
WRITE(p, " v_color0 = color0;\n");
if (lmode)
WRITE(p, " v_color1 = color1;\n");
} else {
WRITE(p, " v_color0 = u_matambientalpha;\n");
if (lmode)
WRITE(p, " v_color1 = vec3(0.0);\n");
}
if (enableFog) {
WRITE(p, " v_fogdepth = position.w;\n");
}
if (gstate.isModeThrough()) {
WRITE(p, " gl_Position = u_proj_through * vec4(position.xyz, 1.0);\n");
} else {
WRITE(p, " gl_Position = u_proj * vec4(position.xyz, 1.0);\n");
}
} else {
// Step 1: World Transform / Skinning
if (!vertTypeIsSkinningEnabled(vertType)) {
// No skinning, just standard T&L.
WRITE(p, " vec3 worldpos = (u_world * vec4(position.xyz, 1.0)).xyz;\n");
if (hasNormal)
WRITE(p, " mediump vec3 worldnormal = normalize((u_world * vec4(%snormal, 0.0)).xyz);\n", flipNormal ? "-" : "");
else
WRITE(p, " mediump vec3 worldnormal = vec3(0.0, 0.0, 1.0);\n");
} else {
int numWeights = TranslateNumBones(vertTypeGetNumBoneWeights(vertType));
static const char *rescale[4] = {"", " * 1.9921875", " * 1.999969482421875", ""}; // 2*127.5f/128.f, 2*32767.5f/32768.f, 1.0f};
const char *factor = rescale[vertTypeGetWeightMask(vertType) >> GE_VTYPE_WEIGHT_SHIFT];
static const char * const boneWeightAttr[8] = {
"w1.x", "w1.y", "w1.z", "w1.w",
"w2.x", "w2.y", "w2.z", "w2.w",
};
#if defined(USE_FOR_LOOP) && defined(USE_BONE_ARRAY)
// To loop through the weights, we unfortunately need to put them in a float array.
// GLSL ES sucks - no way to directly initialize an array!
switch (numWeights) {
case 1: WRITE(p, " float w[1]; w[0] = w1;\n"); break;
case 2: WRITE(p, " float w[2]; w[0] = w1.x; w[1] = w1.y;\n"); break;
case 3: WRITE(p, " float w[3]; w[0] = w1.x; w[1] = w1.y; w[2] = w1.z;\n"); break;
case 4: WRITE(p, " float w[4]; w[0] = w1.x; w[1] = w1.y; w[2] = w1.z; w[3] = w1.w;\n"); break;
case 5: WRITE(p, " float w[5]; w[0] = w1.x; w[1] = w1.y; w[2] = w1.z; w[3] = w1.w; w[4] = w2;\n"); break;
case 6: WRITE(p, " float w[6]; w[0] = w1.x; w[1] = w1.y; w[2] = w1.z; w[3] = w1.w; w[4] = w2.x; w[5] = w2.y;\n"); break;
case 7: WRITE(p, " float w[7]; w[0] = w1.x; w[1] = w1.y; w[2] = w1.z; w[3] = w1.w; w[4] = w2.x; w[5] = w2.y; w[6] = w2.z;\n"); break;
case 8: WRITE(p, " float w[8]; w[0] = w1.x; w[1] = w1.y; w[2] = w1.z; w[3] = w1.w; w[4] = w2.x; w[5] = w2.y; w[6] = w2.z; w[7] = w2.w;\n"); break;
}
WRITE(p, " mat4 skinMatrix = w[0] * u_bone[0];\n");
if (numWeights > 1) {
WRITE(p, " for (int i = 1; i < %i; i++) {\n", numWeights);
WRITE(p, " skinMatrix += w[i] * u_bone[i];\n");
WRITE(p, " }\n");
}
#else
#ifdef USE_BONE_ARRAY
if (numWeights == 1)
WRITE(p, " mat4 skinMatrix = w1 * u_bone[0]");
else
WRITE(p, " mat4 skinMatrix = w1.x * u_bone[0]");
for (int i = 1; i < numWeights; i++) {
const char *weightAttr = boneWeightAttr[i];
// workaround for "cant do .x of scalar" issue
if (numWeights == 1 && i == 0) weightAttr = "w1";
if (numWeights == 5 && i == 4) weightAttr = "w2";
WRITE(p, " + %s * u_bone[%i]", weightAttr, i);
}
#else
// Uncomment this to screw up bone shaders to check the vertex shader software fallback
// WRITE(p, "THIS SHOULD ERROR! #error");
if (numWeights == 1)
WRITE(p, " mat4 skinMatrix = w1 * u_bone0");
else
WRITE(p, " mat4 skinMatrix = w1.x * u_bone0");
for (int i = 1; i < numWeights; i++) {
const char *weightAttr = boneWeightAttr[i];
// workaround for "cant do .x of scalar" issue
if (numWeights == 1 && i == 0) weightAttr = "w1";
if (numWeights == 5 && i == 4) weightAttr = "w2";
WRITE(p, " + %s * u_bone%i", weightAttr, i);
}
#endif
#endif
WRITE(p, ";\n");
// Trying to simplify this results in bugs in LBP...
WRITE(p, " vec3 skinnedpos = (skinMatrix * vec4(position, 1.0)).xyz %s;\n", factor);
WRITE(p, " vec3 worldpos = (u_world * vec4(skinnedpos, 1.0)).xyz;\n");
if (hasNormal) {
WRITE(p, " mediump vec3 skinnednormal = (skinMatrix * vec4(%snormal, 0.0)).xyz %s;\n", flipNormal ? "-" : "", factor);
WRITE(p, " mediump vec3 worldnormal = normalize((u_world * vec4(skinnednormal, 0.0)).xyz);\n");
} else {
WRITE(p, " mediump vec3 worldnormal = (u_world * (skinMatrix * vec4(0.0, 0.0, 1.0, 0.0))).xyz;\n");
}
}
WRITE(p, " vec4 viewPos = u_view * vec4(worldpos, 1.0);\n");
// Final view and projection transforms.
