75 lines
1.9 KiB
C
75 lines
1.9 KiB
C
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#include <limits.h>
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#include "private.h"
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static GLfloat FOG_START = 0.0f;
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static GLfloat FOG_END = 1.0f;
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static GLfloat FOG_DENSITY = 1.0f;
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static GLenum FOG_MODE = GL_EXP;
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static GLfloat FOG_COLOR [] = {0.0f, 0.0f, 0.0f, 0.0f};
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static void updatePVRFog() {
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if(FOG_MODE == GL_LINEAR) {
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GPUSetFogLinear(FOG_START, FOG_END);
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} else if(FOG_MODE == GL_EXP) {
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GPUSetFogExp(FOG_DENSITY);
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} else if(FOG_MODE == GL_EXP2) {
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GPUSetFogExp2(FOG_DENSITY);
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}
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GPUSetFogColor(FOG_COLOR[3], FOG_COLOR[0], FOG_COLOR[1], FOG_COLOR[2]);
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}
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void APIENTRY glFogf(GLenum pname, GLfloat param) {
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switch(pname) {
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case GL_FOG_MODE: {
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FOG_MODE = (GLenum) param;
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updatePVRFog();
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} break;
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case GL_FOG_DENSITY: {
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FOG_DENSITY = param;
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updatePVRFog();
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} break;
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case GL_FOG_START: {
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FOG_START = param;
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updatePVRFog();
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} break;
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case GL_FOG_END: {
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FOG_END = param;
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updatePVRFog();
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} break;
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case GL_FOG_INDEX:
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default: {
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_glKosThrowError(GL_INVALID_ENUM, __func__);
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_glKosPrintError();
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}
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}
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}
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void APIENTRY glFogi(GLenum pname, GLint param) {
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glFogf(pname, (GLfloat) param);
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}
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void APIENTRY glFogfv(GLenum pname, const GLfloat* params) {
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if(pname == GL_FOG_COLOR) {
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FOG_COLOR[0] = params[0];
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FOG_COLOR[1] = params[1];
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FOG_COLOR[2] = params[2];
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FOG_COLOR[3] = params[3];
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updatePVRFog();
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} else {
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glFogf(pname, *params);
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}
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}
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void APIENTRY glFogiv(GLenum pname, const GLint* params) {
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if(pname == GL_FOG_COLOR) {
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FOG_COLOR[0] = ((GLfloat) params[0]) / (GLfloat) INT_MAX;
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FOG_COLOR[1] = ((GLfloat) params[1]) / (GLfloat) INT_MAX;
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FOG_COLOR[2] = ((GLfloat) params[2]) / (GLfloat) INT_MAX;
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FOG_COLOR[3] = ((GLfloat) params[3]) / (GLfloat) INT_MAX;
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updatePVRFog();
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} else {
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glFogi(pname, *params);
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}
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}
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