/* Set up render to texture. */
void gl_renderchain_init(gl_t *gl, unsigned fbo_width, unsigned fbo_height)
{
int i;
unsigned width, height;
video_shader_ctx_scale_t scaler;
video_shader_ctx_info_t shader_info;
struct gfx_fbo_scale scale, scale_last;
if (!video_shader_driver_info(&shader_info))
return;
if (!gl || shader_info.num == 0)
return;
video_driver_get_size(&width, &height);
scaler.idx = 1;
scaler.scale = &scale;
video_shader_driver_scale(&scaler);
scaler.idx = shader_info.num;
scaler.scale = &scale_last;
video_shader_driver_scale(&scaler);
/* we always want FBO to be at least initialized on startup for consoles */
if (shader_info.num == 1 && !scale.valid)
return;
if (!gl_check_capability(GL_CAPS_FBO))
{
RARCH_ERR("Failed to locate FBO functions. Won't be able to use render-to-texture.\n");
return;
}
gl->fbo_pass = shader_info.num - 1;
if (scale_last.valid)
gl->fbo_pass++;
if (!scale.valid)
{
scale.scale_x = 1.0f;
scale.scale_y = 1.0f;
scale.type_x = scale.type_y = RARCH_SCALE_INPUT;
scale.valid = true;
}
gl->fbo_scale[0] = scale;
for (i = 1; i < gl->fbo_pass; i++)
{
scaler.idx = i + 1;
scaler.scale = &gl->fbo_scale[i];
video_shader_driver_scale(&scaler);
if (!gl->fbo_scale[i].valid)
{
gl->fbo_scale[i].scale_x = gl->fbo_scale[i].scale_y = 1.0f;
gl->fbo_scale[i].type_x = gl->fbo_scale[i].type_y =
RARCH_SCALE_INPUT;
gl->fbo_scale[i].valid = true;
}
}
gl_renderchain_recompute_pass_sizes(gl,
fbo_width, fbo_height, width, height);
for (i = 0; i < gl->fbo_pass; i++)
{
gl->fbo_rect[i].width = next_pow2(gl->fbo_rect[i].img_width);
gl->fbo_rect[i].height = next_pow2(gl->fbo_rect[i].img_height);
RARCH_LOG("[GL]: Creating FBO %d @ %ux%u\n", i,
gl->fbo_rect[i].width, gl->fbo_rect[i].height);
}
gl->fbo_feedback_enable = video_shader_driver_get_feedback_pass(
&gl->fbo_feedback_pass);
if (gl->fbo_feedback_enable && gl->fbo_feedback_pass
< (unsigned)gl->fbo_pass)
{
RARCH_LOG("[GL]: Creating feedback FBO %d @ %ux%u\n", i,
gl->fbo_rect[gl->fbo_feedback_pass].width,
gl->fbo_rect[gl->fbo_feedback_pass].height);
}
else if (gl->fbo_feedback_enable)
{
RARCH_WARN("[GL]: Tried to create feedback FBO of pass #%u, but there are only %d FBO passes. Will use input texture as feedback texture.\n",
gl->fbo_feedback_pass, gl->fbo_pass);
gl->fbo_feedback_enable = false;
}
gl_create_fbo_textures(gl);
if (!gl_create_fbo_targets(gl))
{
glDeleteTextures(gl->fbo_pass, gl->fbo_texture);
RARCH_ERR("Failed to create FBO targets. Will continue without FBO.\n");
return;
}
gl->fbo_inited = true;
}
void gl_init_fbo(gl_t *gl, unsigned width, unsigned height)
{
// No need to use FBOs.
if (!g_settings.video.render_to_texture && gl_shader_num() == 0)
return;
struct gl_fbo_scale scale, scale_last;
gl_shader_scale(1, &scale);
gl_shader_scale(gl_shader_num(), &scale_last);
// No need to use FBOs.
if (gl_shader_num() == 1 && !scale.valid && !g_settings.video.render_to_texture)
return;
if (!load_fbo_proc())
{
RARCH_ERR("Failed to locate FBO functions. Won't be able to use render-to-texture.\n");
return;
}
gl->fbo_pass = gl_shader_num() - 1;
if (scale_last.valid)
gl->fbo_pass++;
if (gl->fbo_pass <= 0)
gl->fbo_pass = 1;
if (!scale.valid)
{
scale.scale_x = g_settings.video.fbo_scale_x;
scale.scale_y = g_settings.video.fbo_scale_y;
scale.type_x = scale.type_y = RARCH_SCALE_INPUT;
scale.valid = true;
}
gl->fbo_scale[0] = scale;
for (int i = 1; i < gl->fbo_pass; i++)
{
gl_shader_scale(i + 1, &gl->fbo_scale[i]);
if (!gl->fbo_scale[i].valid)
{
gl->fbo_scale[i].scale_x = gl->fbo_scale[i].scale_y = 1.0f;
gl->fbo_scale[i].type_x = gl->fbo_scale[i].type_y = RARCH_SCALE_INPUT;
gl->fbo_scale[i].valid = true;
}
}
gl_compute_fbo_geometry(gl, width, height, gl->win_width, gl->win_height);
for (int i = 0; i < gl->fbo_pass; i++)
{
gl->fbo_rect[i].width = next_pow2(gl->fbo_rect[i].img_width);
gl->fbo_rect[i].height = next_pow2(gl->fbo_rect[i].img_height);
RARCH_LOG("Creating FBO %d @ %ux%u\n", i, gl->fbo_rect[i].width, gl->fbo_rect[i].height);
}
gl_create_fbo_textures(gl);
if (!gl_create_fbo_targets(gl))
{
glDeleteTextures(gl->fbo_pass, gl->fbo_texture);
return;
}
gl->fbo_inited = true;
}
