void
shader_blend(int m1, int m2) {
if (m1 != BLEND_GL_ONE || m2 != BLEND_GL_ONE_MINUS_SRC_ALPHA) {
rs_commit();
RS->blendchange = 1;
enum BLEND_FORMAT src = blend_mode(m1);
enum BLEND_FORMAT dst = blend_mode(m2);
render_setblend(RS->R, src, dst);
}
}
manager::manager(shader_ptr shader)
{
// Reset errors, so we can track errors that happened here.
glGetError();
GLint blend_src_mode;
GLint blend_dst_mode;
// Save current blend mode
glGetIntegerv(GL_BLEND_SRC, &blend_src_mode);
glGetIntegerv(GL_BLEND_DST, &blend_dst_mode);
blend_stack.push(blend_mode(blend_src_mode, blend_dst_mode, glIsEnabled(GL_BLEND) != 0));
GLint atu;
glGetIntegerv(GL_ACTIVE_TEXTURE, &atu);
active_texture_unit.push(atu);
if(shader == NULL || active_shader_program == shader) {
return;
}
if(active_shader_program != shader) {
shader_stack.push(active_shader_program);
active_shader_program = shader;
}
ASSERT_LOG(active_shader_program != NULL, "Active shader was NULL");
active_shader_program->prepare_draw();
GLenum err = glGetError();
ASSERT_LOG(err == GL_NONE, "Error in shader code: " << shader->name() << " : 0x" << std::hex << err);
}
void gen_heightmap()
{
use_shader(shader_generate);
uniform("time", get_elapsed_time());
blend_mode(false);
depth_test(false);
depth_write(false);
glBindFramebuffer(GL_FRAMEBUFFER, rt_heightmap.fbo);
glViewport(0, 0, rt_heightmap.width, rt_heightmap.height);
clearc(0x00000000);
mesh_quad.draw();
glBindFramebuffer(GL_FRAMEBUFFER, 0);
glViewport(0, 0, window_width, window_height);
}