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#include <EGL/egl.h>
#include <stdio.h>
#include <stdlib.h>
#include <wlr/util/log.h>
#include "render/fx_renderer/fx_renderer.h"
#include "render/fx_renderer/shaders.h"
// shaders
#include "common_vert_src.h"
#include "quad_frag_src.h"
#include "tex_frag_src.h"
#include "stencil_mask_frag_src.h"
#include "box_shadow_frag_src.h"
GLuint compile_shader(GLuint type, const GLchar *src) {
GLuint shader = glCreateShader(type);
glShaderSource(shader, 1, &src, NULL);
glCompileShader(shader);
GLint ok;
glGetShaderiv(shader, GL_COMPILE_STATUS, &ok);
if (ok == GL_FALSE) {
wlr_log(WLR_ERROR, "Failed to compile shader");
glDeleteShader(shader);
shader = 0;
}
return shader;
}
GLuint link_program(const GLchar *frag_src) {
const GLchar *vert_src = common_vert_src;
GLuint vert = compile_shader(GL_VERTEX_SHADER, vert_src);
if (!vert) {
goto error;
}
GLuint frag = compile_shader(GL_FRAGMENT_SHADER, frag_src);
if (!frag) {
glDeleteShader(vert);
goto error;
}
GLuint prog = glCreateProgram();
glAttachShader(prog, vert);
glAttachShader(prog, frag);
glLinkProgram(prog);
glDetachShader(prog, vert);
glDetachShader(prog, frag);
glDeleteShader(vert);
glDeleteShader(frag);
GLint ok;
glGetProgramiv(prog, GL_LINK_STATUS, &ok);
if (ok == GL_FALSE) {
wlr_log(WLR_ERROR, "Failed to link shader");
glDeleteProgram(prog);
goto error;
}
return prog;
error:
return 0;
}
bool check_gl_ext(const char *exts, const char *ext) {
size_t extlen = strlen(ext);
const char *end = exts + strlen(exts);
while (exts < end) {
if (exts[0] == ' ') {
exts++;
continue;
}
size_t n = strcspn(exts, " ");
if (n == extlen && strncmp(ext, exts, n) == 0) {
return true;
}
exts += n;
}
return false;
}
void load_gl_proc(void *proc_ptr, const char *name) {
void *proc = (void *)eglGetProcAddress(name);
if (proc == NULL) {
wlr_log(WLR_ERROR, "FX RENDERER: eglGetProcAddress(%s) failed", name);
abort();
}
*(void **)proc_ptr = proc;
}
// Shaders
static bool link_quad_program(struct quad_shader *shader) {
GLuint prog;
shader->program = prog = link_program(quad_frag_src);
if (!shader->program) {
return false;
}
shader->proj = glGetUniformLocation(prog, "proj");
shader->color = glGetUniformLocation(prog, "color");
shader->pos_attrib = glGetAttribLocation(prog, "pos");
return true;
}
static bool link_tex_program(struct tex_shader *shader,
enum fx_tex_shader_source source) {
GLchar frag_src[2048];
snprintf(frag_src, sizeof(frag_src),
"#define SOURCE %d\n%s", source, tex_frag_src);
GLuint prog;
shader->program = prog = link_program(frag_src);
if (!shader->program) {
return false;
}
shader->proj = glGetUniformLocation(prog, "proj");
shader->tex = glGetUniformLocation(prog, "tex");
shader->alpha = glGetUniformLocation(prog, "alpha");
shader->pos_attrib = glGetAttribLocation(prog, "pos");
shader->tex_proj = glGetUniformLocation(prog, "tex_proj");
shader->size = glGetUniformLocation(prog, "size");
shader->position = glGetUniformLocation(prog, "position");
shader->radius = glGetUniformLocation(prog, "radius");
return true;
}
static bool link_stencil_mask_program(struct stencil_mask_shader *shader) {
GLuint prog;
shader->program = prog = link_program(stencil_mask_frag_src);
if (!shader->program) {
return false;
}
shader->proj = glGetUniformLocation(prog, "proj");
shader->color = glGetUniformLocation(prog, "color");
shader->pos_attrib = glGetAttribLocation(prog, "pos");
shader->tex_proj = glGetUniformLocation(prog, "tex_proj");
shader->position = glGetUniformLocation(prog, "position");
shader->half_size = glGetUniformLocation(prog, "half_size");
shader->radius = glGetUniformLocation(prog, "radius");
return true;
}
static bool link_box_shadow_program(struct box_shadow_shader *shader) {
GLuint prog;
shader->program = prog = link_program(box_shadow_frag_src);
if (!shader->program) {
return false;
}
shader->proj = glGetUniformLocation(prog, "proj");
shader->color = glGetUniformLocation(prog, "color");
shader->pos_attrib = glGetAttribLocation(prog, "pos");
shader->tex_proj = glGetUniformLocation(prog, "tex_proj");
shader->position = glGetUniformLocation(prog, "position");
shader->size = glGetUniformLocation(prog, "size");
shader->blur_sigma = glGetUniformLocation(prog, "blur_sigma");
shader->corner_radius = glGetUniformLocation(prog, "corner_radius");
return true;
}
bool link_shaders(struct fx_renderer *renderer) {
// quad fragment shader
if (!link_quad_program(&renderer->shaders.quad)) {
wlr_log(WLR_ERROR, "Could not link quad shader");
return false;
}
// fragment shaders
if (!link_tex_program(&renderer->shaders.tex_rgba, SHADER_SOURCE_TEXTURE_RGBA)) {
wlr_log(WLR_ERROR, "Could not link tex_RGBA shader");
return false;
}
if (!link_tex_program(&renderer->shaders.tex_rgbx, SHADER_SOURCE_TEXTURE_RGBX)) {
wlr_log(WLR_ERROR, "Could not link tex_RGBX shader");
return false;
}
if (!link_tex_program(&renderer->shaders.tex_ext, SHADER_SOURCE_TEXTURE_EXTERNAL)) {
wlr_log(WLR_ERROR, "Could not link tex_EXTERNAL shader");
return false;
}
// TODO: Fix the shader compilation errors
// // stencil mask shader
// if (!link_stencil_mask_program(&renderer->shaders.stencil_mask)) {
// return false;
// }
// // box shadow shader
// if (!link_box_shadow_program(&renderer->shaders.box_shadow)) {
// return false;
// }
return true;
}
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