mirror of https://github.com/snes9xgit/snes9x.git
595 lines
19 KiB
C++
595 lines
19 KiB
C++
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#include "CGLCG.h"
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#include "wsnes9x.h"
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#include "win32_display.h"
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#include <png.h>
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#ifndef max
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#define max(a, b) (((a) > (b)) ? (a) : (b))
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#endif
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float npot(float desired)
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{
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float out=512.0;
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while(out<desired)
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out*=2;
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return out;
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}
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const GLfloat CGLCG::lut_coords[8] = {0, 0, 1, 0, 1, 1, 0, 1};
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CGLCG::CGLCG(CGcontext cgContext)
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{
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this->cgContext = cgContext;
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fboFunctionsLoaded = FALSE;
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ClearPasses();
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LoadFBOFunctions();
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frameCnt=0;
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}
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CGLCG::~CGLCG(void)
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{
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}
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void CGLCG::ClearPasses()
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{
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if(shaderPasses.size()>1) {
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for(std::vector<shaderPass>::iterator it=(shaderPasses.begin()+1);it!=shaderPasses.end();it++) {
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if(it->cgFragmentProgram)
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cgDestroyProgram(it->cgFragmentProgram);
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if(it->cgVertexProgram)
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cgDestroyProgram(it->cgVertexProgram);
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if(it->fbo)
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glDeleteFramebuffers(1,&it->fbo);
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if(it->tex)
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glDeleteTextures(1,&it->tex);
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}
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}
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for(std::vector<lookupTexture>::iterator it=lookupTextures.begin();it!=lookupTextures.end();it++) {
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if(it->tex)
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glDeleteTextures(1,&it->tex);
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}
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shaderPasses.clear();
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lookupTextures.clear();
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shaderLoaded = false;
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}
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bool CGLCG::LoadFBOFunctions()
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{
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if(fboFunctionsLoaded)
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return true;
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const char *extensions = (const char *) glGetString(GL_EXTENSIONS);
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if(extensions && strstr(extensions, "framebuffer_object")) {
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glGenFramebuffers = (PFNGLGENFRAMEBUFFERSPROC)wglGetProcAddress("glGenFramebuffers");
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glDeleteFramebuffers = (PFNGLDELETEFRAMEBUFFERSPROC)wglGetProcAddress("glDeleteFramebuffers");
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glBindFramebuffer = (PFNGLBINDFRAMEBUFFERPROC)wglGetProcAddress("glBindFramebuffer");
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glFramebufferTexture2D = (PFNGLFRAMEBUFFERTEXTURE2DPROC)wglGetProcAddress("glFramebufferTexture2D");
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glCheckFramebufferStatus = (PFNGLCHECKFRAMEBUFFERSTATUSPROC)wglGetProcAddress("glCheckFramebufferStatus");
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glClientActiveTexture = (PFNGLACTIVETEXTUREPROC)wglGetProcAddress("glClientActiveTexture");
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if(glGenFramebuffers && glDeleteFramebuffers && glBindFramebuffer && glFramebufferTexture2D && glClientActiveTexture) {
