109 lines
3.1 KiB
C
109 lines
3.1 KiB
C
/* Copyright (c) 2007 Scott Lembcke
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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#include <limits.h>
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#include <string.h>
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#include <stdio.h>
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#include "GL/glew.h"
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#include "GL/glfw.h"
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#include "chipmunk.h"
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void
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CheckGLErrors(void)
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{
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for(GLenum err = glGetError(); err; err = glGetError()){
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if(err){
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fprintf(stderr, "GLError(%s:%d) 0x%04X\n", __FILE__, __LINE__, err);
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abort();
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}
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}
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}
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//typedef GLAPIENTRY void (*GETIV)(GLuint shader, GLenum pname, GLint *params);
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//typedef GLAPIENTRY void (*GETINFOLOG)(GLuint shader, GLsizei maxLength, GLsizei *length, GLchar *infoLog);
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static cpBool
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CheckError(GLint obj, GLenum status, PFNGLGETSHADERIVPROC getiv, PFNGLGETSHADERINFOLOGPROC getInfoLog)
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{
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GLint success;
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getiv(obj, status, &success);
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if(!success){
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GLint length;
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getiv(obj, GL_INFO_LOG_LENGTH, &length);
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char *log = (char *)alloca(length);
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getInfoLog(obj, length, NULL, log);
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fprintf(stderr, "Shader compile error for 0x%04X: %s\n", status, log);
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return cpFalse;
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} else {
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return cpTrue;
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}
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}
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GLint
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CompileShader(GLenum type, const char *source)
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{
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GLint shader = glCreateShader(type);
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glShaderSource(shader, 1, &source, NULL);
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glCompileShader(shader);
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// TODO return placeholder shader instead?
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cpAssertHard(CheckError(shader, GL_COMPILE_STATUS, glGetShaderiv, glGetShaderInfoLog), "Error compiling shader");
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return shader;
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}
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GLint
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LinkProgram(GLint vshader, GLint fshader)
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{
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GLint program = glCreateProgram();
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glAttachShader(program, vshader);
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glAttachShader(program, fshader);
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glLinkProgram(program);
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// todo return placeholder program instead?
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cpAssertHard(CheckError(program, GL_LINK_STATUS, glGetProgramiv, glGetProgramInfoLog), "Error linking shader program");
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return program;
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}
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cpBool
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ValidateProgram(GLint program)
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{
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// TODO
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return cpTrue;
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}
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void
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SetAttribute(GLuint program, char *name, GLint size, GLenum gltype, GLsizei stride, GLvoid *offset)
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{
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GLint index = glGetAttribLocation(program, name);
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glEnableVertexAttribArray(index);
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glVertexAttribPointer(index, size, gltype, GL_FALSE, stride, offset);
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}
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