WRITE(p, " gl_Position = u_proj * viewPos;\n");
// TODO: Declare variables for dots for shade mapping if needed.
const char *ambientStr = (gstate.materialupdate & 1) ? (hasColor ? "color0" : "u_matambientalpha") : "u_matambientalpha";
const char *diffuseStr = (gstate.materialupdate & 2) ? (hasColor ? "color0.rgb" : "u_matambientalpha.rgb") : "u_matdiffuse";
const char *specularStr = (gstate.materialupdate & 4) ? (hasColor ? "color0.rgb" : "u_matambientalpha.rgb") : "u_matspecular.rgb";
bool diffuseIsZero = true;
bool specularIsZero = true;
bool distanceNeeded = false;
if (gstate.isLightingEnabled()) {
WRITE(p, " lowp vec4 lightSum0 = u_ambient * %s + vec4(u_matemissive, 0.0);\n", ambientStr);
for (int i = 0; i < 4; i++) {
if (doLight[i] != LIGHT_FULL)
continue;
diffuseIsZero = false;
if (gstate.isUsingSpecularLight(i))
specularIsZero = false;
GELightType type = gstate.getLightType(i);
if (type != GE_LIGHTTYPE_DIRECTIONAL)
distanceNeeded = true;
}
if (!specularIsZero) {
WRITE(p, " lowp vec3 lightSum1 = vec3(0.0);\n");
}
if (!diffuseIsZero) {
WRITE(p, " vec3 toLight;\n");
WRITE(p, " lowp vec3 diffuse;\n");
}
if (distanceNeeded) {
WRITE(p, " float distance;\n");
WRITE(p, " lowp float lightScale;\n");
}
}
// Calculate lights if needed. If shade mapping is enabled, lights may need to be
// at least partially calculated.
for (int i = 0; i < 4; i++) {
if (doLight[i] != LIGHT_FULL)
continue;
GELightType type = gstate.getLightType(i);
if (type == GE_LIGHTTYPE_DIRECTIONAL) {
// We prenormalize light positions for directional lights.
WRITE(p, " toLight = u_lightpos%i;\n", i);
} else {
WRITE(p, " toLight = u_lightpos%i - worldpos;\n", i);
WRITE(p, " distance = length(toLight);\n");
WRITE(p, " toLight /= distance;\n");
}
bool doSpecular = gstate.isUsingSpecularLight(i);
bool poweredDiffuse = gstate.isUsingPoweredDiffuseLight(i);
if (poweredDiffuse) {
WRITE(p, " mediump float dot%i = pow(dot(toLight, worldnormal), u_matspecular.a);\n", i);
// Ugly NaN check. pow(0.0, 0.0) may be undefined, but PSP seems to treat it as 1.0.
// Seen in Tales of the World: Radiant Mythology (#2424.)
WRITE(p, " if (!(dot%i < 1.0) && !(dot%i > 0.0))\n", i, i);
WRITE(p, " dot%i = 1.0;\n", i);
} else {
WRITE(p, " mediump float dot%i = dot(toLight, worldnormal);\n", i);
}
const char *timesLightScale = " * lightScale";
// Attenuation
switch (type) {
case GE_LIGHTTYPE_DIRECTIONAL:
timesLightScale = "";
break;
case GE_LIGHTTYPE_POINT:
WRITE(p, " lightScale = clamp(1.0 / dot(u_lightatt%i, vec3(1.0, distance, distance*distance)), 0.0, 1.0);\n", i);
break;
case GE_LIGHTTYPE_SPOT:
case GE_LIGHTTYPE_UNKNOWN:
WRITE(p, " lowp float angle%i = dot(normalize(u_lightdir%i), toLight);\n", i, i);
WRITE(p, " if (angle%i >= u_lightangle%i) {\n", i, i);
WRITE(p, " lightScale = clamp(1.0 / dot(u_lightatt%i, vec3(1.0, distance, distance*distance)), 0.0, 1.0) * pow(angle%i, u_lightspotCoef%i);\n", i, i, i);
WRITE(p, " } else {\n");
WRITE(p, " lightScale = 0.0;\n");
WRITE(p, " }\n");
break;
default:
// ILLEGAL
break;
}
WRITE(p, " diffuse = (u_lightdiffuse%i * %s) * max(dot%i, 0.0);\n", i, diffuseStr, i);
if (doSpecular) {
WRITE(p, " dot%i = dot(normalize(toLight + vec3(0.0, 0.0, 1.0)), worldnormal);\n", i);
WRITE(p, " if (dot%i > 0.0)\n", i);
WRITE(p, " lightSum1 += u_lightspecular%i * %s * (pow(dot%i, u_matspecular.a) %s);\n", i, specularStr, i, timesLightScale);
}
WRITE(p, " lightSum0.rgb += (u_lightambient%i * %s.rgb + diffuse)%s;\n", i, ambientStr, timesLightScale);
}
if (gstate.isLightingEnabled()) {
// Sum up ambient, emissive here.
if (lmode) {
WRITE(p, " v_color0 = clamp(lightSum0, 0.0, 1.0);\n");
// v_color1 only exists when lmode = 1.
if (specularIsZero) {
WRITE(p, " v_color1 = vec3(0.0);\n");
} else {
WRITE(p, " v_color1 = clamp(lightSum1, 0.0, 1.0);\n");
}
} else {
if (specularIsZero) {
WRITE(p, " v_color0 = clamp(lightSum0, 0.0, 1.0);\n");
} else {
WRITE(p, " v_color0 = clamp(clamp(lightSum0, 0.0, 1.0) + vec4(lightSum1, 0.0), 0.0, 1.0);\n");
}
}
} else {
// Lighting doesn't affect color.
if (hasColor) {
WRITE(p, " v_color0 = color0;\n");
} else {
WRITE(p, " v_color0 = u_matambientalpha;\n");
}
if (lmode)
WRITE(p, " v_color1 = vec3(0.0);\n");
}
// Step 3: UV generation
if (doTexture) {
switch (gstate.getUVGenMode()) {
case GE_TEXMAP_TEXTURE_COORDS: // Scale-offset. Easy.
case GE_TEXMAP_UNKNOWN: // Not sure what this is, but Riviera uses it. Treating as coords works.
if (prescale && !flipV) {
WRITE(p, " v_texcoord = texcoord;\n");
} else {
WRITE(p, " v_texcoord = texcoord * u_uvscaleoffset.xy + u_uvscaleoffset.zw;\n");
}
break;
case GE_TEXMAP_TEXTURE_MATRIX: // Projection mapping.
