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Continue implementing GLSL mode 0, now with layers and offsets

This commit is contained in:
Jeffrey Pfau 2013-05-07 04:11:49 -07:00
parent cc2262149e
commit 03fb87acd0
1 changed files with 86 additions and 23 deletions
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109
src/gba/renderers/video-glsl.c
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@ -11,29 +11,80 @@ static const GLfloat _vertices[4] = {
1, 0
};
static const GLchar* _fragmentShader[] = {
"#extension GL_EXT_gpu_shader4 : enable\n",
"varying float x;\n",
"uniform float y;\n",
"uniform sampler2D vram;\n",
"uniform int bg3cnt;\n",
"#define VRAM_INDEX(i) (vec2(mod(float(i), 512.0) / 511.0, (160.0 + floor(float(i) / 512.0)) / 255.0))\n",
"#define DESERIALIZE(vec) int(dot(vec4(63488.0, 1984.0, 62.0, 1.0), vec))\n",
"void main() {\n",
" int charBase = ((bg3cnt / 4) & 3) * 8192;\n",
" int screenBase = ((bg3cnt / 256) & 0x1F) * 1024;\n",
" int xBase = int(x) & 0xF8;\n",
" int yBase = int(y) & 0xF8;\n",
" screenBase = screenBase + (xBase / 8) + (yBase * 4);\n",
" int mapData = DESERIALIZE(texture2D(vram, VRAM_INDEX(screenBase)));\n",
" charBase = charBase + ((mapData & 0x3FF) * 16) + (int(x) & 0x4) / 4 + (int(y) & 0x7) * 2;\n",
" int tileData = DESERIALIZE(texture2D(vram, VRAM_INDEX(charBase)));\n",
" tileData = ((tileData >> ((int(x) & 3) * 4)) & 0xF) + (mapData / 4096) * 16;\n",
" gl_FragColor = texture2D(vram, vec2(float(tileData) / 512.0, y / 256.0));\n",
static const GLchar* _fragmentShader =
"#extension GL_EXT_gpu_shader4 : enable\n"
"varying float x;\n"
"uniform float y;\n"
"uniform sampler2D vram;\n"
"uniform int dispcnt;\n"
"uniform int bg0cnt;\n"
"uniform int bg1cnt;\n"
"uniform int bg2cnt;\n"
"uniform int bg3cnt;\n"
"uniform int bg0hofs;\n"
"uniform int bg0vofs;\n"
"uniform int bg1hofs;\n"
"uniform int bg1vofs;\n"
"uniform int bg2hofs;\n"
"uniform int bg2vofs;\n"
"uniform int bg3hofs;\n"
"uniform int bg3vofs;\n"
"#define VRAM_INDEX(i) (vec2(mod(float(i), 512.0) / 511.0, (160.0 + floor(float(i) / 512.0)) / 255.0))\n"
"#define DESERIALIZE(vec) int(dot(vec4(63488.0, 1984.0, 62.0, 1.0), vec))\n"
"vec4 backgroundMode0(int bgcnt, int hofs, int vofs) {\n"
" int charBase = ((bgcnt / 4) & 3) * 8192;\n"
" int screenBase = ((bgcnt / 256) & 0x1F) * 1024;\n"
" int localX = hofs + int(x);\n"
" int localY = vofs + int(y);\n"
" int xBase = localX & 0xF8;\n"
" int yBase = localY & 0xF8;\n"
" screenBase = screenBase + (xBase / 8) + (yBase * 4);\n"
" int mapData = DESERIALIZE(texture2D(vram, VRAM_INDEX(screenBase)));\n"
" charBase = charBase + ((mapData & 0x3FF) * 16) + (localX & 0x4) / 4 + (localY & 0x7) * 2;\n"
" int tileData = DESERIALIZE(texture2D(vram, VRAM_INDEX(charBase)));\n"
" tileData = ((tileData >> ((localX & 3) * 4)) & 0xF);\n"
" if (tileData == 0) {\n"
" return vec4(0, 0, 0, 0);\n"
" }\n"
" return texture2D(vram, vec2(float(tileData + (mapData / 4096) * 16) / 512.0, y / 256.0));\n"
"}\n"
};
"void runPriority(int priority, inout vec4 color) {\n"
" if (color.a > 0.0) {\n"
" return;\n"
" }\n"
" if ((dispcnt & 0x100) != 0 && (bg0cnt & 0x3) == priority) {\n"
