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);
}
}
void
shader_init() {
if (RS) return;
struct render_state * rs = (struct render_state *) malloc(sizeof(*rs));
memset(rs, 0 , sizeof(*rs));
struct render_init_args RA;
// todo: config these args
RA.max_buffer = 128;
RA.max_layout = 4;
RA.max_target = 128;
RA.max_texture = 256;
RA.max_shader = MAX_PROGRAM;
int rsz = render_size(&RA);
rs->R = (struct render *)malloc(rsz);
rs->R = render_init(&RA, rs->R, rsz);
texture_initrender(rs->R);
screen_initrender(rs->R);
label_initrender(rs->R);
lsprite_initrender(rs->R);
renderbuffer_initrender(rs->R);
rs->current_program = -1;
rs->blendchange = 0;
render_setblend(rs->R, BLEND_ONE, BLEND_ONE_MINUS_SRC_ALPHA);
uint16_t idxs[6 * MAX_COMMBINE];
int i;
for (i=0;i<MAX_COMMBINE;i++) {
idxs[i*6] = i*4;
idxs[i*6+1] = i*4+1;
idxs[i*6+2] = i*4+2;
idxs[i*6+3] = i*4;
idxs[i*6+4] = i*4+2;
idxs[i*6+5] = i*4+3;
}
rs->index_buffer = render_buffer_create(rs->R, INDEXBUFFER, idxs, 6 * MAX_COMMBINE, sizeof(uint16_t));
rs->vertex_buffer = render_buffer_create(rs->R, VERTEXBUFFER, NULL, 4 * MAX_COMMBINE, sizeof(struct vertex));
struct vertex_attrib va[4] = {
{ "position", 0, 2, sizeof(float), BUFFER_OFFSET(vp.vx) },
{ "texcoord", 0, 2, sizeof(uint16_t), BUFFER_OFFSET(vp.tx) },
{ "color", 0, 4, sizeof(uint8_t), BUFFER_OFFSET(rgba) },
{ "additive", 0, 4, sizeof(uint8_t), BUFFER_OFFSET(add) },
};
rs->layout = render_register_vertexlayout(rs->R, sizeof(va)/sizeof(va[0]), va);
render_set(rs->R, VERTEXLAYOUT, rs->layout, 0);
render_set(rs->R, INDEXBUFFER, rs->index_buffer, 0);
render_set(rs->R, VERTEXBUFFER, rs->vertex_buffer, 0);
RS = rs;
}
void
shader_reset() {
struct render_state *rs = RS;
render_state_reset(rs->R);
render_setblend(rs->R, BLEND_ONE, BLEND_ONE_MINUS_SRC_ALPHA);
if (RS->current_program != -1) {
render_shader_bind(rs->R, RS->program[RS->current_program].prog);
}
render_set(rs->R, VERTEXLAYOUT, rs->layout, 0);
render_set(rs->R, TEXTURE, RS->tex[0], 0);
render_set(rs->R, INDEXBUFFER, RS->index_buffer,0);
render_set(rs->R, VERTEXBUFFER, RS->vertex_buffer,0);
}
