/*
=================
R_ValidateGLSLProgram
makes sure GLSL program is valid
=================
*/
bool R_ValidateGLSLProgram( shaderProgram_t *shaderProgram ) {
GLint validProgram;
qglValidateProgramARB( shaderProgram->program );
qglGetObjectParameterivARB( shaderProgram->program, GL_OBJECT_VALIDATE_STATUS_ARB, &validProgram );
if( !validProgram ) {
common->Printf( "R_ValidateGLSLProgram: program invalid\n" );
return false;
}
return true;
}
static void GLSL_ValidateProgram(GLhandleARB program)
{
GLint validated;
qglValidateProgramARB(program);
qglGetObjectParameterivARB(program, GL_OBJECT_VALIDATE_STATUS_ARB, &validated);
if(!validated)
{
GLSL_PrintInfoLog(program, qfalse);
ri.Printf(PRINT_ALL, "\n");
ri.Error(ERR_DROP, "shaders failed to validate");
}
}
qboolean R_Shader_StartLightPass( unsigned int lightIndex ) {
GLint valid;
R_ShaderLight *light = GetLightFromIndex( lightIndex );
matrix4x4_t *worldToViewMatrix = &r_refdef.lightShader.worldToViewMatrix;
vec3_t lightPosition, newcolor;
float f;
assert( light->active == true );
// setup cubemap texture generation
if( gl_support_cubemaps ) {
matrix4x4_t worldToLightMatrix;
matrix4x4_t viewToWorldMatrix;
matrix4x4_t viewToLightMatrix;
// setup the cubemap
qglSelectTextureARB( GL_TEXTURE1_ARB );
glEnable( GL_TEXTURE_CUBE_MAP_ARB );
glBindTexture( GL_TEXTURE_CUBE_MAP_ARB, GL_LoadCubeTexImage( light->cubemapname, false, true ) );
qglSelectTextureARB( GL_TEXTURE0_ARB );
// invert worldToViewMatrix
worldToLightMatrix = GetWorldToLightMatrix( light );
Matrix4x4_Invert_Simple( &viewToWorldMatrix, worldToViewMatrix );
Matrix4x4_Concat( &viewToLightMatrix, &worldToLightMatrix, &viewToWorldMatrix );
qglUniformMatrix4fvARB( r_refdef.lightShader.viewToLightMatrix, 1, true, (float *)&viewToLightMatrix.m );
}
Matrix4x4_Transform( worldToViewMatrix, light->origin, lightPosition );
//Con_Printf( "Light distance to origin: %f (vs %f)\n", VectorDistance( light->origin, r_refdef.vieworg ), VectorLength( lightPosition ) );
qglUniform3fvARB( r_refdef.lightShader.lightPosition, 1, lightPosition );
f = (light->style >= 0 ? d_lightstylevalue[light->style] : 128) * (1.0f / 256.0f) * r_shadow_lightintensityscale.value;
VectorScale(light->color, f, newcolor);
qglUniform3fvARB( r_refdef.lightShader.lightColor, 1, newcolor );
qglUniform1fARB( r_refdef.lightShader.lightMaxDistance, light->maxDistance );
qglValidateProgramARB( r_refdef.lightShader.programObject );
qglGetObjectParameterivARB( r_refdef.lightShader.programObject, GL_OBJECT_VALIDATE_STATUS_ARB, &valid );
return valid == true;
}