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fboFunctionsLoaded = true;
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}
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}
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return fboFunctionsLoaded;
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}
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void CGLCG::checkForCgError(const char *situation)
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{
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char buffer[4096];
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CGerror error = cgGetError();
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const char *string = cgGetErrorString(error);
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if (error != CG_NO_ERROR) {
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sprintf(buffer,
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"Situation: %s\n"
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"Error: %s\n\n"
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"Cg compiler output...\n", situation, string);
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MessageBoxA(0, buffer,
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"Cg error", MB_OK|MB_ICONEXCLAMATION);
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if (error == CG_COMPILER_ERROR) {
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MessageBoxA(0, cgGetLastListing(cgContext),
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"Cg compilation error", MB_OK|MB_ICONEXCLAMATION);
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}
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}
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}
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#define IS_SLASH(x) ((x) == TEXT('\\') || (x) == TEXT('/'))
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bool CGLCG::LoadShader(const TCHAR *shaderFile)
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{
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CCGShader cgShader;
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TCHAR shaderPath[MAX_PATH];
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TCHAR tempPath[MAX_PATH];
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CGprofile vertexProfile, fragmentProfile;
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GLenum error;
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if(!fboFunctionsLoaded) {
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MessageBox(NULL, TEXT("Your OpenGL graphics driver does not support framebuffer objects.\nYou will not be able to use CG shaders in OpenGL mode."), TEXT("CG Error"),
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MB_OK|MB_ICONEXCLAMATION);
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return false;
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}
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vertexProfile = cgGLGetLatestProfile(CG_GL_VERTEX);
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fragmentProfile = cgGLGetLatestProfile(CG_GL_FRAGMENT);
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cgGLDisableProfile(vertexProfile);
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cgGLDisableProfile(fragmentProfile);
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ClearPasses();
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if (shaderFile == NULL || *shaderFile==TEXT('\0'))
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return true;
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lstrcpy(shaderPath,shaderFile);
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for(int i=lstrlen(shaderPath); i>=0; i--){
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if(IS_SLASH(shaderPath[i])){
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shaderPath[i]=TEXT('\0');
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break;
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}
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}
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SetCurrentDirectory(shaderPath);
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if(!cgShader.LoadShader(_tToChar(shaderFile)))
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return false;
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cgGLSetOptimalOptions(vertexProfile);
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cgGLSetOptimalOptions(fragmentProfile);
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shaderPasses.push_back(shaderPass());
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for(std::vector<CCGShader::shaderPass>::iterator it=cgShader.shaderPasses.begin();it!=cgShader.shaderPasses.end();it++) {
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shaderPasses.push_back(shaderPass());
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shaderPass &pass = shaderPasses.back();
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pass.scaleParams = it->scaleParams;
