diff options
Diffstat (limited to 'progs/util')
| -rw-r--r-- | progs/util/shaderutil.c | 151 | ||||
| -rw-r--r-- | progs/util/shaderutil.h | 26 |
2 files changed, 144 insertions, 33 deletions
diff --git a/progs/util/shaderutil.c b/progs/util/shaderutil.c index 13b68d90e0b..489e71cc30c 100644 --- a/progs/util/shaderutil.c +++ b/progs/util/shaderutil.c @@ -9,21 +9,12 @@ #include <assert.h> #include <stdio.h> #include <stdlib.h> +#include <string.h> #include <GL/glew.h> #include <GL/glut.h> #include "shaderutil.h" -static void -Init(void) -{ - static GLboolean firstCall = GL_TRUE; - if (firstCall) { - firstCall = GL_FALSE; - } -} - - GLboolean ShadersSupported(void) { @@ -47,8 +38,6 @@ CompileShaderText(GLenum shaderType, const char *text) GLuint shader; GLint stat; - Init(); - shader = glCreateShader(shaderType); glShaderSource(shader, 1, (const GLchar **) &text, NULL); glCompileShader(shader); @@ -79,9 +68,6 @@ CompileShaderFile(GLenum shaderType, const char *filename) GLuint shader; FILE *f; - Init(); - - f = fopen(filename, "r"); if (!f) { fprintf(stderr, "Unable to open shader file %s\n", filename); @@ -136,7 +122,7 @@ LinkShaders(GLuint vertShader, GLuint fragShader) void -InitUniforms(GLuint program, struct uniform_info uniforms[]) +SetUniformValues(GLuint program, struct uniform_info uniforms[]) { GLuint i; @@ -144,28 +130,133 @@ InitUniforms(GLuint program, struct uniform_info uniforms[]) uniforms[i].location = glGetUniformLocation(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(uniforms[i].location, - (GLint) uniforms[i].value[0]); - else - glUniform1fv(uniforms[i].location, 1, uniforms[i].value); + switch (uniforms[i].type) { + case GL_INT: + case GL_SAMPLER_1D: + case GL_SAMPLER_2D: + case GL_SAMPLER_3D: + case GL_SAMPLER_CUBE: + case GL_SAMPLER_2D_RECT_ARB: + glUniform1i(uniforms[i].location, + (GLint) uniforms[i].value[0]); + break; + case GL_FLOAT: + glUniform1fv(uniforms[i].location, 1, uniforms[i].value); break; - case 2: + case GL_FLOAT_VEC2: glUniform2fv(uniforms[i].location, 1, uniforms[i].value); break; - case 3: + case GL_FLOAT_VEC3: glUniform3fv(uniforms[i].location, 1, uniforms[i].value); break; - case 4: + case GL_FLOAT_VEC4: glUniform4fv(uniforms[i].location, 1, uniforms[i].value); break; default: - abort(); + if (strncmp(uniforms[i].name, "gl_", 3) == 0) { + /* built-in uniform: ignore */ + } + else { + fprintf(stderr, + "Unexpected uniform data type in SetUniformValues\n"); + abort(); + } } } } + + +/** Get list of uniforms used in the program */ +GLuint +GetUniforms(GLuint program, struct uniform_info uniforms[]) +{ + GLint n, max, i; + + glGetProgramiv(program, GL_ACTIVE_UNIFORMS, &n); + glGetProgramiv(program, GL_ACTIVE_UNIFORM_MAX_LENGTH, &max); + + for (i = 0; i < n; i++) { + GLint size, len; + GLenum type; + char name[100]; + + glGetActiveUniform(program, i, 100, &len, &size, &type, name); + + uniforms[i].name = strdup(name); + uniforms[i].size = size; + uniforms[i].type = type; + uniforms[i].location = glGetUniformLocation(program, name); + } + + uniforms[i].name = NULL; /* end of list */ + + return n; +} + + +void +PrintUniforms(const struct uniform_info uniforms[]) +{ + GLint i; + + printf("Uniforms:\n"); + + for (i = 0; uniforms[i].name; i++) { + printf(" %d: %s size=%d type=0x%x loc=%d value=%g, %g, %g, %g\n", + i, + uniforms[i].name, + uniforms[i].size, + uniforms[i].type, + uniforms[i].location, + uniforms[i].value[0], + uniforms[i].value[1], + uniforms[i].value[2], + uniforms[i].value[3]); + } +} + + +/** Get list of attribs used in the program */ +GLuint +GetAttribs(GLuint program, struct attrib_info attribs[]) +{ + GLint n, max, i; + + glGetProgramiv(program, GL_ACTIVE_ATTRIBUTES, &n); + glGetProgramiv(program, GL_ACTIVE_ATTRIBUTE_MAX_LENGTH, &max); + + for (i = 0; i < n; i++) { + GLint size, len; + GLenum type; + char name[100]; + + glGetActiveAttrib(program, i, 100, &len, &size, &type, name); + + attribs[i].name = strdup(name); + attribs[i].size = size; + attribs[i].type = type; + attribs[i].location = glGetAttribLocation(program, name); + } + + attribs[i].name = NULL; /* end of list */ + + return n; +} + + +void +PrintAttribs(const struct attrib_info attribs[]) +{ + GLint i; + + printf("Attribs:\n"); + + for (i = 0; attribs[i].name; i++) { + printf(" %d: %s size=%d type=0x%x loc=%d\n", + i, + attribs[i].name, + attribs[i].size, + attribs[i].type, + attribs[i].location); + } +} diff --git a/progs/util/shaderutil.h b/progs/util/shaderutil.h index cfb8c1f3b06..0a6be026759 100644 --- a/progs/util/shaderutil.h +++ b/progs/util/shaderutil.h @@ -6,8 +6,8 @@ struct uniform_info { const char *name; - GLuint size; - GLenum type; /**< GL_FLOAT or GL_INT */ + GLuint size; /**< number of value[] elements: 1, 2, 3 or 4 */ + GLenum type; /**< GL_FLOAT, GL_FLOAT_VEC4, GL_INT, etc */ GLfloat value[4]; GLint location; /**< filled in by InitUniforms() */ }; @@ -15,6 +15,15 @@ struct uniform_info #define END_OF_UNIFORMS { NULL, 0, GL_NONE, { 0, 0, 0, 0 }, -1 } +struct attrib_info +{ + const char *name; + GLuint size; /**< number of value[] elements: 1, 2, 3 or 4 */ + GLenum type; /**< GL_FLOAT, GL_FLOAT_VEC4, GL_INT, etc */ + GLint location; +}; + + extern GLboolean ShadersSupported(void); @@ -28,7 +37,18 @@ extern GLuint LinkShaders(GLuint vertShader, GLuint fragShader); extern void -InitUniforms(GLuint program, struct uniform_info uniforms[]); +SetUniformValues(GLuint program, struct uniform_info uniforms[]); + +extern GLuint +GetUniforms(GLuint program, struct uniform_info uniforms[]); + +extern void +PrintUniforms(const struct uniform_info uniforms[]); +extern GLuint +GetAttribs(GLuint program, struct attrib_info attribs[]); + +extern void +PrintAttribs(const struct attrib_info attribs[]); #endif /* SHADER_UTIL_H */ |