Replace duplicated code with new shaderutil.c functions
diff --git a/progs/glsl/texdemo1.c b/progs/glsl/texdemo1.c
index d29ecf4..3dd19ea 100644
--- a/progs/glsl/texdemo1.c
+++ b/progs/glsl/texdemo1.c
@@ -31,6 +31,7 @@
#include "GL/glut.h"
#include "readtex.h"
#include "extfuncs.h"
+#include "shaderutil.h"
static const char *Demo = "texdemo1";
@@ -50,39 +51,20 @@
static GLboolean Anim = GL_TRUE;
-struct uniform_info {
- const char *name;
- GLuint size;
- GLint location;
- GLenum type; /**< GL_FLOAT or GL_INT */
- GLfloat value[4];
-};
-
static struct uniform_info ReflectUniforms[] = {
- { "cubeTex", 1, -1, GL_INT, { 0, 0, 0, 0 } },
- { "lightPos", 3, -1, GL_FLOAT, { 10, 10, 20, 0 } },
- { NULL, 0, 0, 0, { 0, 0, 0, 0 } }
+ { "cubeTex", 1, GL_INT, { 0, 0, 0, 0 }, -1 },
+ { "lightPos", 3, GL_FLOAT, { 10, 10, 20, 0 }, -1 },
+ END_OF_UNIFORMS
};
static struct uniform_info SimpleUniforms[] = {
- { "tex2d", 1, -1, GL_INT, { 1, 0, 0, 0 } },
- { "lightPos", 3, -1, GL_FLOAT, { 10, 10, 20, 0 } },
- { NULL, 0, 0, 0, { 0, 0, 0, 0 } }
+ { "tex2d", 1, GL_INT, { 1, 0, 0, 0 }, -1 },
+ { "lightPos", 3, GL_FLOAT, { 10, 10, 20, 0 }, -1 },
+ END_OF_UNIFORMS
};
static void
-CheckError(int line)
-{
- GLenum err = glGetError();
- if (err) {
- printf("GL Error %s (0x%x) at line %d\n",
- gluErrorString(err), (int) err, line);
- }
-}
-
-
-static void
DrawGround(GLfloat size)
{
glPushMatrix();
@@ -386,132 +368,19 @@
}
-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, "%s: problem compiling shader: %s\n", Demo, log);
- exit(1);
- }
- else {
- printf("Shader compiled OK\n");
- }
-}
-
-
-/**
- * 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, "%s: Unable to open shader file %s\n", Demo, filename);
- exit(1);
- }
-
- n = fread(buffer, 1, max, f);
- printf("%s: read %d bytes from shader file %s\n", Demo, 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);
- }
- else {
- fprintf(stderr, "Link success!\n");
- }
-}
-
-
static GLuint
CreateProgram(const char *vertProgFile, const char *fragProgFile,
struct uniform_info *uniforms)
{
- GLuint fragShader = 0, vertShader = 0, program = 0;
- GLint i;
+ GLuint fragShader, vertShader, program;
- program = glCreateProgram_func();
- if (vertProgFile) {
- vertShader = glCreateShader_func(GL_VERTEX_SHADER);
- ReadShader(vertShader, vertProgFile);
- glAttachShader_func(program, vertShader);
- }
-
- if (fragProgFile) {
- fragShader = glCreateShader_func(GL_FRAGMENT_SHADER);
- ReadShader(fragShader, fragProgFile);
- glAttachShader_func(program, fragShader);
- }
-
- glLinkProgram_func(program);
- CheckLink(program);
+ vertShader = CompileShaderFile(GL_VERTEX_SHADER, vertProgFile);
+ fragShader = CompileShaderFile(GL_FRAGMENT_SHADER, fragProgFile);
+ program = LinkShaders(vertShader, fragShader);
glUseProgram_func(program);
- assert(glIsProgram_func(program));
- assert(glIsShader_func(fragShader));
- assert(glIsShader_func(vertShader));
-
- CheckError(__LINE__);
- for (i = 0; uniforms[i].name; i++) {
- uniforms[i].location
- = glGetUniformLocation_func(program, uniforms[i].name);
- printf("Uniform %s location: %d\n", uniforms[i].name,
- uniforms[i].location);
-
- switch (uniforms[i].size) {
- case 1:
- if (uniforms[i].type == GL_INT)
- glUniform1i_func(uniforms[i].location,
- (GLint) uniforms[i].value[0]);
- else
- glUniform1fv_func(uniforms[i].location, 1, uniforms[i].value);
- break;
- case 2:
- glUniform2fv_func(uniforms[i].location, 1, uniforms[i].value);
- break;
- case 3:
- glUniform3fv_func(uniforms[i].location, 1, uniforms[i].value);
- break;
- case 4:
- glUniform4fv_func(uniforms[i].location, 1, uniforms[i].value);
- break;
- default:
- abort();
- }
- }
-
- CheckError(__LINE__);
+ InitUniforms(program, uniforms);
return program;
}