/*
=================
R_LoadGLSLShader
loads GLSL vertex or fragment shaders
=================
*/
void R_LoadGLSLShader( const char *name, shaderProgram_t *shaderProgram, GLenum type ) {
char *fileBuffer;
char *buffer;
idStr fullPath = "gl2progs/";
fullPath += name;
common->Printf( "%s", fullPath.c_str() );
// load the program even if we don't support it, so
// fs_copyfiles can generate cross-platform data dumps
fileSystem->ReadFile( fullPath.c_str(), (void **)&fileBuffer, NULL );
if ( !fileBuffer ) {
common->Printf( ": File not found\n" );
return;
}
// copy to stack memory and free
buffer = (char *)_alloca( strlen( fileBuffer ) + 1 );
strcpy( buffer, fileBuffer );
fileSystem->FreeFile( fileBuffer );
if ( !glConfig.isInitialized ) {
return;
}
switch( type ) {
case GL_VERTEX_SHADER_ARB:
// create vertex shader
shaderProgram->vertexShader = qglCreateShaderObjectARB( GL_VERTEX_SHADER_ARB );
qglShaderSourceARB( shaderProgram->vertexShader, 1, (const GLcharARB **)&buffer, 0 );
qglCompileShaderARB( shaderProgram->vertexShader );
break;
case GL_FRAGMENT_SHADER_ARB:
// create fragment shader
shaderProgram->fragmentShader = qglCreateShaderObjectARB( GL_FRAGMENT_SHADER_ARB );
qglShaderSourceARB( shaderProgram->fragmentShader, 1, (const GLcharARB **)&buffer, 0 );
qglCompileShaderARB( shaderProgram->fragmentShader );
break;
default:
common->Printf( "R_LoadGLSLShader: no type\n" );
return;
}
common->Printf( "\n" );
}
static GLhandleARB R_CompileGLSLShader( GLhandleARB programObject, GLenum shaderType, unsigned int sourceStringCount, const char *sourceStrings[] ) {
GLhandleARB shaderObject;
GLint shaderCompiled;
const char *shaderName;
int i;
char compileLog[ 4096 ];
if( shaderType == GL_VERTEX_SHADER_ARB ) {
shaderName = "vertex shader";
} else {
shaderName = "fragment shader";
}
// run a basic error check
for (i = 0 ; i < sourceStringCount ; i++)
{
if (sourceStrings[i] == 0)
{
Con_Printf("R_CompileGLSLShader: string #%i of %s is NULL!\n", i, shaderName);
return 0;
}
}
// R_CheckError();
shaderObject = qglCreateShaderObjectARB( shaderType );
if( shaderObject == 0 )
{
// R_CheckError();
return 0;
}
if( sourceStringCount != 0 ) {
qglShaderSourceARB( shaderObject, sourceStringCount, sourceStrings, NULL);
qglCompileShaderARB( shaderObject );
// R_CheckError();
qglGetObjectParameterivARB( shaderObject, GL_OBJECT_COMPILE_STATUS_ARB, &shaderCompiled );
qglGetInfoLogARB( shaderObject, sizeof(compileLog), NULL, compileLog);
if( *compileLog ) {
Con_Printf("%s compile log:\n%s\n", shaderName, compileLog);
}
if( !shaderCompiled ) {
qglDeleteObjectARB( shaderObject );
// R_CheckError();
return 0;
}
}
// TODO: check whether an empty shader object can be compiled!