{
std::string temp_tc;
switch (gstate.getUVProjMode()) {
case GE_PROJMAP_POSITION: // Use model space XYZ as source
temp_tc = "vec4(position.xyz, 1.0)";
break;
case GE_PROJMAP_UV: // Use unscaled UV as source
{
static const char *rescaleuv[4] = {"", " * 1.9921875", " * 1.999969482421875", ""}; // 2*127.5f/128.f, 2*32767.5f/32768.f, 1.0f};
const char *factor = rescaleuv[(vertType & GE_VTYPE_TC_MASK) >> GE_VTYPE_TC_SHIFT];
temp_tc = StringFromFormat("vec4(texcoord.xy %s, 0.0, 1.0)", factor);
}
break;
case GE_PROJMAP_NORMALIZED_NORMAL: // Use normalized transformed normal as source
if (hasNormal)
temp_tc = flipNormal ? "vec4(normalize(-normal), 1.0)" : "vec4(normalize(normal), 1.0)";
else
temp_tc = "vec4(0.0, 0.0, 1.0, 1.0)";
break;
case GE_PROJMAP_NORMAL: // Use non-normalized transformed normal as source
if (hasNormal)
temp_tc = flipNormal ? "vec4(-normal, 1.0)" : "vec4(normal, 1.0)";
else
temp_tc = "vec4(0.0, 0.0, 1.0, 1.0)";
break;
}
// Transform by texture matrix. XYZ as we are doing projection mapping.
WRITE(p, " v_texcoord = (u_texmtx * %s).xyz * vec3(u_uvscaleoffset.xy, 1.0);\n", temp_tc.c_str());
}
break;
case GE_TEXMAP_ENVIRONMENT_MAP: // Shade mapping - use dots from light sources.
WRITE(p, " v_texcoord = u_uvscaleoffset.xy * vec2(1.0 + dot(normalize(u_lightpos%i), worldnormal), 1.0 - dot(normalize(u_lightpos%i), worldnormal)) * 0.5;\n", gstate.getUVLS0(), gstate.getUVLS1());
break;
default:
// ILLEGAL
break;
}
if (flipV)
WRITE(p, " v_texcoord.y = 1.0 - v_texcoord.y;\n");
}
// Compute fogdepth
if (enableFog)
WRITE(p, " v_fogdepth = (viewPos.z + u_fogcoef.x) * u_fogcoef.y;\n");
}
WRITE(p, "}\n");
}
void TransformDrawEngine::SoftwareTransformAndDraw(
int prim, u8 *decoded, LinkedShader *program, int vertexCount, u32 vertType, void *inds, int indexType, const DecVtxFormat &decVtxFormat, int maxIndex) {
bool throughmode = (vertType & GE_VTYPE_THROUGH_MASK) != 0;
bool lmode = gstate.isUsingSecondaryColor() && gstate.isLightingEnabled();
// TODO: Split up into multiple draw calls for GLES 2.0 where you can't guarantee support for more than 0x10000 verts.
#if defined(MOBILE_DEVICE)
if (vertexCount > 0x10000/3)
vertexCount = 0x10000/3;
#endif
float uscale = 1.0f;
float vscale = 1.0f;
bool scaleUV = false;
if (throughmode) {
uscale /= gstate_c.curTextureWidth;
vscale /= gstate_c.curTextureHeight;
} else {
scaleUV = !g_Config.bPrescaleUV;
}
bool skinningEnabled = vertTypeIsSkinningEnabled(vertType);
int w = gstate.getTextureWidth(0);
int h = gstate.getTextureHeight(0);
float widthFactor = (float) w / (float) gstate_c.curTextureWidth;
float heightFactor = (float) h / (float) gstate_c.curTextureHeight;
Lighter lighter(vertType);
float fog_end = getFloat24(gstate.fog1);
float fog_slope = getFloat24(gstate.fog2);
VertexReader reader(decoded, decVtxFormat, vertType);
for (int index = 0; index < maxIndex; index++) {
reader.Goto(index);
float v[3] = {0, 0, 0};
float c0[4] = {1, 1, 1, 1};
float c1[4] = {0, 0, 0, 0};
float uv[3] = {0, 0, 1};
float fogCoef = 1.0f;
if (throughmode) {
// Do not touch the coordinates or the colors. No lighting.
reader.ReadPos(v);
if (reader.hasColor0()) {
reader.ReadColor0(c0);
for (int j = 0; j < 4; j++) {
c1[j] = 0.0f;
}
} else {
c0[0] = gstate.getMaterialAmbientR() / 255.f;
c0[1] = gstate.getMaterialAmbientG() / 255.f;
c0[2] = gstate.getMaterialAmbientB() / 255.f;
c0[3] = gstate.getMaterialAmbientA() / 255.f;
}
if (reader.hasUV()) {
reader.ReadUV(uv);
uv[0] *= uscale;
uv[1] *= vscale;
}
fogCoef = 1.0f;
// Scale UV?
} else {
// We do software T&L for now
float out[3], norm[3];
float pos[3], nrm[3];
Vec3f normal(0, 0, 1);
reader.ReadPos(pos);
if (reader.hasNormal())
reader.ReadNrm(nrm);
if (!skinningEnabled) {
Vec3ByMatrix43(out, pos, gstate.worldMatrix);
if (reader.hasNormal()) {
Norm3ByMatrix43(norm, nrm, gstate.worldMatrix);
normal = Vec3f(norm).Normalized();
}
} else {
float weights[8];
reader.ReadWeights(weights);
// Skinning
Vec3f psum(0,0,0);
Vec3f nsum(0,0,0);
for (int i = 0; i < vertTypeGetNumBoneWeights(vertType); i++) {
if (weights[i] != 0.0f) {
Vec3ByMatrix43(out, pos, gstate.boneMatrix+i*12);
Vec3f tpos(out);
psum += tpos * weights[i];
if (reader.hasNormal()) {
Norm3ByMatrix43(norm, nrm, gstate.boneMatrix+i*12);
Vec3f tnorm(norm);
nsum += tnorm * weights[i];
}
}
}
// Yes, we really must multiply by the world matrix too.
