585879281f
This helper converts an GL error into a string for easier debugging. Signed-off-by: David Herrmann <dh.herrmann@googlemail.com>
91 lines
3.1 KiB
C
91 lines
3.1 KiB
C
/*
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* kmscon - OpenGL Helpers
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*
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* Copyright (c) 2011-2012 David Herrmann <dh.herrmann@googlemail.com>
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* Copyright (c) 2011 University of Tuebingen
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files
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* (the "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sublicense, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice shall be included
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* in 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
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* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
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* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
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* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
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* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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/*
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* OpenGL Helpers
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* This file provides several helper functions that are commonly used when
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* working with OpenGL.
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*/
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#ifndef GL_H_INCLUDED
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#define GL_H_INCLUDED
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#include <GLES2/gl2.h>
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#include <GLES2/gl2ext.h>
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#include <stdbool.h>
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#include <stdlib.h>
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#include <stddef.h>
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#include "static_llog.h"
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/*
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* Math Helpers
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* The gl_m4 type is a 4x4 matrix of floats. The gl_m4_stack is a stack of m4
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* matrices where you can only access the top-most member.
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*/
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struct gl_m4_stack;
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void gl_m4_identity(float *m);
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void gl_m4_copy(float *dest, const float *src);
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void gl_m4_mult_dest(float *dest, const float *n, const float *m);
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void gl_m4_mult(float *n, const float *m);
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void gl_m4_translate(float *m, float x, float y, float z);
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void gl_m4_scale(float *m, float x, float y, float z);
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void gl_m4_transpose_dest(float *dest, const float *src);
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void gl_m4_transpose(float *m);
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int gl_m4_stack_new(struct gl_m4_stack **out);
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void gl_m4_stack_free(struct gl_m4_stack *stack);
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float *gl_m4_stack_push(struct gl_m4_stack *stack);
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float *gl_m4_stack_pop(struct gl_m4_stack *stack);
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float *gl_m4_stack_tip(struct gl_m4_stack *stack);
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/*
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* Shader Helpers
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* These helpers load, compile and link shaders and allow easy attribute/uniform
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* access.
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*/
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struct gl_shader;
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int gl_shader_new(struct gl_shader **out, const char *vert, const char *frag,
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char **attr, size_t attr_count, llog_submit_t llog);
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void gl_shader_ref(struct gl_shader *shader);
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void gl_shader_unref(struct gl_shader *shader);
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GLuint gl_shader_get_uniform(struct gl_shader *shader, const char *name);
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void gl_shader_use(struct gl_shader *shader);
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void gl_tex_new(GLuint *tex, size_t num);
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void gl_tex_free(GLuint *tex, size_t num);
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void gl_tex_load(GLuint tex, unsigned int width, unsigned int stride,
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unsigned int height, uint8_t *buf);
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void gl_clear_error();
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bool gl_has_error(struct gl_shader *shader);
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const char *gl_err_to_str(GLenum err);
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#endif /* GL_H_INCLUDED */
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