qglAttachObjectARB( programObject, shaderObject);
qglDeleteObjectARB( shaderObject );
//R_CheckError();
return shaderObject;
}
static void R_InitFragmentShader( const char *filename, GLhandleARB *fragmentShader, GLhandleARB *program, GLhandleARB vertexShader, const char *fallbackShader ) {
int len;
int slen;
void *shaderSource;
char *text;
qboolean fallback = qfalse;
if ( !glsl ) {
return;
}
Com_VPrintf( "^5%s ->\n", filename );
*fragmentShader = qglCreateShaderObjectARB( GL_FRAGMENT_SHADER_ARB );
len = ri.FS_ReadFile( filename, &shaderSource );
if ( len <= 0 ) {
len = strlen(fallbackShader);
if ( len ) {
Com_VPrintf( "^1using fallback shader\n" );
//ri.FS_FreeFile(shaderSource);
//shaderSource = (void *)fallbackShader;
fallback = qtrue;
} else {
Com_VPrintf( "^1couldn't find file\n" );
R_DeleteGlslShadersAndPrograms();
glsl = qfalse;
return;
}
}
slen = strlen(ShaderExtensions);
text = (char *)malloc(len + slen + 3);
if (!text) {
Com_VPrintf( "R_InitFragmentShader() couldn't allocate memory for GLSL shader file\n" );
if ( !fallbackShader ) ri.FS_FreeFile(shaderSource);
qglDeleteObjectARB(*fragmentShader);
return;
}
Com_sprintf( text, len + slen + 3, "%s\n%s\n", ShaderExtensions, fallback ? fallbackShader : (char *)shaderSource );
qglShaderSourceARB(*fragmentShader, 1, (const char **)&text, NULL);
qglCompileShaderARB(*fragmentShader);
printGlslLog(*fragmentShader);
if ( !fallbackShader ) ri.FS_FreeFile(shaderSource);
free(text);
*program = qglCreateProgramObjectARB();
qglAttachObjectARB(*program, vertexShader);
qglAttachObjectARB(*program, *fragmentShader);
qglLinkProgramARB(*program);
printGlslLog(*program);
//Com_VPrintf("\n");
}
static int GLSL_CompileGPUShader(GLhandleARB program, GLhandleARB *prevShader, const GLcharARB *buffer, int size, GLenum shaderType)
{
GLint compiled;
GLhandleARB shader;
shader = qglCreateShaderObjectARB(shaderType);
qglShaderSourceARB(shader, 1, (const GLcharARB **)&buffer, &size);
// compile shader
qglCompileShaderARB(shader);
// check if shader compiled
qglGetObjectParameterivARB(shader, GL_OBJECT_COMPILE_STATUS_ARB, &compiled);
if(!compiled)
{
GLSL_PrintShaderSource(shader);
GLSL_PrintInfoLog(shader, qfalse);
ri.Error(ERR_DROP, "Couldn't compile shader");
return 0;
}
//GLSL_PrintInfoLog(shader, qtrue);
//GLSL_PrintShaderSource(shader);
if (*prevShader)
{
qglDetachObjectARB(program, *prevShader);
qglDeleteObjectARB(*prevShader);
}
// attach shader to program
qglAttachObjectARB(program, shader);
*prevShader = shader;
return 1;
}
void InitGlslShadersAndPrograms( void ) {
void *shaderSource;
GLenum target;
float bloomTextureScale;
int ret;
if ( !r_enablePostProcess->integer || !glsl ) {
return;
}
GL_SelectTexture(0);
qglDisable( GL_TEXTURE_2D );
qglEnable( GL_TEXTURE_RECTANGLE_ARB );
bloomTextureScale = r_BloomTextureScale->value;
if ( bloomTextureScale < 0.01 ) {
bloomTextureScale = 0.01;
} else if ( bloomTextureScale > 1 ) {
bloomTextureScale = 1;
}
target = GL_TEXTURE_RECTANGLE_ARB;
tr.bloomWidth = glConfig.vidWidth * bloomTextureScale;
tr.bloomHeight = glConfig.vidHeight * bloomTextureScale;
qglGenTextures(1, &tr.bloomTexture);
qglBindTexture(target, tr.bloomTexture);
qglTexImage2D(target, 0, GL_RGBA8, tr.bloomWidth, tr.bloomHeight, 0, GL_RGBA, GL_UNSIGNED_BYTE, 0);
qglTexParameteri(target, GL_TEXTURE_WRAP_S, r_glClampToEdge->integer ? GL_CLAMP_TO_EDGE : GL_CLAMP);
qglTexParameteri(target, GL_TEXTURE_WRAP_T, r_glClampToEdge->integer ? GL_CLAMP_TO_EDGE : GL_CLAMP);
qglTexParameteri(target, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
qglTexParameteri(target, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
target = GL_TEXTURE_RECTANGLE_ARB;
qglGenTextures(1, &tr.backBufferTexture);
qglBindTexture(target, tr.backBufferTexture);
qglTexImage2D(target, 0, GL_RGB8, glConfig.vidWidth, glConfig.vidHeight, 0, GL_RGB, GL_UNSIGNED_BYTE, 0);
qglTexParameteri(target, GL_TEXTURE_WRAP_S, r_glClampToEdge->integer ? GL_CLAMP_TO_EDGE : GL_CLAMP);