Vec3ByMatrix43(out, psum.AsArray(), gstate.worldMatrix);
if (reader.hasNormal()) {
Norm3ByMatrix43(norm, nsum.AsArray(), gstate.worldMatrix);
normal = Vec3f(norm).Normalized();
}
}
// Perform lighting here if enabled. don't need to check through, it's checked above.
float unlitColor[4] = {1, 1, 1, 1};
if (reader.hasColor0()) {
reader.ReadColor0(unlitColor);
} else {
unlitColor[0] = gstate.getMaterialAmbientR() / 255.f;
unlitColor[1] = gstate.getMaterialAmbientG() / 255.f;
unlitColor[2] = gstate.getMaterialAmbientB() / 255.f;
unlitColor[3] = gstate.getMaterialAmbientA() / 255.f;
}
float litColor0[4];
float litColor1[4];
lighter.Light(litColor0, litColor1, unlitColor, out, normal);
if (gstate.isLightingEnabled()) {
// Don't ignore gstate.lmode - we should send two colors in that case
for (int j = 0; j < 4; j++) {
c0[j] = litColor0[j];
}
if (lmode) {
// Separate colors
for (int j = 0; j < 4; j++) {
c1[j] = litColor1[j];
}
} else {
// Summed color into c0
for (int j = 0; j < 4; j++) {
c0[j] = ((c0[j] + litColor1[j]) > 1.0f) ? 1.0f : (c0[j] + litColor1[j]);
}
}
} else {
if (reader.hasColor0()) {
for (int j = 0; j < 4; j++) {
c0[j] = unlitColor[j];
}
} else {
c0[0] = gstate.getMaterialAmbientR() / 255.f;
c0[1] = gstate.getMaterialAmbientG() / 255.f;
c0[2] = gstate.getMaterialAmbientB() / 255.f;
c0[3] = gstate.getMaterialAmbientA() / 255.f;
}
if (lmode) {
for (int j = 0; j < 4; j++) {
c1[j] = 0.0f;
}
}
}
float ruv[2] = {0.0f, 0.0f};
if (reader.hasUV())
reader.ReadUV(ruv);
// Perform texture coordinate generation after the transform and lighting - one style of UV depends on lights.
switch (gstate.getUVGenMode()) {
case GE_TEXMAP_TEXTURE_COORDS: // UV mapping
case GE_TEXMAP_UNKNOWN: // Seen in Riviera. Unsure of meaning, but this works.
// Texture scale/offset is only performed in this mode.
if (scaleUV) {
uv[0] = ruv[0]*gstate_c.uv.uScale + gstate_c.uv.uOff;
uv[1] = ruv[1]*gstate_c.uv.vScale + gstate_c.uv.vOff;
} else {
uv[0] = ruv[0];
uv[1] = ruv[1];
}
uv[2] = 1.0f;
break;
case GE_TEXMAP_TEXTURE_MATRIX:
{
// Projection mapping
Vec3f source;
switch (gstate.getUVProjMode()) {
case GE_PROJMAP_POSITION: // Use model space XYZ as source
source = pos;
break;
case GE_PROJMAP_UV: // Use unscaled UV as source
source = Vec3f(ruv[0], ruv[1], 0.0f);
break;
case GE_PROJMAP_NORMALIZED_NORMAL: // Use normalized normal as source
if (reader.hasNormal()) {
source = Vec3f(norm).Normalized();
} else {
ERROR_LOG_REPORT(G3D, "Normal projection mapping without normal?");
source = Vec3f(0.0f, 0.0f, 1.0f);
}
break;
case GE_PROJMAP_NORMAL: // Use non-normalized normal as source!
if (reader.hasNormal()) {
source = Vec3f(norm);
} else {
ERROR_LOG_REPORT(G3D, "Normal projection mapping without normal?");
source = Vec3f(0.0f, 0.0f, 1.0f);
}
break;
}
float uvw[3];
Vec3ByMatrix43(uvw, &source.x, gstate.tgenMatrix);
uv[0] = uvw[0];
uv[1] = uvw[1];
uv[2] = uvw[2];
}
break;
case GE_TEXMAP_ENVIRONMENT_MAP:
// Shade mapping - use two light sources to generate U and V.
{
Vec3f lightpos0 = Vec3f(gstate_c.lightpos[gstate.getUVLS0()]).Normalized();
Vec3f lightpos1 = Vec3f(gstate_c.lightpos[gstate.getUVLS1()]).Normalized();
uv[0] = (1.0f + Dot(lightpos0, normal))/2.0f;
uv[1] = (1.0f - Dot(lightpos1, normal))/2.0f;
uv[2] = 1.0f;
}
break;
default:
// Illegal
ERROR_LOG_REPORT(G3D, "Impossible UV gen mode? %d", gstate.getUVGenMode());
break;
}
uv[0] = uv[0] * widthFactor;
uv[1] = uv[1] * heightFactor;
// Transform the coord by the view matrix.
Vec3ByMatrix43(v, out, gstate.viewMatrix);
fogCoef = (v[2] + fog_end) * fog_slope;
}
// TODO: Write to a flexible buffer, we don't always need all four components.
memcpy(&transformed[index].x, v, 3 * sizeof(float));
transformed[index].fog = fogCoef;
memcpy(&transformed[index].u, uv, 3 * sizeof(float));
if (gstate_c.flipTexture) {
transformed[index].v = 1.0f - transformed[index].v;
}
for (int i = 0; i < 4; i++) {
transformed[index].color0[i] = c0[i] * 255.0f;
}
for (int i = 0; i < 3; i++) {
transformed[index].color1[i] = c1[i] * 255.0f;
}
}
// Here's the best opportunity to try to detect rectangles used to clear the screen, and
// replace them with real OpenGL clears. This can provide a speedup on certain mobile chips.
// Disabled for now - depth does not come out exactly the same.
//
// An alternative option is to simply ditch all the verts except the first and last to create a single
// rectangle out of many. Quite a small optimization though.
if (false && maxIndex > 1 && gstate.isModeClear() && prim == GE_PRIM_RECTANGLES && IsReallyAClear(maxIndex)) {
u32 clearColor;
memcpy(&clearColor, transformed[0].color0, 4);
float clearDepth = transformed[0].z;
const float col[4] = {
((clearColor & 0xFF)) / 255.0f,
((clearColor & 0xFF00) >> 8) / 255.0f,
((clearColor & 0xFF0000) >> 16) / 255.0f,
((clearColor & 0xFF000000) >> 24) / 255.0f,
};
bool colorMask = gstate.isClearModeColorMask();
bool alphaMask = gstate.isClearModeAlphaMask();
glstate.colorMask.set(colorMask, colorMask, colorMask, alphaMask);
if (alphaMask) {
glstate.stencilTest.set(true);
// Clear stencil
// TODO: extract the stencilValue properly, see below
int stencilValue = 0;
glstate.stencilFunc.set(GL_ALWAYS, stencilValue, 255);
} else {
// Don't touch stencil
glstate.stencilTest.set(false);
}
glstate.scissorTest.set(false);
bool depthMask = gstate.isClearModeDepthMask();
int target = 0;
if (colorMask || alphaMask) target |= GL_COLOR_BUFFER_BIT | GL_STENCIL_BUFFER_BIT;
if (depthMask) target |= GL_DEPTH_BUFFER_BIT;
glClearColor(col[0], col[1], col[2], col[3]);
#ifdef USING_GLES2
glClearDepthf(clearDepth);
#else
glClearDepth(clearDepth);
#endif
glClearStencil(0); // TODO - take from alpha?