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pass.linearFilter = (pass.scaleParams.scaleTypeX==CG_SCALE_NONE && !it->filterSet)?GUI.BilinearFilter:it->linearFilter;
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_tfullpath(tempPath,_tFromChar(it->cgShaderFile),MAX_PATH);
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char *fileContents = ReadShaderFileContents(tempPath);
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if(!fileContents)
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return false;
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pass.cgVertexProgram = cgCreateProgram( cgContext, CG_SOURCE, fileContents,
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vertexProfile, "main_vertex", NULL);
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checkForCgError("Compiling vertex program");
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pass.cgFragmentProgram = cgCreateProgram( cgContext, CG_SOURCE, fileContents,
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fragmentProfile, "main_fragment", NULL);
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checkForCgError("Compiling fragment program");
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delete [] fileContents;
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if(!pass.cgVertexProgram || !pass.cgFragmentProgram) {
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return false;
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}
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cgGLLoadProgram(pass.cgVertexProgram);
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cgGLLoadProgram(pass.cgFragmentProgram);
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glGenFramebuffers(1,&pass.fbo);
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glGenTextures(1,&pass.tex);
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glBindTexture(GL_TEXTURE_2D,pass.tex);
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glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_BORDER);
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glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_BORDER);
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glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
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glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
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}
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for(std::vector<CCGShader::lookupTexture>::iterator it=cgShader.lookupTextures.begin();it!=cgShader.lookupTextures.end();it++) {
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lookupTextures.push_back(lookupTexture());
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lookupTexture &tex = lookupTextures.back();
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strcpy(tex.id,it->id);
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glGenTextures(1,&tex.tex);
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glBindTexture(GL_TEXTURE_2D,tex.tex);
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glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_BORDER);
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glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_BORDER);
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glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, it->linearfilter?GL_LINEAR:GL_NEAREST);
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glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, it->linearfilter?GL_LINEAR:GL_NEAREST);
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_tfullpath(tempPath,_tFromChar(it->texturePath),MAX_PATH);
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int strLen = strlen(it->texturePath);
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if(strLen>4) {
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if(!strcasecmp(&it->texturePath[strLen-4],".png")) {
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int width, height;
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bool hasAlpha;
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GLubyte *texData;
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if(loadPngImage(tempPath,width,height,hasAlpha,&texData)) {
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glPixelStorei(GL_UNPACK_ROW_LENGTH, width);
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glTexImage2D(GL_TEXTURE_2D, 0, hasAlpha ? 4 : 3, width,
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height, 0, hasAlpha ? GL_RGBA : GL_RGB, GL_UNSIGNED_BYTE, texData);
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free(texData);
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}
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} else if(!strcasecmp(&it->texturePath[strLen-4],".tga")) {
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STGA stga;
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if(loadTGA(tempPath,stga)) {
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glPixelStorei(GL_UNPACK_ROW_LENGTH, stga.width);
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glTexImage2D(GL_TEXTURE_2D, 0, 4, stga.width,
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stga.height, 0, GL_RGBA, GL_UNSIGNED_BYTE, stga.data);
