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Support aligned 4-bit accesses to 32-bit framebuffers

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Henrik Rydgard
2014-05-27 22:09:24 +02:00
parent ee150fadbb
commit 00c24ad3fc
1 changed files with 12 additions and 13 deletions
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GPU/GLES/DepalettizeShader.cpp
+12 -13
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@@ -83,14 +83,6 @@ void GenerateDepalShader(char *buffer, GEBufferFormat pixelFormat) {
char *p = buffer;
#define WRITE p+=sprintf
WRITE(p, "#version 100\n");
WRITE(p, "precision mediump float;\n");
WRITE(p, "varying vec2 v_texcoord0;\n");
WRITE(p, "uniform sampler2D tex;\n");
WRITE(p, "uniform sampler2D pal;\n");
WRITE(p, "void main() {\n");
WRITE(p, " vec4 index = texture2D(tex, v_texcoord0);\n");
char lookupMethod[128] = "index.r";
char offset[128] = "";
@@ -104,13 +96,16 @@ void GenerateDepalShader(char *buffer, GEBufferFormat pixelFormat) {
// pixelformat is the format of the texture we are sampling.
switch (pixelFormat) {
case GE_FORMAT_8888:
if (mask == 0xFF) {
if ((mask & 0xF) == 0xF) {
switch (shift) { // bgra?
case 0: strcpy(lookupMethod, "index.r"); break;
case 4: strcpy(lookupMethod, "index.r"); multiplier = (1.0f / 16.0f); break;
case 8: strcpy(lookupMethod, "index.g"); break;
case 12: strcpy(lookupMethod, "index.g"); multiplier = (1.0f / 16.0f); break;
case 16: strcpy(lookupMethod, "index.b"); break;
default:
case 20: strcpy(lookupMethod, "index.b"); multiplier = (1.0f / 16.0f); break;
case 24: strcpy(lookupMethod, "index.a"); break;
case 28: strcpy(lookupMethod, "index.a"); multiplier = (1.0f / 16.0f); break;
}
} else {
// Ugh
@@ -122,7 +117,6 @@ void GenerateDepalShader(char *buffer, GEBufferFormat pixelFormat) {
case 0: strcpy(lookupMethod, "index.r"); break;
case 4: strcpy(lookupMethod, "index.g"); break;
case 8: strcpy(lookupMethod, "index.b"); break;
default:
case 12: strcpy(lookupMethod, "index.a"); break;
}
multiplier = (1.0f / 16.0f) * 255.0f / 256.0f; // Need the fudge factor to not "wrap"...
@@ -135,7 +129,6 @@ void GenerateDepalShader(char *buffer, GEBufferFormat pixelFormat) {
switch (shift) { // bgra?
case 0: strcpy(lookupMethod, "index.r"); multiplier = 1.0f / 32.0f; break;
case 5: strcpy(lookupMethod, "index.g"); multiplier = 1.0f / 64.0f; break;
default:
case 11: strcpy(lookupMethod, "index.b"); multiplier = 1.0f / 32.0f; break;
}
} else {
@@ -148,7 +141,6 @@ void GenerateDepalShader(char *buffer, GEBufferFormat pixelFormat) {
case 0: strcpy(lookupMethod, "index.r"); multiplier = 1.0f / 32.0f; break;
case 4: strcpy(lookupMethod, "index.g"); multiplier = 1.0f / 32.0f; break;
case 8: strcpy(lookupMethod, "index.b"); multiplier = 1.0f / 32.0f; break;
default:
case 15: strcpy(lookupMethod, "index.a"); multiplier = 1.0f / 128.0f; break;
}
} else {
@@ -161,6 +153,13 @@ void GenerateDepalShader(char *buffer, GEBufferFormat pixelFormat) {
sprintf(offset, " + %.0f", (float)clutBase / 255.0f); // 256?
}
WRITE(p, "#version 100\n");
WRITE(p, "precision mediump float;\n");
WRITE(p, "varying vec2 v_texcoord0;\n");
WRITE(p, "uniform sampler2D tex;\n");
WRITE(p, "uniform sampler2D pal;\n");
WRITE(p, "void main() {\n");
WRITE(p, " vec4 index = texture2D(tex, v_texcoord0);\n");
WRITE(p, " gl_FragColor = texture2D(pal, vec2((%s * %f)%s, 0.0));\n", lookupMethod, multiplier, offset);
WRITE(p, "}\n");
}