glClear(target);
return;
}
VertexData TransformUnit::ReadVertex(VertexReader& vreader)
{
VertexData vertex;
float pos[3];
// VertexDecoder normally scales z, but we want it unscaled.
vreader.ReadPosThroughZ16(pos);
if (!gstate.isModeClear() && gstate.isTextureMapEnabled() && vreader.hasUV()) {
float uv[2];
vreader.ReadUV(uv);
vertex.texturecoords = Vec2<float>(uv[0], uv[1]);
}
if (vreader.hasNormal()) {
float normal[3];
vreader.ReadNrm(normal);
vertex.normal = Vec3<float>(normal[0], normal[1], normal[2]);
if (gstate.areNormalsReversed())
vertex.normal = -vertex.normal;
}
if (vertTypeIsSkinningEnabled(gstate.vertType) && !gstate.isModeThrough()) {
float W[8] = { 1.f, 0.f, 0.f, 0.f, 0.f, 0.f, 0.f, 0.f };
vreader.ReadWeights(W);
Vec3<float> tmppos(0.f, 0.f, 0.f);
Vec3<float> tmpnrm(0.f, 0.f, 0.f);
for (int i = 0; i < vertTypeGetNumBoneWeights(gstate.vertType); ++i) {
Mat3x3<float> bone(&gstate.boneMatrix[12*i]);
tmppos += (bone * ModelCoords(pos[0], pos[1], pos[2]) + Vec3<float>(gstate.boneMatrix[12*i+9], gstate.boneMatrix[12*i+10], gstate.boneMatrix[12*i+11])) * W[i];
if (vreader.hasNormal())
tmpnrm += (bone * vertex.normal) * W[i];
}
pos[0] = tmppos.x;
pos[1] = tmppos.y;
pos[2] = tmppos.z;
if (vreader.hasNormal())
vertex.normal = tmpnrm;
}
if (vreader.hasColor0()) {
float col[4];
vreader.ReadColor0(col);
vertex.color0 = Vec4<int>(col[0]*255, col[1]*255, col[2]*255, col[3]*255);
} else {
vertex.color0 = Vec4<int>(gstate.getMaterialAmbientR(), gstate.getMaterialAmbientG(), gstate.getMaterialAmbientB(), gstate.getMaterialAmbientA());
}
if (vreader.hasColor1()) {
float col[3];
vreader.ReadColor1(col);
vertex.color1 = Vec3<int>(col[0]*255, col[1]*255, col[2]*255);
} else {
vertex.color1 = Vec3<int>(0, 0, 0);
}
if (!gstate.isModeThrough()) {
vertex.modelpos = ModelCoords(pos[0], pos[1], pos[2]);
vertex.worldpos = WorldCoords(TransformUnit::ModelToWorld(vertex.modelpos));
ModelCoords viewpos = TransformUnit::WorldToView(vertex.worldpos);
vertex.clippos = ClipCoords(TransformUnit::ViewToClip(viewpos));
if (gstate.isFogEnabled()) {
float fog_end = getFloat24(gstate.fog1);
float fog_slope = getFloat24(gstate.fog2);
// Same fixup as in ShaderManagerGLES.cpp
if (my_isnanorinf(fog_end)) {
// Not really sure what a sensible value might be, but let's try 64k.
fog_end = std::signbit(fog_end) ? -65535.0f : 65535.0f;
}
if (my_isnanorinf(fog_slope)) {
fog_slope = std::signbit(fog_slope) ? -65535.0f : 65535.0f;
}
vertex.fogdepth = (viewpos.z + fog_end) * fog_slope;
} else {
vertex.fogdepth = 1.0f;
}
vertex.screenpos = ClipToScreenInternal(vertex.clippos, &outside_range_flag);
if (vreader.hasNormal()) {
vertex.worldnormal = TransformUnit::ModelToWorldNormal(vertex.normal);
// TODO: Isn't there a flag that controls whether to normalize the normal?
vertex.worldnormal /= vertex.worldnormal.Length();
} else {
vertex.worldnormal = Vec3<float>(0.0f, 0.0f, 1.0f);
}
Lighting::Process(vertex, vreader.hasColor0());
} else {
vertex.screenpos.x = (int)(pos[0] * 16) + gstate.getOffsetX16();
vertex.screenpos.y = (int)(pos[1] * 16) + gstate.getOffsetY16();
vertex.screenpos.z = pos[2];
vertex.clippos.w = 1.f;
vertex.fogdepth = 1.f;
}
return vertex;
}
static VertexData ReadVertex(VertexReader& vreader)
{
VertexData vertex;
float pos[3];
// VertexDecoder normally scales z, but we want it unscaled.
vreader.ReadPosZ16(pos);
if (!gstate.isModeClear() && gstate.isTextureMapEnabled() && vreader.hasUV()) {
float uv[2];
vreader.ReadUV(uv);
vertex.texturecoords = Vec2<float>(uv[0], uv[1]);
}
if (vreader.hasNormal()) {
float normal[3];
vreader.ReadNrm(normal);
vertex.normal = Vec3<float>(normal[0], normal[1], normal[2]);
if (gstate.areNormalsReversed())
vertex.normal = -vertex.normal;
}
if (vertTypeIsSkinningEnabled(gstate.vertType) && !gstate.isModeThrough()) {
float W[8] = { 1.f, 0.f, 0.f, 0.f, 0.f, 0.f, 0.f, 0.f };
vreader.ReadWeights(W);
Vec3<float> tmppos(0.f, 0.f, 0.f);
Vec3<float> tmpnrm(0.f, 0.f, 0.f);
for (int i = 0; i < vertTypeGetNumBoneWeights(gstate.vertType); ++i) {
Mat3x3<float> bone(&gstate.boneMatrix[12*i]);
tmppos += (bone * ModelCoords(pos[0], pos[1], pos[2]) * W[i] + Vec3<float>(gstate.boneMatrix[12*i+9], gstate.boneMatrix[12*i+10], gstate.boneMatrix[12*i+11]));
if (vreader.hasNormal())
tmpnrm += (bone * vertex.normal) * W[i];
}
pos[0] = tmppos.x;
pos[1] = tmppos.y;
pos[2] = tmppos.z;
if (vreader.hasNormal())
vertex.normal = tmpnrm;
}
if (vreader.hasColor0()) {
float col[4];
vreader.ReadColor0(col);
vertex.color0 = Vec4<int>(col[0]*255, col[1]*255, col[2]*255, col[3]*255);
} else {
vertex.color0 = Vec4<int>(gstate.getMaterialAmbientR(), gstate.getMaterialAmbientG(), gstate.getMaterialAmbientB(), gstate.getMaterialAmbientA());
}
if (vreader.hasColor1()) {
float col[3];
vreader.ReadColor1(col);
vertex.color1 = Vec3<int>(col[0]*255, col[1]*255, col[2]*255);
} else {
vertex.color1 = Vec3<int>(0, 0, 0);
}
if (!gstate.isModeThrough()) {
vertex.modelpos = ModelCoords(pos[0], pos[1], pos[2]);
vertex.worldpos = WorldCoords(TransformUnit::ModelToWorld(vertex.modelpos));
vertex.clippos = ClipCoords(TransformUnit::ViewToClip(TransformUnit::WorldToView(vertex.worldpos)));
vertex.screenpos = ClipToScreenInternal(vertex.clippos);
if (vreader.hasNormal()) {
vertex.worldnormal = TransformUnit::ModelToWorldNormal(vertex.normal);
// TODO: Isn't there a flag that controls whether to normalize the normal?