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}
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}
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}
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}
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glClientActiveTexture(GL_TEXTURE1);
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glEnableClientState(GL_TEXTURE_COORD_ARRAY);
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glTexCoordPointer(2,GL_FLOAT,0,lut_coords);
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glClientActiveTexture(GL_TEXTURE0);
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shaderLoaded = true;
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return true;
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}
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void CGLCG::setTexCoords(int pass,xySize inputSize,xySize textureSize,bool topdown)
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{
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float tX = inputSize.x / textureSize.x;
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float tY = inputSize.y / textureSize.y;
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if(topdown) {
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shaderPasses[pass].texcoords[0] = 0.0f;
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shaderPasses[pass].texcoords[1] = tY;
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shaderPasses[pass].texcoords[2] = tX;
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shaderPasses[pass].texcoords[3] = tY;
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shaderPasses[pass].texcoords[4] = tX;
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shaderPasses[pass].texcoords[5] = 0.0f;
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shaderPasses[pass].texcoords[6] = 0.0f;
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shaderPasses[pass].texcoords[7] = 0.0f;
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} else {
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shaderPasses[pass].texcoords[0] = 0.0f;
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shaderPasses[pass].texcoords[1] = 0.0f;
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shaderPasses[pass].texcoords[2] = tX;
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shaderPasses[pass].texcoords[3] = 0.0f;
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shaderPasses[pass].texcoords[4] = tX;
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shaderPasses[pass].texcoords[5] = tY;
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shaderPasses[pass].texcoords[6] = 0.0f;
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shaderPasses[pass].texcoords[7] = tY;
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}
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glTexCoordPointer(2, GL_FLOAT, 0, shaderPasses[pass].texcoords);
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}
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void CGLCG::Render(GLuint origTex, xySize textureSize, xySize inputSize, xySize viewportSize, xySize windowSize)
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{
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GLenum error;
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frameCnt++;
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CGprofile vertexProfile, fragmentProfile;
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if(!shaderLoaded)
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return;
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vertexProfile = cgGLGetLatestProfile(CG_GL_VERTEX);
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fragmentProfile = cgGLGetLatestProfile(CG_GL_FRAGMENT);
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cgGLEnableProfile(vertexProfile);
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cgGLEnableProfile(fragmentProfile);
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shaderPasses[0].tex = origTex;
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shaderPasses[0].outputSize = inputSize;
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shaderPasses[0].textureSize = textureSize;
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for(int i=1;i<shaderPasses.size();i++) {
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switch(shaderPasses[i].scaleParams.scaleTypeX) {
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case CG_SCALE_ABSOLUTE:
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shaderPasses[i].outputSize.x = (double)shaderPasses[i].scaleParams.absX;
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break;
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case CG_SCALE_SOURCE:
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shaderPasses[i].outputSize.x = shaderPasses[i-1].outputSize.x * shaderPasses[i].scaleParams.scaleX;
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break;
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case CG_SCALE_VIEWPORT:
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shaderPasses[i].outputSize.x = viewportSize.x * shaderPasses[i].scaleParams.scaleX;
