GPU_ShaderBlock load_shaders(Uint32* v, Uint32* f, Uint32* p)
{
*v = load_shader(GPU_VERTEX_SHADER, "data/shaders/time_mod.vert");
if(!*v)
GPU_LogError("Failed to load vertex shader: %s\n", GPU_GetShaderMessage());
*f = load_shader(GPU_FRAGMENT_SHADER, "data/shaders/time_mod.frag");
if(!*f)
GPU_LogError("Failed to load fragment shader: %s\n", GPU_GetShaderMessage());
*p = GPU_LinkShaders(*v, *f);
if(!*p)
{
GPU_ShaderBlock b = {-1, -1, -1, -1};
GPU_LogError("Failed to link shader program: %s\n", GPU_GetShaderMessage());
return b;
}
{
GPU_ShaderBlock block = GPU_LoadShaderBlock(*p, "gpu_Vertex", "gpu_TexCoord", "gpu_Color", "gpu_ModelViewProjectionMatrix");
GPU_ActivateShaderProgram(*p, &block);
return block;
}
}
void shader_program::activate()
{
block_ = GPU_LoadShaderBlock(program_object_, "vert_vertex",
"vert_texture_pos", "vert_draw_color",
"model_view_proj");
GPU_ActivateShaderProgram(program_object_, &block_);
//NOTE: this line can be removed once we made sure that a sane overlay
// will be set before rendering anything.
set_overlay(image::get_texture("misc/blank.png"));
}