vertex.worldnormal /= vertex.worldnormal.Length();
}
Lighting::Process(vertex);
} else {
vertex.screenpos.x = (u32)pos[0] * 16 + gstate.getOffsetX16();
vertex.screenpos.y = (u32)pos[1] * 16 + gstate.getOffsetY16();
vertex.screenpos.z = pos[2];
vertex.clippos.w = 1.f;
}
return vertex;
}
void SoftwareTransform(
int prim, int vertexCount, u32 vertType, u16 *&inds, int indexType,
const DecVtxFormat &decVtxFormat, int &maxIndex, TransformedVertex *&drawBuffer, int &numTrans, bool &drawIndexed, const SoftwareTransformParams *params, SoftwareTransformResult *result) {
u8 *decoded = params->decoded;
FramebufferManagerCommon *fbman = params->fbman;
TextureCacheCommon *texCache = params->texCache;
TransformedVertex *transformed = params->transformed;
TransformedVertex *transformedExpanded = params->transformedExpanded;
float ySign = 1.0f;
bool throughmode = (vertType & GE_VTYPE_THROUGH_MASK) != 0;
bool lmode = gstate.isUsingSecondaryColor() && gstate.isLightingEnabled();
// TODO: Split up into multiple draw calls for GLES 2.0 where you can't guarantee support for more than 0x10000 verts.
#if defined(MOBILE_DEVICE)
if (vertexCount > 0x10000/3)
vertexCount = 0x10000/3;
#endif
float uscale = 1.0f;
float vscale = 1.0f;
if (throughmode) {
uscale /= gstate_c.curTextureWidth;
vscale /= gstate_c.curTextureHeight;
}
bool skinningEnabled = vertTypeIsSkinningEnabled(vertType);
const int w = gstate.getTextureWidth(0);
const int h = gstate.getTextureHeight(0);
float widthFactor = (float) w / (float) gstate_c.curTextureWidth;
float heightFactor = (float) h / (float) gstate_c.curTextureHeight;
Lighter lighter(vertType);
float fog_end = getFloat24(gstate.fog1);
float fog_slope = getFloat24(gstate.fog2);
// Same fixup as in ShaderManager.cpp
if (my_isinf(fog_slope)) {
// not really sure what a sensible value might be.
fog_slope = fog_slope < 0.0f ? -10000.0f : 10000.0f;
}
if (my_isnan(fog_slope)) {
// Workaround for https://github.com/hrydgard/ppsspp/issues/5384#issuecomment-38365988
// Just put the fog far away at a large finite distance.
// Infinities and NaNs are rather unpredictable in shaders on many GPUs
// so it's best to just make it a sane calculation.
fog_end = 100000.0f;
fog_slope = 1.0f;
}
VertexReader reader(decoded, decVtxFormat, vertType);
if (throughmode) {
for (int index = 0; index < maxIndex; index++) {
// Do not touch the coordinates or the colors. No lighting.
reader.Goto(index);
// TODO: Write to a flexible buffer, we don't always need all four components.
TransformedVertex &vert = transformed[index];
reader.ReadPos(vert.pos);
if (reader.hasColor0()) {
reader.ReadColor0_8888(vert.color0);
} else {
vert.color0_32 = gstate.getMaterialAmbientRGBA();
}
if (reader.hasUV()) {
reader.ReadUV(vert.uv);
vert.u *= uscale;
vert.v *= vscale;
} else {
vert.u = 0.0f;
vert.v = 0.0f;
}
// Ignore color1 and fog, never used in throughmode anyway.
// The w of uv is also never used (hardcoded to 1.0.)
}
} else {
// Okay, need to actually perform the full transform.
for (int index = 0; index < maxIndex; index++) {
reader.Goto(index);
float v[3] = {0, 0, 0};
Vec4f c0 = Vec4f(1, 1, 1, 1);
Vec4f c1 = Vec4f(0, 0, 0, 0);
float uv[3] = {0, 0, 1};
float fogCoef = 1.0f;
// We do software T&L for now
float out[3];
float pos[3];
Vec3f normal(0, 0, 1);
Vec3f worldnormal(0, 0, 1);
reader.ReadPos(pos);
if (!skinningEnabled) {
Vec3ByMatrix43(out, pos, gstate.worldMatrix);
if (reader.hasNormal()) {
reader.ReadNrm(normal.AsArray());
if (gstate.areNormalsReversed()) {
normal = -normal;
}
Norm3ByMatrix43(worldnormal.AsArray(), normal.AsArray(), gstate.worldMatrix);
worldnormal = worldnormal.Normalized();
}
} else {
float weights[8];
reader.ReadWeights(weights);
if (reader.hasNormal())
reader.ReadNrm(normal.AsArray());
// Skinning
Vec3f psum(0, 0, 0);
Vec3f nsum(0, 0, 0);
for (int i = 0; i < vertTypeGetNumBoneWeights(vertType); i++) {
if (weights[i] != 0.0f) {
Vec3ByMatrix43(out, pos, gstate.boneMatrix+i*12);
Vec3f tpos(out);
psum += tpos * weights[i];
if (reader.hasNormal()) {
Vec3f norm;
Norm3ByMatrix43(norm.AsArray(), normal.AsArray(), gstate.boneMatrix+i*12);
nsum += norm * weights[i];
}
}
}
// Yes, we really must multiply by the world matrix too.
