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Diffstat (limited to 'progs/glsl/toyball.c')
-rw-r--r--progs/glsl/toyball.c159
1 files changed, 23 insertions, 136 deletions
diff --git a/progs/glsl/toyball.c b/progs/glsl/toyball.c
index 3aa096161a..b870435f66 100644
--- a/progs/glsl/toyball.c
+++ b/progs/glsl/toyball.c
@@ -13,6 +13,7 @@
#include <GL/glut.h>
#include <GL/glext.h>
#include "extfuncs.h"
+#include "shaderutil.h"
static char *FragProgFile = "CH11-toyball.frag.txt";
@@ -24,30 +25,23 @@ static GLuint vertShader;
static GLuint program;
-struct uniform_info {
- const char *name;
- GLuint size;
- GLint location;
- GLfloat value[4];
-};
-
static struct uniform_info Uniforms[] = {
- { "LightDir", 4, -1, { 0.57737, 0.57735, 0.57735, 0.0 } },
- { "HVector", 4, -1, { 0.32506, 0.32506, 0.88808, 0.0 } },
- { "BallCenter", 4, -1, { 0.0, 0.0, 0.0, 1.0 } },
- { "SpecularColor", 4, -1, { 0.4, 0.4, 0.4, 60.0 } },
- { "Red", 4, -1, { 0.6, 0.0, 0.0, 1.0 } },
- { "Blue", 4, -1, { 0.0, 0.3, 0.6, 1.0 } },
- { "Yellow", 4, -1, { 0.6, 0.5, 0.0, 1.0 } },
- { "HalfSpace0", 4, -1, { 1.0, 0.0, 0.0, 0.2 } },
- { "HalfSpace1", 4, -1, { 0.309016994, 0.951056516, 0.0, 0.2 } },
- { "HalfSpace2", 4, -1, { -0.809016994, 0.587785252, 0.0, 0.2 } },
- { "HalfSpace3", 4, -1, { -0.809016994, -0.587785252, 0.0, 0.2 } },
- { "HalfSpace4", 4, -1, { 0.309116994, -0.951056516, 0.0, 0.2 } },
- { "InOrOutInit", 1, -1, { -3.0, 0, 0, 0 } },
- { "StripeWidth", 1, -1, { 0.3, 0, 0, 0 } },
- { "FWidth", 1, -1, { 0.005, 0, 0, 0 } },
- { NULL, 0, 0, { 0, 0, 0, 0 } }
+ { "LightDir", 4, GL_FLOAT, { 0.57737, 0.57735, 0.57735, 0.0 }, -1 },
+ { "HVector", 4, GL_FLOAT, { 0.32506, 0.32506, 0.88808, 0.0 }, -1 },
+ { "BallCenter", 4, GL_FLOAT, { 0.0, 0.0, 0.0, 1.0 }, -1 },
+ { "SpecularColor", 4, GL_FLOAT, { 0.4, 0.4, 0.4, 60.0 }, -1 },
+ { "Red", 4, GL_FLOAT, { 0.6, 0.0, 0.0, 1.0 }, -1 },
+ { "Blue", 4, GL_FLOAT, { 0.0, 0.3, 0.6, 1.0 }, -1 },
+ { "Yellow", 4, GL_FLOAT, { 0.6, 0.5, 0.0, 1.0 }, -1 },
+ { "HalfSpace0", 4, GL_FLOAT, { 1.0, 0.0, 0.0, 0.2 }, -1 },
+ { "HalfSpace1", 4, GL_FLOAT, { 0.309016994, 0.951056516, 0.0, 0.2 }, -1 },
+ { "HalfSpace2", 4, GL_FLOAT, { -0.809016994, 0.587785252, 0.0, 0.2 }, -1 },
+ { "HalfSpace3", 4, GL_FLOAT, { -0.809016994, -0.587785252, 0.0, 0.2 }, -1 },
+ { "HalfSpace4", 4, GL_FLOAT, { 0.309116994, -0.951056516, 0.0, 0.2 }, -1 },
+ { "InOrOutInit", 1, GL_FLOAT, { -3.0, 0, 0, 0 }, -1 },
+ { "StripeWidth", 1, GL_FLOAT, { 0.3, 0, 0, 0 }, -1 },
+ { "FWidth", 1, GL_FLOAT, { 0.005, 0, 0, 0 }, -1 },
+ END_OF_UNIFORMS
};
static GLint win = 0;
@@ -172,127 +166,20 @@ SpecialKey(int 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, "toyball: problem compiling shader: %s\n", 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, "toyball: Unable to open shader file %s\n", filename);
- exit(1);
- }
-
- n = fread(buffer, 1, max, f);
- printf("toyball: 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);
- }
- else {
- fprintf(stderr, "Link success!\n");
- }
-}
-
-
-static void
Init(void)
{
- const char *version;
- GLint i;
-
- version = (const char *) glGetString(GL_VERSION);
- if (version[0] != '2' || version[1] != '.') {
- printf("Warning: this program expects OpenGL 2.0\n");
- /*exit(1);*/
- }
- printf("GL_RENDERER = %s\n",(const char *) glGetString(GL_RENDERER));
+ if (!ShadersSupported())
+ exit(1);
GetExtensionFuncs();
- vertShader = glCreateShader_func(GL_VERTEX_SHADER);
- ReadShader(vertShader, VertProgFile);
-
- fragShader = glCreateShader_func(GL_FRAGMENT_SHADER);
- ReadShader(fragShader, FragProgFile);
+ vertShader = CompileShaderFile(GL_VERTEX_SHADER, VertProgFile);
+ fragShader = CompileShaderFile(GL_FRAGMENT_SHADER, FragProgFile);
+ program = LinkShaders(vertShader, fragShader);
- program = glCreateProgram_func();
- glAttachShader_func(program, fragShader);
- glAttachShader_func(program, vertShader);
- glLinkProgram_func(program);
- CheckLink(program);
glUseProgram_func(program);
- assert(glIsProgram_func(program));
- assert(glIsShader_func(fragShader));
- assert(glIsShader_func(vertShader));
-
-
- 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:
- 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();
- }
- }
+ InitUniforms(program, Uniforms);
assert(glGetError() == 0);
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