qglTexParameteri(target, GL_TEXTURE_WRAP_T, r_glClampToEdge->integer ? GL_CLAMP_TO_EDGE : GL_CLAMP);
qglTexParameteri(target, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
qglTexParameteri(target, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
qglDisable(GL_TEXTURE_RECTANGLE_ARB);
qglEnable(GL_TEXTURE_2D);
GL_SelectTexture(0);
Com_VPrintf("^5scripts/posteffect.vs ->\n");
ret = ri.FS_ReadFile("scripts/posteffect.vs", &shaderSource);
if (ret > 0) {
tr.mainVs = qglCreateShaderObjectARB(GL_VERTEX_SHADER_ARB);
qglShaderSourceARB(tr.mainVs, 1, (const char **)&shaderSource, NULL);
qglCompileShaderARB(tr.mainVs);
printGlslLog(tr.mainVs);
ri.FS_FreeFile(shaderSource);
} else if ( strlen(fallbackShader_posteffect) ) {
Com_VPrintf("^1file not found, using fallback shader\n");
//ri.FS_FreeFile(shaderSource);
tr.mainVs = qglCreateShaderObjectARB(GL_VERTEX_SHADER_ARB);
qglShaderSourceARB(tr.mainVs, 1, &fallbackShader_posteffect, NULL);
qglCompileShaderARB(tr.mainVs);
printGlslLog(tr.mainVs);
} else {
Com_VPrintf("^1file not found\n");
glsl = qfalse;
R_DeleteGlslShadersAndPrograms();
}
R_InitFragmentShader( "scripts/colorcorrect.fs", &tr.colorCorrectFs, &tr.colorCorrectSp, tr.mainVs, fallbackShader_colorcorrect );
R_InitFragmentShader( "scripts/blurhoriz.fs", &tr.blurHorizFs, &tr.blurHorizSp, tr.mainVs, fallbackShader_blurhoriz );
R_InitFragmentShader( "scripts/blurvertical.fs", &tr.blurVerticalFs, &tr.blurVerticalSp, tr.mainVs, fallbackShader_blurvertical );
R_InitFragmentShader( "scripts/brightpass.fs", &tr.brightPassFs, &tr.brightPassSp, tr.mainVs, fallbackShader_brightpass );
R_InitFragmentShader( "scripts/combine.fs", &tr.combineFs, &tr.combineSp, tr.mainVs, fallbackShader_combine );
R_InitFragmentShader( "scripts/downsample1.fs", &tr.downSample1Fs, &tr.downSample1Sp, tr.mainVs, fallbackShader_downsample1 );
}
/*
=================
R_LoadGLSLShader
loads GLSL vertex or fragment shaders
=================
*/
bool R_LoadGLSLShader( const char *name, shaderProgram_t *shaderProgram, GLenum type ) {
idStr fullPath = "gl2progs/";
fullPath += name;
char *fileBuffer;
char *buffer;
common->Printf( "%s", fullPath.c_str() );
// load the program even if we don't support it, so
// fs_copyfiles can generate cross-platform data dumps
fileSystem->ReadFile( fullPath.c_str(), (void **)&fileBuffer, NULL );
if ( !fileBuffer ) {
common->Printf( ": File not found\n" );
return false;
}
// copy to stack memory and free
buffer = (char *)_alloca( strlen( fileBuffer ) + 1 );
strcpy( buffer, fileBuffer );
fileSystem->FreeFile( fileBuffer );
if ( !glConfig.isInitialized ) {
return false;
}
GLuint shader;
switch( type ) {
case GL_VERTEX_SHADER_ARB:
if (shaderProgram->vertexShader != -1)
qglDeleteShader(shaderProgram->vertexShader);
shaderProgram->vertexShader = -1;
// create vertex shader
shader = qglCreateShaderObjectARB( GL_VERTEX_SHADER_ARB );
qglShaderSourceARB( shader, 1, (const GLcharARB **)&buffer, 0 );
qglCompileShaderARB( shader );
break;
case GL_FRAGMENT_SHADER_ARB:
if (shaderProgram->fragmentShader != -1)
qglDeleteShader(shaderProgram->fragmentShader);
shaderProgram->fragmentShader = -1;
// create fragment shader
shader = qglCreateShaderObjectARB( GL_FRAGMENT_SHADER_ARB );
qglShaderSourceARB( shader, 1, (const GLcharARB **)&buffer, 0 );
qglCompileShaderARB( shader );
break;
default:
common->Printf( "R_LoadGLSLShader: no type\n" );
return false;
}
GLint logLength;
qglGetShaderiv(shader, GL_INFO_LOG_LENGTH, &logLength);
if (logLength > 1)
{
GLchar *log = (GLchar *)malloc(logLength);
qglGetShaderInfoLog(shader, logLength, &logLength, log);
common->Printf((const char*)log);
free(log);
}
GLint status;
qglGetShaderiv(shader, GL_COMPILE_STATUS, &status);
if (status == 0)
{
qglDeleteShader(shader);
return false;
}
switch( type ) {
case GL_VERTEX_SHADER_ARB: shaderProgram->vertexShader = shader; break;
case GL_FRAGMENT_SHADER_ARB: shaderProgram->fragmentShader = shader; break;
}
common->Printf( "\n" );
return true;
}