Vec3ByMatrix43(out, psum.AsArray(), gstate.worldMatrix);
if (reader.hasNormal()) {
normal = nsum;
if (gstate.areNormalsReversed()) {
normal = -normal;
}
Norm3ByMatrix43(worldnormal.AsArray(), normal.AsArray(), gstate.worldMatrix);
worldnormal = worldnormal.Normalized();
}
}
// Perform lighting here if enabled. don't need to check through, it's checked above.
Vec4f unlitColor = Vec4f(1, 1, 1, 1);
if (reader.hasColor0()) {
reader.ReadColor0(&unlitColor.x);
} else {
unlitColor = Vec4f::FromRGBA(gstate.getMaterialAmbientRGBA());
}
if (gstate.isLightingEnabled()) {
float litColor0[4];
float litColor1[4];
lighter.Light(litColor0, litColor1, unlitColor.AsArray(), out, worldnormal);
// Don't ignore gstate.lmode - we should send two colors in that case
for (int j = 0; j < 4; j++) {
c0[j] = litColor0[j];
}
if (lmode) {
// Separate colors
for (int j = 0; j < 4; j++) {
c1[j] = litColor1[j];
}
} else {
// Summed color into c0 (will clamp in ToRGBA().)
for (int j = 0; j < 4; j++) {
c0[j] += litColor1[j];
}
}
} else {
if (reader.hasColor0()) {
for (int j = 0; j < 4; j++) {
c0[j] = unlitColor[j];
}
} else {
c0 = Vec4f::FromRGBA(gstate.getMaterialAmbientRGBA());
}
if (lmode) {
// c1 is already 0.
}
}
float ruv[2] = {0.0f, 0.0f};
if (reader.hasUV())
reader.ReadUV(ruv);
// Perform texture coordinate generation after the transform and lighting - one style of UV depends on lights.
switch (gstate.getUVGenMode()) {
case GE_TEXMAP_TEXTURE_COORDS: // UV mapping
case GE_TEXMAP_UNKNOWN: // Seen in Riviera. Unsure of meaning, but this works.
// We always prescale in the vertex decoder now.
uv[0] = ruv[0];
uv[1] = ruv[1];
uv[2] = 1.0f;
break;
case GE_TEXMAP_TEXTURE_MATRIX:
{
// Projection mapping
Vec3f source;
switch (gstate.getUVProjMode()) {
case GE_PROJMAP_POSITION: // Use model space XYZ as source
source = pos;
break;
case GE_PROJMAP_UV: // Use unscaled UV as source
source = Vec3f(ruv[0], ruv[1], 0.0f);
break;
case GE_PROJMAP_NORMALIZED_NORMAL: // Use normalized normal as source
source = normal.Normalized();
if (!reader.hasNormal()) {
ERROR_LOG_REPORT(G3D, "Normal projection mapping without normal?");
}
break;
case GE_PROJMAP_NORMAL: // Use non-normalized normal as source!
source = normal;
if (!reader.hasNormal()) {
ERROR_LOG_REPORT(G3D, "Normal projection mapping without normal?");
}
break;
}
float uvw[3];
Vec3ByMatrix43(uvw, &source.x, gstate.tgenMatrix);
uv[0] = uvw[0];
uv[1] = uvw[1];
uv[2] = uvw[2];
}
break;
case GE_TEXMAP_ENVIRONMENT_MAP:
// Shade mapping - use two light sources to generate U and V.
{
Vec3f lightpos0 = Vec3f(&lighter.lpos[gstate.getUVLS0() * 3]).Normalized();
Vec3f lightpos1 = Vec3f(&lighter.lpos[gstate.getUVLS1() * 3]).Normalized();
uv[0] = (1.0f + Dot(lightpos0, worldnormal))/2.0f;
uv[1] = (1.0f + Dot(lightpos1, worldnormal))/2.0f;
uv[2] = 1.0f;
}
break;
default:
// Illegal
ERROR_LOG_REPORT(G3D, "Impossible UV gen mode? %d", gstate.getUVGenMode());
break;
}
uv[0] = uv[0] * widthFactor;
uv[1] = uv[1] * heightFactor;
// Transform the coord by the view matrix.
Vec3ByMatrix43(v, out, gstate.viewMatrix);
fogCoef = (v[2] + fog_end) * fog_slope;
// TODO: Write to a flexible buffer, we don't always need all four components.
memcpy(&transformed[index].x, v, 3 * sizeof(float));
transformed[index].fog = fogCoef;
memcpy(&transformed[index].u, uv, 3 * sizeof(float));
transformed[index].color0_32 = c0.ToRGBA();
transformed[index].color1_32 = c1.ToRGBA();
// The multiplication by the projection matrix is still performed in the vertex shader.
// So is vertex depth rounding, to simulate the 16-bit depth buffer.
}
}
// Here's the best opportunity to try to detect rectangles used to clear the screen, and
// replace them with real clears. This can provide a speedup on certain mobile chips.
//
// An alternative option is to simply ditch all the verts except the first and last to create a single
// rectangle out of many. Quite a small optimization though.
// Experiment: Disable on PowerVR (see issue #6290)
// TODO: This bleeds outside the play area in non-buffered mode. Big deal? Probably not.
bool reallyAClear = false;
if (maxIndex > 1 && prim == GE_PRIM_RECTANGLES && gstate.isModeClear()) {
int scissorX2 = gstate.getScissorX2() + 1;
int scissorY2 = gstate.getScissorY2() + 1;
reallyAClear = IsReallyAClear(transformed, maxIndex, scissorX2, scissorY2);
}
if (reallyAClear && gl_extensions.gpuVendor != GPU_VENDOR_POWERVR) { // && g_Config.iRenderingMode != FB_NON_BUFFERED_MODE) {
// If alpha is not allowed to be separate, it must match for both depth/stencil and color. Vulkan requires this.
bool alphaMatchesColor = gstate.isClearModeColorMask() == gstate.isClearModeAlphaMask();
bool depthMatchesStencil = gstate.isClearModeAlphaMask() == gstate.isClearModeDepthMask();
if (params->allowSeparateAlphaClear || (alphaMatchesColor && depthMatchesStencil)) {
result->color = transformed[1].color0_32;
// Need to rescale from a [0, 1] float. This is the final transformed value.
result->depth = ToScaledDepth((s16)(int)(transformed[1].z * 65535.0f));
result->action = SW_CLEAR;
return;
}
}
// This means we're using a framebuffer (and one that isn't big enough.)
if (gstate_c.curTextureHeight < (u32)h && maxIndex >= 2) {
// Even if not rectangles, this will detect if either of the first two are outside the framebuffer.