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break;
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default:
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shaderPasses[i].outputSize.x = viewportSize.x;
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}
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switch(shaderPasses[i].scaleParams.scaleTypeY) {
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case CG_SCALE_ABSOLUTE:
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shaderPasses[i].outputSize.y = (double)shaderPasses[i].scaleParams.absX;
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break;
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case CG_SCALE_SOURCE:
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shaderPasses[i].outputSize.y = shaderPasses[i-1].outputSize.y * shaderPasses[i].scaleParams.scaleY;
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break;
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case CG_SCALE_VIEWPORT:
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shaderPasses[i].outputSize.y = viewportSize.y * shaderPasses[i].scaleParams.scaleY;
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break;
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default:
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shaderPasses[i].outputSize.y = viewportSize.y;
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}
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float texSize = npot(max(shaderPasses[i].outputSize.x,shaderPasses[i].outputSize.y));
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shaderPasses[i].textureSize.x = shaderPasses[i].textureSize.y = texSize;
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setShaderVars(i);
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setTexCoords(i,shaderPasses[i-1].outputSize,shaderPasses[i-1].textureSize);
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cgGLBindProgram(shaderPasses[i].cgVertexProgram);
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cgGLBindProgram(shaderPasses[i].cgFragmentProgram);
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glBindTexture(GL_TEXTURE_2D,shaderPasses[i].tex);
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glTexImage2D(GL_TEXTURE_2D,0,GL_RGB,(unsigned int)shaderPasses[i].textureSize.x,(unsigned int)shaderPasses[i].textureSize.y,0,GL_RGB,GL_UNSIGNED_SHORT_5_6_5,NULL);
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glViewport(0,0,shaderPasses[i].outputSize.x,shaderPasses[i].outputSize.y);
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glBindFramebuffer(GL_FRAMEBUFFER,shaderPasses[i].fbo);
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glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, shaderPasses[i].tex, 0);
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GLenum status = glCheckFramebufferStatus(GL_FRAMEBUFFER);
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glBindTexture(GL_TEXTURE_2D,shaderPasses[i-1].tex);
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glPixelStorei(GL_UNPACK_ROW_LENGTH, (GLint)shaderPasses[i-1].textureSize.x);
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glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, shaderPasses[i].linearFilter?GL_LINEAR:GL_NEAREST);
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glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, shaderPasses[i].linearFilter?GL_LINEAR:GL_NEAREST);
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glClearColor(0.0f, 0.0f, 0.0f, 0.5f);
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glClear(GL_COLOR_BUFFER_BIT);
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glDrawArrays (GL_QUADS, 0, 4);
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}
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glBindFramebuffer(GL_FRAMEBUFFER,0);
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glBindTexture(GL_TEXTURE_2D,shaderPasses.back().tex);
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glPixelStorei(GL_UNPACK_ROW_LENGTH, (GLint)shaderPasses.back().textureSize.x);
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RECT displayRect=CalculateDisplayRect(shaderPasses.back().outputSize.x,shaderPasses.back().outputSize.y,windowSize.x,windowSize.y);
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glViewport(displayRect.left,windowSize.y-displayRect.bottom,displayRect.right-displayRect.left,displayRect.bottom-displayRect.top);
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setTexCoords(shaderPasses.size()-1,shaderPasses.back().outputSize,shaderPasses.back().textureSize,true);
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cgGLDisableProfile(vertexProfile);
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cgGLDisableProfile(fragmentProfile);
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}
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void CGLCG::setShaderVars(int pass)
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{
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float inputSize[2] = {shaderPasses[pass-1].outputSize.x,shaderPasses[pass-1].outputSize.y};
