diff options
Diffstat (limited to 'progs/glsl/trirast.c')
-rw-r--r-- | progs/glsl/trirast.c | 87 |
1 files changed, 5 insertions, 82 deletions
diff --git a/progs/glsl/trirast.c b/progs/glsl/trirast.c index 2842755447..67cbac0546 100644 --- a/progs/glsl/trirast.c +++ b/progs/glsl/trirast.c @@ -19,6 +19,7 @@ #include <GL/glut.h> #include <GL/glext.h> #include "extfuncs.h" +#include "shaderutil.h" static GLint WinWidth = 300, WinHeight = 300; @@ -169,67 +170,6 @@ Key(unsigned char key, int x, int y) static void -LoadAndCompileShader(GLuint shader, const char *text) -{ - GLint stat; - - glShaderSource_func(shader, 1, (const GLchar **) &text, NULL); - - glCompileShader_func(shader); - - glGetShaderiv_func(shader, GL_COMPILE_STATUS, &stat); - if (!stat) { - GLchar log[1000]; - GLsizei len; - glGetShaderInfoLog_func(shader, 1000, &len, log); - fprintf(stderr, "fslight: problem compiling shader:\n%s\n", log); - exit(1); - } -} - - -/** - * Read a shader from a file. - */ -static void -ReadShader(GLuint shader, const char *filename) -{ - const int max = 100*1000; - int n; - char *buffer = (char*) malloc(max); - FILE *f = fopen(filename, "r"); - if (!f) { - fprintf(stderr, "fslight: Unable to open shader file %s\n", filename); - exit(1); - } - - n = fread(buffer, 1, max, f); - printf("fslight: read %d bytes from shader file %s\n", n, filename); - if (n > 0) { - buffer[n] = 0; - LoadAndCompileShader(shader, buffer); - } - - fclose(f); - free(buffer); -} - - -static void -CheckLink(GLuint prog) -{ - GLint stat; - glGetProgramiv_func(prog, GL_LINK_STATUS, &stat); - if (!stat) { - GLchar log[1000]; - GLsizei len; - glGetProgramInfoLog_func(prog, 1000, &len, log); - fprintf(stderr, "Linker error:\n%s\n", log); - } -} - - -static void Init(void) { static const char *fragShaderText = @@ -252,33 +192,16 @@ Init(void) "void main() {\n" " gl_Position = gl_ModelViewProjectionMatrix * gl_Vertex;\n" "}\n"; - const char *version; - version = (const char *) glGetString(GL_VERSION); - if (version[0] != '2' || version[1] != '.') { - printf("This program requires OpenGL 2.x, found %s\n", version); + if (!ShadersSupported()) exit(1); - } GetExtensionFuncs(); - fragShader = glCreateShader_func(GL_FRAGMENT_SHADER); - if (FragProgFile) - ReadShader(fragShader, FragProgFile); - else - LoadAndCompileShader(fragShader, fragShaderText); - - vertShader = glCreateShader_func(GL_VERTEX_SHADER); - if (VertProgFile) - ReadShader(vertShader, VertProgFile); - else - LoadAndCompileShader(vertShader, vertShaderText); + vertShader = CompileShaderText(GL_VERTEX_SHADER, vertShaderText); + fragShader = CompileShaderText(GL_FRAGMENT_SHADER, fragShaderText); + program = LinkShaders(vertShader, fragShader); - program = glCreateProgram_func(); - glAttachShader_func(program, fragShader); - glAttachShader_func(program, vertShader); - glLinkProgram_func(program); - CheckLink(program); glUseProgram_func(program); uv0 = glGetUniformLocation_func(program, "v0"); |