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98 lines
2.2 KiB
98 lines
2.2 KiB
#include <assert.h>
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#include <string.h>
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#include <stdlib.h>
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#include <stdint.h>
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#include <stdbool.h>
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#include <GLES3/gl3.h>
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#include <wlr/render.h>
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#include <wlr/render/matrix.h>
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#include "render.h"
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static bool create_shader(GLenum type, const GLchar *src, GLint len, GLuint *shader) {
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*shader = glCreateShader(type);
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glShaderSource(*shader, 1, &src, &len);
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glCompileShader(*shader);
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GLint success;
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glGetShaderiv(*shader, GL_COMPILE_STATUS, &success);
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if (success == GL_FALSE) {
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GLint loglen;
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glGetShaderiv(*shader, GL_INFO_LOG_LENGTH, &loglen);
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GLchar msg[loglen];
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glGetShaderInfoLog(*shader, loglen, &loglen, msg);
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return false;
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}
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return true;
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}
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struct wlr_shader *wlr_shader_init(const char *vertex) {
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struct wlr_shader *shader = calloc(sizeof(struct wlr_shader), 1);
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if (!create_shader(GL_VERTEX_SHADER, vertex, strlen(vertex), &shader->vert)) {
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wlr_shader_destroy(shader);
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return NULL;
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}
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return shader;
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}
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bool wlr_shader_add_format(struct wlr_shader *shader, uint32_t format,
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const char *frag) {
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assert(shader);
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struct wlr_shader *_shader = shader;
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if (_shader->valid) {
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shader = calloc(sizeof(struct wlr_shader), 1);
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shader->vert = _shader->vert;
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} else {
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while (shader->next) {
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_shader = shader;
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shader = shader->next;
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}
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}
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shader->format = format;
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GLuint _frag;
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if (!create_shader(GL_FRAGMENT_SHADER, frag, strlen(frag), &_frag)) {
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goto error;
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}
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shader->program = glCreateProgram();
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glAttachShader(shader->program, shader->vert);
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glAttachShader(shader->program, _frag);
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glLinkProgram(shader->program);
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glDeleteProgram(_frag);
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if (_shader->valid) {
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_shader->next = shader;
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}
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shader->valid = true;
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return true;
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error:
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if (_shader->valid) {
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wlr_shader_destroy(shader);
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}
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return false;
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}
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bool wlr_shader_use(struct wlr_shader *shader, uint32_t format) {
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if (shader->format == format) {
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glUseProgram(shader->program);
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return true;
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}
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while (shader->next) {
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shader = shader->next;
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if (shader->format == format) {
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glUseProgram(shader->program);
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return true;
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}
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}
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return false;
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}
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void wlr_shader_destroy(struct wlr_shader *shader) {
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while (shader) {
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struct wlr_shader *_shader = shader;
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glDeleteProgram(shader->vert);
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glDeleteProgram(shader->program);
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shader = shader->next;
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free(_shader);
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}
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}
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