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float textureSize[2] = {shaderPasses[pass-1].textureSize.x,shaderPasses[pass-1].textureSize.y};
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float outputSize[2] = {shaderPasses[pass].outputSize.x,shaderPasses[pass].outputSize.y};
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CGparameter cgpModelViewProj = cgGetNamedParameter(shaderPasses[pass].cgVertexProgram, "modelViewProj");
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cgGLSetStateMatrixParameter(cgpModelViewProj, CG_GL_MODELVIEW_PROJECTION_MATRIX, CG_GL_MATRIX_IDENTITY);
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#define setProgram2fv(pass,varname,floats)\
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{\
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CGparameter cgpf = cgGetNamedParameter(shaderPasses[pass].cgFragmentProgram, varname);\
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CGparameter cgpv = cgGetNamedParameter(shaderPasses[pass].cgVertexProgram, varname);\
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if(cgpf)\
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cgGLSetParameter2fv(cgpf,floats);\
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if(cgpv)\
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cgGLSetParameter2fv(cgpv,floats);\
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}\
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#define setProgram1f(pass,varname,val)\
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{\
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CGparameter cgpf = cgGetNamedParameter(shaderPasses[pass].cgFragmentProgram, varname);\
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CGparameter cgpv = cgGetNamedParameter(shaderPasses[pass].cgVertexProgram, varname);\
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if(cgpf)\
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cgGLSetParameter1f(cgpf,val);\
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if(cgpv)\
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cgGLSetParameter1f(cgpv,val);\
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}\
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#define setTextureParameter(pass,varname,val)\
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{\
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CGparameter cgpf = cgGetNamedParameter(shaderPasses[pass].cgFragmentProgram, varname);\
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if(cgpf) {\
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cgGLSetTextureParameter(cgpf,val);\
|
||
|
cgGLEnableTextureParameter(cgpf);\
|
||
|
}\
|
||
|
}\
|
||
|
|
||
|
#define setTexCoordsParameter(pass,varname,val)\
|
||
|
{\
|
||
|
CGparameter cgpv = cgGetNamedParameter(shaderPasses[pass].cgVertexProgram, varname);\
|
||
|
if(cgpv) {\
|
||
|
cgGLSetParameterPointer(cgpv, 2, GL_FLOAT, 0, val);\
|
||
|
cgGLEnableClientState(cgpv);\
|
||
|
}\
|
||
|
}\
|
||
|
|
||
|
|
||
|
setProgram2fv(pass,"IN.video_size",inputSize);
|
||
|
setProgram2fv(pass,"IN.texture_size",textureSize);
|
||
|
setProgram2fv(pass,"IN.output_size",outputSize);
|
||
|
setProgram1f(pass,"IN.frame_count",(float)frameCnt);
|
||
|
|
||
|
float video_Size[2] = {shaderPasses[0].outputSize.x,shaderPasses[0].outputSize.y};
|
||
|
float texture_Size[2] = {shaderPasses[0].textureSize.x,shaderPasses[0].outputSize.y};
|
||
|
|
||
|
|
||
|
setProgram2fv(pass,"ORIG.video_size",video_Size);
|
||
|
setProgram2fv(pass,"ORIG.texture_size",texture_Size);
|
||
|
setTextureParameter(pass,"ORIG.texture",shaderPasses[0].tex);
|
||
|
setTexCoordsParameter(pass,"ORIG.tex_coord",shaderPasses[0].texcoords);
|
||
|
|
||
|
for(int i=0;i<lookupTextures.size();i++) {
|
||
|
setTextureParameter(pass,lookupTextures[i].id,lookupTextures[i].tex);
|
||
|
}
|
||
|
|
||
|
if(pass>1) {
|
||
|
for(int i=1;i<pass-1;i++) {
|
||
|
char varname[100];
|
||
|
float video_Size[2] = {shaderPasses[i].outputSize.x,shaderPasses[i].outputSize.y};
|
||
|
float texture_Size[2] = {shaderPasses[i].textureSize.x,shaderPasses[i].outputSize.y};
|
||
|
sprintf(varname,"PASS%d.video_size",i);
|
||
|
setProgram2fv(i,varname,video_Size);
|
||
|
sprintf(varname,"PASS%d.texture_size",i);
|
||
|
setProgram2fv(i,varname,texture_Size);
|
||
|
sprintf(varname,"PASS%d.texture",i);
|
||
|
setTextureParameter(i,varname,shaderPasses[i].tex);
|
||
|
sprintf(varname,"PASS%d.tex_coord",i);
|
||
|
setTexCoordsParameter(i,varname,shaderPasses[i].texcoords);
|
||
|
}
|
||
|
}
|
||
|
}
|
||
|
|
||
|
bool CGLCG::loadPngImage(const TCHAR *name, int &outWidth, int &outHeight, bool &outHasAlpha, GLubyte **outData) {
|
||
|
png_structp png_ptr;
|
||
|
png_infop info_ptr;
|
||
|
unsigned int sig_read = 0;
|
||
|
int color_type, interlace_type;
|
||
|
FILE *fp;
|
||
|
|
||
|
if ((fp = _tfopen(name, TEXT("rb"))) == NULL)
|
||
|
return false;
|
||
|
|
||
|
/* Create and initialize the png_struct
|
||
|
* with the desired error handler
|
||
|
* functions. If you want to use the
|
||
|
* default stderr and longjump method,
|
||
|
* you can supply NULL for the last
|
||
|
* three parameters. We also supply the
