/**
* Compiles a new shader, and creates an opengl_shader_t that will be put into the GL_shader vector
* if compilation is successful.
*
* @param sdr Identifier defined with the program we wish to compile
* @param flags Combination of SDR_* flags
* @param replacement_idx The index of the shader this replaces. If -1, the newly compiled shader will be appended to the GL_shader vector
* or inserted at the first available empty slot
*/
int opengl_compile_shader(shader_type sdr, uint flags)
{
GR_DEBUG_SCOPE("Creating new shader");
int sdr_index = -1;
int empty_idx;
opengl_shader_t new_shader;
Assert(sdr < NUM_SHADER_TYPES);
opengl_compile_shader_actual(sdr, flags, new_shader);
opengl_shader_set_current();
// add it to our list of embedded shaders
// see if we have empty shader slots
empty_idx = -1;
for (int i = 0; i < (int)GL_shader.size(); ++i) {
if (GL_shader[i].shader == NUM_SHADER_TYPES) {
empty_idx = i;
break;
}
}
// then insert it at an empty slot or at the end
if ( empty_idx >= 0 ) {
GL_shader[empty_idx] = std::move(new_shader);
sdr_index = empty_idx;
} else {
sdr_index = (int)GL_shader.size();
GL_shader.push_back(std::move(new_shader));
}
return sdr_index;
}
void gr_opengl_recompile_all_shaders(const std::function<void(size_t, size_t)>& progress_callback)
{
for (auto sdr = GL_shader.begin(); sdr != GL_shader.end(); ++sdr)
{
if (progress_callback)
progress_callback(std::distance(GL_shader.begin(), sdr), GL_shader.size());
sdr->program.reset();
opengl_compile_shader_actual(sdr->shader, sdr->flags, *sdr);
}
}