" color = backgroundMode0(bg0cnt, bg0hofs, bg0vofs);\n"
" }\n"
" if (color.a > 0.0) {\n"
" return;\n"
" }\n"
" if ((dispcnt & 0x200) != 0 && (bg1cnt & 0x3) == priority) {\n"
" color = backgroundMode0(bg1cnt, bg1hofs, bg1vofs);\n"
" }\n"
" if (color.a > 0.0) {\n"
" return;\n"
" }\n"
" if ((dispcnt & 0x400) != 0 && (bg2cnt & 0x3) == priority) {\n"
" color = backgroundMode0(bg2cnt, bg2hofs, bg2vofs);\n"
" }\n"
" if (color.a > 0.0) {\n"
" return;\n"
" }\n"
" if ((dispcnt & 0x800) != 0 && (bg3cnt & 0x3) == priority) {\n"
" color = backgroundMode0(bg3cnt, bg3hofs, bg3vofs);\n"
" }\n"
"}\n"
"void main() {\n"
" vec4 color = vec4(0.0, 0.0, 0.0, 0.0);\n"
" runPriority(0, color);\n"
" runPriority(1, color);\n"
" runPriority(2, color);\n"
" runPriority(3, color);\n"
" gl_FragColor = color;\n"
"}\n";
static const GLchar* _vertexShader[] = {
"varying float x;",
@ -69,7 +120,7 @@ void GBAVideoGLSLRendererCreate(struct GBAVideoGLSLRenderer* glslRenderer) {
glslRenderer->vertexShader = glCreateShader(GL_VERTEX_SHADER);
glslRenderer->program = glCreateProgram();
glShaderSource(glslRenderer->fragmentShader, 19, _fragmentShader, 0);
glShaderSource(glslRenderer->fragmentShader, 1, (const GLchar**) &_fragmentShader, 0);
glShaderSource(glslRenderer->vertexShader, 7, _vertexShader, 0);
glAttachShader(glslRenderer->program, glslRenderer->vertexShader);
@ -102,7 +153,19 @@ void GBAVideoGLSLRendererCreate(struct GBAVideoGLSLRenderer* glslRenderer) {
void GBAVideoGLSLRendererProcessEvents(struct GBAVideoGLSLRenderer* glslRenderer) {
glUseProgram(glslRenderer->program);
glUniform1i(UNIFORM_LOCATION("vram"), 0);
glUniform1i(UNIFORM_LOCATION("dispcnt"), glslRenderer->io[0][REG_DISPCNT >> 1]);
glUniform1i(UNIFORM_LOCATION("bg0cnt"), glslRenderer->io[0][REG_BG0CNT >> 1]);
glUniform1i(UNIFORM_LOCATION("bg1cnt"), glslRenderer->io[0][REG_BG1CNT >> 1]);
glUniform1i(UNIFORM_LOCATION("bg2cnt"), glslRenderer->io[0][REG_BG2CNT >> 1]);
glUniform1i(UNIFORM_LOCATION("bg3cnt"), glslRenderer->io[0][REG_BG3CNT >> 1]);
glUniform1i(UNIFORM_LOCATION("bg0hofs"), glslRenderer->io[0][REG_BG0HOFS >> 1]);
glUniform1i(UNIFORM_LOCATION("bg0vofs"), glslRenderer->io[0][REG_BG0VOFS >> 1]);
glUniform1i(UNIFORM_LOCATION("bg1hofs"), glslRenderer->io[0][REG_BG1HOFS >> 1]);
glUniform1i(UNIFORM_LOCATION("bg1vofs"), glslRenderer->io[0][REG_BG1VOFS >> 1]);
glUniform1i(UNIFORM_LOCATION("bg2hofs"), glslRenderer->io[0][REG_BG2HOFS >> 1]);
glUniform1i(UNIFORM_LOCATION("bg2vofs"), glslRenderer->io[0][REG_BG2VOFS >> 1]);
glUniform1i(UNIFORM_LOCATION("bg3hofs"), glslRenderer->io[0][REG_BG3HOFS >> 1]);
glUniform1i(UNIFORM_LOCATION("bg3vofs"), glslRenderer->io[0][REG_BG3VOFS >> 1]);
glEnable(GL_TEXTURE_2D);
glActiveTexture(GL_TEXTURE0);
@ -157,7 +220,7 @@ static void GBAVideoGLSLRendererDeinit(struct GBAVideoRenderer* renderer) {
static void GBAVideoGLSLRendererWritePalette(struct GBAVideoRenderer* renderer, uint32_t address, uint16_t value) {
struct GBAVideoGLSLRenderer* glslRenderer = (struct GBAVideoGLSLRenderer*) renderer;
GLshort color = 0;
GLshort color = 1;
color |= (value & 0x001F) << 11;
color |= (value & 0x03E0) << 1;
color |= (value & 0x7C00) >> 9;