|
||
|
* the compiler header file version, so
|
||
|
* that we know if the application
|
||
|
* was compiled with a compatible version
|
||
|
* of the library. REQUIRED
|
||
|
*/
|
||
|
png_ptr = png_create_read_struct(PNG_LIBPNG_VER_STRING,
|
||
|
NULL, NULL, NULL);
|
||
|
|
||
|
if (png_ptr == NULL) {
|
||
|
fclose(fp);
|
||
|
return false;
|
||
|
}
|
||
|
|
||
|
/* Allocate/initialize the memory
|
||
|
* for image information. REQUIRED. */
|
||
|
info_ptr = png_create_info_struct(png_ptr);
|
||
|
if (info_ptr == NULL) {
|
||
|
fclose(fp);
|
||
|
png_destroy_read_struct(&png_ptr, png_infopp_NULL, png_infopp_NULL);
|
||
|
return false;
|
||
|
}
|
||
|
|
||
|
/* Set error handling if you are
|
||
|
* using the setjmp/longjmp method
|
||
|
* (this is the normal method of
|
||
|
* doing things with libpng).
|
||
|
* REQUIRED unless you set up
|
||
|
* your own error handlers in
|
||
|
* the png_create_read_struct()
|
||
|
* earlier.
|
||
|
*/
|
||
|
if (setjmp(png_jmpbuf(png_ptr))) {
|
||
|
/* Free all of the memory associated
|
||
|
* with the png_ptr and info_ptr */
|
||
|
png_destroy_read_struct(&png_ptr, &info_ptr, png_infopp_NULL);
|
||
|
fclose(fp);
|
||
|
/* If we get here, we had a
|
||
|
* problem reading the file */
|
||
|
return false;
|
||
|
}
|
||
|
|
||
|
/* Set up the output control if
|
||
|
* you are using standard C streams */
|
||
|
png_init_io(png_ptr, fp);
|
||
|
|
||
|
/* If we have already
|
||
|
* read some of the signature */
|
||
|
png_set_sig_bytes(png_ptr, sig_read);
|
||
|
|
||
|
/*
|
||
|
* If you have enough memory to read
|
||
|
* in the entire image at once, and
|
||
|
* you need to specify only
|
||
|
* transforms that can be controlled
|
||
|
* with one of the PNG_TRANSFORM_*
|
||
|
* bits (this presently excludes
|
||
|
* dithering, filling, setting
|
||
|
* background, and doing gamma
|
||
|
* adjustment), then you can read the
|
||
|
* entire image (including pixels)
|
||
|
* into the info structure with this
|
||
|
* call
|
||
|
*
|
||
|
* PNG_TRANSFORM_STRIP_16 |
|
||
|
* PNG_TRANSFORM_PACKING forces 8 bit
|
||
|
* PNG_TRANSFORM_EXPAND forces to
|
||
|
* expand a palette into RGB
|
||
|
*/
|
||
|
png_read_png(png_ptr, info_ptr, PNG_TRANSFORM_STRIP_16 | PNG_TRANSFORM_PACKING | PNG_TRANSFORM_EXPAND, png_voidp_NULL);
|
||
|
|
||
|
outWidth = info_ptr->width;
|
||
|
outHeight = info_ptr->height;
|
||
|
switch (info_ptr->color_type) {
|
||
|
case PNG_COLOR_TYPE_RGBA:
|
||
|
outHasAlpha = true;
|
||
|
break;
|
||
|
case PNG_COLOR_TYPE_RGB:
|
||
|
outHasAlpha = false;
|
||
|
break;
|
||
|
default:
|
||
|
png_destroy_read_struct(&png_ptr, &info_ptr, NULL);
|
||
|
fclose(fp);
|
||
|
return false;
|
||
|
}
|
||
|
unsigned int row_bytes = png_get_rowbytes(png_ptr, info_ptr);
|
||
|
*outData = (unsigned char*) malloc(row_bytes * outHeight);
|
||
|
|
||
|
png_bytepp row_pointers = png_get_rows(png_ptr, info_ptr);
|
||
|
|
||
|
for (int i = 0; i < outHeight; i++) {
|
||
|
memcpy(*outData+(row_bytes * i), row_pointers[i], row_bytes);
|
||
|
}
|
||
|
|
||
|
/* Clean up after the read,
|
||
|
* and free any memory allocated */
|
||
|
png_destroy_read_struct(&png_ptr, &info_ptr, png_infopp_NULL);
|
||
|
|
||
|
/* Close the file */
|
||
|
fclose(fp);
|
||
|
|
||
|
/* That's it */
|
||
|
return true;
|
||
|
}
|
||
|
|
||
|
bool CGLCG::loadTGA(const TCHAR *filename, STGA& tgaFile)
|
||
|
{
|
||
|
FILE *file;
|
||
|
unsigned char type[4];
|
||
|
unsigned char info[6];
|
||
|
|
||
|
file = _tfopen(filename, TEXT("rb"));
|
||
|
|
||
|
if (!file)
|
||
|
return false;
|
||
|
|
||
|
fread (&type, sizeof (char), 3, file);
|
||
|
fseek (file, 12, SEEK_SET);
|
||
|
fread (&info, sizeof (char), 6, file);
|
||
|
|
||
|
//image type either 2 (color) or 3 (greyscale)
|
||
|
if (type[1] != 0 || (type[2] != 2 && type[2] != 3))
|
||
|
{
|
||
|
fclose(file);
|
||
|
return false;
|
||
|
}
|
||
|
|
||
|
tgaFile.width = info[0] + info[1] * 256;
|
||
|
tgaFile.height = info[2] + info[3] * 256;
|
||
|
tgaFile.byteCount = info[4] / 8;
|
||
|
|
||
|
if (tgaFile.byteCount != 3 && tgaFile.byteCount != 4) {
|
||
|
fclose(file);
|
||
|
return false;
|
||
|
}
|
||
|
|
||
|
long imageSize = tgaFile.width * tgaFile.height * tgaFile.byteCount;
|
||
|
|
||
|
//allocate memory for image data
|
||
|
unsigned char *tempBuf = new unsigned char[imageSize];
|
||
|
tgaFile.data = new unsigned char[tgaFile.width * tgaFile.height * 4];
|
||
|
|
||
|
//read in image data
|
||
|
fread(tempBuf, sizeof(unsigned char), imageSize, file);
|
||
|
|
||
|
//swap line order and convert to RBGA
|
||
|
for(int i=0;i<tgaFile.height;i++) {
|
||
|
unsigned char* source = tempBuf + tgaFile.width * (tgaFile.height - 1 - i) * tgaFile.byteCount;
|
||
|
unsigned char* destination = tgaFile.data + tgaFile.width * i * 4;
|
||
|
for(int j=0;j<tgaFile.width;j++) {
|
||
|
destination[0]=source[2];
|
||
|
destination[1]=source[1];
|
||
|
destination[2]=source[0];
|
||
|
destination[3]=tgaFile.byteCount==4?source[3]:0xff;
|
||
|
source+=tgaFile.byteCount;
|
||
|
destination+=4;
|
||
|
}
|
||
|
}
|
||
|
delete [] tempBuf;
|
||
|
tgaFile.byteCount = 4;
|
||
|
|
||
|
//close file
|
||
|
fclose(file);
|
||
|
|
||
|
return true;
|
||
|
}
|