// HACK: Adding one pixel margin to this detection fixes issues in Assassin's Creed : Bloodlines,
// while still keeping BOF working (see below).
const float invTexH = 1.0f / gstate_c.curTextureHeight; // size of one texel.
bool tlOutside;
bool tlAlmostOutside;
bool brOutside;
// If we're outside heightFactor, then v must be wrapping or clamping. Avoid this workaround.
// If we're <= 1.0f, we're inside the framebuffer (workaround not needed.)
// We buffer that 1.0f a little more with a texel to avoid some false positives.
tlOutside = transformed[0].v <= heightFactor && transformed[0].v > 1.0f + invTexH;
brOutside = transformed[1].v <= heightFactor && transformed[1].v > 1.0f + invTexH;
// Careful: if br is outside, but tl is well inside, this workaround still doesn't make sense.
// We go with halfway, since we overestimate framebuffer heights sometimes but not by much.
tlAlmostOutside = transformed[0].v <= heightFactor && transformed[0].v >= 0.5f;
if (tlOutside || (brOutside && tlAlmostOutside)) {
// Okay, so we're texturing from outside the framebuffer, but inside the texture height.
// Breath of Fire 3 does this to access a render surface at an offset.
const u32 bpp = fbman->GetTargetFormat() == GE_FORMAT_8888 ? 4 : 2;
const u32 prevH = texCache->AttachedDrawingHeight();
const u32 fb_size = bpp * fbman->GetTargetStride() * prevH;
const u32 prevYOffset = gstate_c.curTextureYOffset;
if (texCache->SetOffsetTexture(fb_size)) {
const float oldWidthFactor = widthFactor;
const float oldHeightFactor = heightFactor;
widthFactor = (float) w / (float) gstate_c.curTextureWidth;
heightFactor = (float) h / (float) gstate_c.curTextureHeight;
// We've already baked in the old gstate_c.curTextureYOffset, so correct.
const float yDiff = (float) (prevH + prevYOffset - gstate_c.curTextureYOffset) / (float) h;
for (int index = 0; index < maxIndex; ++index) {
transformed[index].u *= widthFactor / oldWidthFactor;
// Inverse it back to scale to the new FBO, and add 1.0f to account for old FBO.
transformed[index].v = (transformed[index].v / oldHeightFactor - yDiff) * heightFactor;
}
}
}
}
// Step 2: expand rectangles.
drawBuffer = transformed;
numTrans = 0;
drawIndexed = false;
if (prim != GE_PRIM_RECTANGLES) {
// We can simply draw the unexpanded buffer.
numTrans = vertexCount;
drawIndexed = true;
} else {
bool useBufferedRendering = g_Config.iRenderingMode != FB_NON_BUFFERED_MODE;
if (useBufferedRendering)
ySign = -ySign;
float flippedMatrix[16];
if (!throughmode) {
memcpy(&flippedMatrix, gstate.projMatrix, 16 * sizeof(float));
const bool invertedY = useBufferedRendering ? (gstate_c.vpHeight < 0) : (gstate_c.vpHeight > 0);
if (invertedY) {
flippedMatrix[1] = -flippedMatrix[1];
flippedMatrix[5] = -flippedMatrix[5];
flippedMatrix[9] = -flippedMatrix[9];
flippedMatrix[13] = -flippedMatrix[13];
}
const bool invertedX = gstate_c.vpWidth < 0;
if (invertedX) {
flippedMatrix[0] = -flippedMatrix[0];
flippedMatrix[4] = -flippedMatrix[4];
flippedMatrix[8] = -flippedMatrix[8];
flippedMatrix[12] = -flippedMatrix[12];
}
}
//rectangles always need 2 vertices, disregard the last one if there's an odd number
vertexCount = vertexCount & ~1;
numTrans = 0;
drawBuffer = transformedExpanded;
TransformedVertex *trans = &transformedExpanded[0];
const u16 *indsIn = (const u16 *)inds;
u16 *newInds = inds + vertexCount;
u16 *indsOut = newInds;
maxIndex = 4 * vertexCount;
for (int i = 0; i < vertexCount; i += 2) {
const TransformedVertex &transVtxTL = transformed[indsIn[i + 0]];
const TransformedVertex &transVtxBR = transformed[indsIn[i + 1]];
// We have to turn the rectangle into two triangles, so 6 points.
// This is 4 verts + 6 indices.
// bottom right
trans[0] = transVtxBR;
// top right
trans[1] = transVtxBR;
trans[1].y = transVtxTL.y;
trans[1].v = transVtxTL.v;
// top left
trans[2] = transVtxBR;
trans[2].x = transVtxTL.x;
trans[2].y = transVtxTL.y;
trans[2].u = transVtxTL.u;
trans[2].v = transVtxTL.v;
// bottom left
trans[3] = transVtxBR;
trans[3].x = transVtxTL.x;
trans[3].u = transVtxTL.u;
// That's the four corners. Now process UV rotation.
if (throughmode)
RotateUVThrough(trans);
else
RotateUV(trans, flippedMatrix, ySign);
// Triangle: BR-TR-TL
indsOut[0] = i * 2 + 0;
indsOut[1] = i * 2 + 1;
indsOut[2] = i * 2 + 2;
// Triangle: BL-BR-TL
indsOut[3] = i * 2 + 3;
indsOut[4] = i * 2 + 0;
indsOut[5] = i * 2 + 2;
trans += 4;
indsOut += 6;
numTrans += 6;
}
inds = newInds;
drawIndexed = true;
// We don't know the color until here, so we have to do it now, instead of in StateMapping.
// Might want to reconsider the order of things later...
if (gstate.isModeClear() && gstate.isClearModeAlphaMask()) {
result->setStencil = true;
if (vertexCount > 1) {
// Take the bottom right alpha value of the first rect as the stencil value.
// Technically, each rect could individually fill its stencil, but most of the
// time they use the same one.
result->stencilValue = transformed[indsIn[1]].color0[3];
} else {
result->stencilValue = 0;
}
}
}
result->action = SW_DRAW_PRIMITIVES;
}
