git.mutantstargoat.com Git - vrtris/blob - src/opengl.c

   1 #include <stdlib.h>
   2 #include "opengl.h"
   3 #include "logger.h"
   4
   5
   6 static void GLAPIENTRY gldebug_logger(GLenum src, GLenum type, GLuint id, GLenum severity,
   7                 GLsizei len, const char *msg, const void *cls);
   8
   9 static const char *gldebug_srcstr(unsigned int src);
  10 static const char *gldebug_typestr(unsigned int type);
  11
  12 struct GLCaps glcaps;
  13
  14 int init_opengl(void)
  15 {
  16         glewInit();
  17
  18         glcaps.debug = GLEW_ARB_debug_output;
  19
  20 #ifndef NDEBUG
  21         if(glcaps.debug) {
  22                 info_log("Installing OpenGL debug callback\n");
  23                 glDebugMessageCallbackARB(gldebug_logger, 0);
  24         }
  25 #endif
  26
  27         return 0;
  28 }
  29
  30 void dump_gl_texture(unsigned int tex, const char *fname)
  31 {
  32         FILE *fp;
  33         int i, width, height;
  34         unsigned char *pixels;
  35
  36         glBindTexture(GL_TEXTURE_2D, tex);
  37         glGetTexLevelParameteriv(GL_TEXTURE_2D, 0, GL_TEXTURE_WIDTH, &width);
  38         glGetTexLevelParameteriv(GL_TEXTURE_2D, 0, GL_TEXTURE_HEIGHT, &height);
  39
  40         if(!(pixels = malloc(width * height * 3))) {
  41                 return;
  42         }
  43         glGetTexImage(GL_TEXTURE_2D, 0, GL_RGB, GL_UNSIGNED_BYTE, pixels);
  44
  45         if(!(fp = fopen(fname, "wb"))) {
  46                 free(pixels);
  47                 return;
  48         }
  49         fprintf(fp, "P6\n%d %d\n255\n", width, height);
  50         for(i=0; i<width * height * 3; i++) {
  51                 fputc(pixels[i], fp);
  52         }
  53         fclose(fp);
  54         free(pixels);
  55 }
  56
  57
  58 static void GLAPIENTRY gldebug_logger(GLenum src, GLenum type, GLuint id, GLenum severity,
  59                 GLsizei len, const char *msg, const void *cls)
  60 {
  61         static const char *fmt = "[GLDEBUG] (%s) %s: %s\n";
  62         switch(type) {
  63         case GL_DEBUG_TYPE_ERROR:
  64                 error_log(fmt, gldebug_srcstr(src), gldebug_typestr(type), msg);
  65                 break;
  66
  67         case GL_DEBUG_TYPE_UNDEFINED_BEHAVIOR:
  68         case GL_DEBUG_TYPE_PORTABILITY:
  69         case GL_DEBUG_TYPE_PERFORMANCE:
  70                 debug_log(fmt, gldebug_srcstr(src), gldebug_typestr(type), msg);
  71                 break;
  72
  73         default:
  74                 debug_log(fmt, gldebug_srcstr(src), gldebug_typestr(type), msg);
  75         }
  76 }
  77
  78 static const char *gldebug_srcstr(unsigned int src)
  79 {
  80         switch(src) {
  81         case GL_DEBUG_SOURCE_API:
  82                 return "api";
  83         case GL_DEBUG_SOURCE_WINDOW_SYSTEM:
  84                 return "wsys";
  85         case GL_DEBUG_SOURCE_SHADER_COMPILER:
  86                 return "sdrc";
  87         case GL_DEBUG_SOURCE_THIRD_PARTY:
  88                 return "3rdparty";
  89         case GL_DEBUG_SOURCE_APPLICATION:
  90                 return "app";
  91         case GL_DEBUG_SOURCE_OTHER:
  92                 return "other";
  93         default:
  94                 break;
  95         }
  96         return "unknown";
  97 }
  98
  99 static const char *gldebug_typestr(unsigned int type)
 100 {
 101         switch(type) {
 102         case GL_DEBUG_TYPE_ERROR:
 103                 return "error";
 104         case GL_DEBUG_TYPE_DEPRECATED_BEHAVIOR:
 105                 return "deprecated";
 106         case GL_DEBUG_TYPE_UNDEFINED_BEHAVIOR:
 107                 return "undefined behavior";
 108         case GL_DEBUG_TYPE_PORTABILITY:
 109                 return "portability warning";
 110         case GL_DEBUG_TYPE_PERFORMANCE:
 111                 return "performance warning";
 112         case GL_DEBUG_TYPE_OTHER:
 113                 return "other";
 114         default:
 115                 break;
 116         }
 117         return "unknown";
 118 }