int
main(int argc, char **argv)
{
Data data;
cg_onscreen_t *onscreen;
cg_error_t *error = NULL;
cg_vertex_p2c4_t triangle_vertices[] = {
{ 0, 0.7, 0xff, 0x00, 0x00, 0xff },
{ -0.7, -0.7, 0x00, 0xff, 0x00, 0xff },
{ 0.7, -0.7, 0x00, 0x00, 0xff, 0xff }
};
cg_renderer_t *renderer;
cg_display_t *display;
uv_loop_t *loop = uv_default_loop();
renderer = cg_renderer_new();
cg_renderer_add_constraint(renderer,
CG_RENDERER_CONSTRAINT_SUPPORTS_CG_GLES2);
if (!cg_renderer_connect(renderer, &error)) {
c_error("%s", error->message);
exit(1);
}
display = cg_display_new(renderer, NULL);
data.dev = cg_device_new();
cg_device_set_display(data.dev, display);
if (!cg_device_connect(data.dev, &error)) {
c_error("%s", error->message);
exit(1);
}
onscreen = cg_onscreen_new(data.dev, 640, 480);
cg_onscreen_show(onscreen);
data.fb = onscreen;
/* Prepare onscreen primitive */
data.triangle = cg_primitive_new_p2c4(
data.dev, CG_VERTICES_MODE_TRIANGLES, 3, triangle_vertices);
data.pipeline = cg_pipeline_new(data.dev);
data.offscreen_texture = cg_texture_2d_new_with_size(
data.dev, OFFSCREEN_WIDTH, OFFSCREEN_HEIGHT);
data.offscreen = cg_offscreen_new_with_texture(data.offscreen_texture);
data.gles2_ctx = cg_gles2_context_new(data.dev, &error);
if (!data.gles2_ctx) {
c_error("Failed to create GLES2 context: %s\n", error->message);
}
data.gles2_vtable = cg_gles2_context_get_vtable(data.gles2_ctx);
/* Draw scene with GLES2 */
if (!cg_push_gles2_context(
data.dev, data.gles2_ctx, data.fb, data.fb, &error)) {
c_error("Failed to push gles2 context: %s\n", error->message);
}
cg_pop_gles2_context(data.dev);
cg_onscreen_add_frame_callback(
CG_ONSCREEN(data.fb), frame_event_cb, &data, NULL); /* destroy notify */
uv_idle_init(loop, &data.idle);
data.idle.data = &data;
uv_idle_start(&data.idle, paint_cb);
cg_uv_set_mainloop(data.dev, loop);
uv_run(loop, UV_RUN_DEFAULT);
return 0;
}
bool
cg_device_connect(cg_device_t *dev, cg_error_t **error)
{
uint8_t white_pixel[] = { 0xff, 0xff, 0xff, 0xff };
const cg_winsys_vtable_t *winsys;
int i;
cg_error_t *internal_error = NULL;
if (dev->connected)
return true;
/* Mark as connected now to avoid recursion issues,
* but revert in error paths */
dev->connected = true;
if (!dev->renderer) {
cg_renderer_t *renderer = cg_renderer_new();
if (!cg_renderer_connect(renderer, error)) {
cg_object_unref(renderer);
dev->connected = false;
return false;
}
cg_device_set_renderer(dev, renderer);
}
if (!dev->display) {
cg_display_t *display = cg_display_new(dev->renderer, NULL);
if (!cg_display_setup(display, error)) {
cg_object_unref(display);
dev->connected = false;
return false;
}
cg_device_set_display(dev, display);
}
/* This is duplicated data, but it's much more convenient to have
the driver attached to the context and the value is accessed a
lot throughout CGlib */
dev->driver = dev->renderer->driver;
/* Again this is duplicated data, but it convenient to be able
* access these from the context. */
dev->driver_vtable = dev->renderer->driver_vtable;
dev->texture_driver = dev->renderer->texture_driver;
for (i = 0; i < C_N_ELEMENTS(dev->private_features); i++)
dev->private_features[i] |= dev->renderer->private_features[i];
winsys = _cg_device_get_winsys(dev);
if (!winsys->device_init(dev, error)) {
dev->connected = false;
return false;
}
dev->attribute_name_states_hash =
c_hash_table_new_full(c_str_hash, c_str_equal, c_free, c_free);
dev->attribute_name_index_map = NULL;
dev->n_attribute_names = 0;
/* The "cg_color_in" attribute needs a deterministic name_index
* so we make sure it's the first attribute name we register */
_cg_attribute_register_attribute_name(dev, "cg_color_in");
dev->uniform_names =
c_ptr_array_new_with_free_func((c_destroy_func_t)c_free);
dev->uniform_name_hash = c_hash_table_new(c_str_hash, c_str_equal);
dev->n_uniform_names = 0;
/* Initialise the driver specific state */
_cg_init_feature_overrides(dev);
/* XXX: ONGOING BUG: Intel viewport scissor
*
* Intel gen6 drivers don't currently correctly handle offset
* viewports, since primitives aren't clipped within the bounds of
* the viewport. To workaround this we push our own clip for the
* viewport that will use scissoring to ensure we clip as expected.
*
* TODO: file a bug upstream!
*/
if (dev->gpu.driver_package == CG_GPU_INFO_DRIVER_PACKAGE_MESA &&
dev->gpu.architecture == CG_GPU_INFO_ARCHITECTURE_SANDYBRIDGE &&
!getenv("CG_DISABLE_INTEL_VIEWPORT_SCISSORT_WORKAROUND"))
dev->needs_viewport_scissor_workaround = true;
else
dev->needs_viewport_scissor_workaround = false;
dev->sampler_cache = _cg_sampler_cache_new(dev);
_cg_pipeline_init_default_pipeline();
_cg_pipeline_init_default_layers();
_cg_pipeline_init_state_hash_functions();
_cg_pipeline_init_layer_state_hash_functions();
dev->current_clip_stack_valid = false;
dev->current_clip_stack = NULL;
c_matrix_init_identity(&dev->identity_matrix);
c_matrix_init_identity(&dev->y_flip_matrix);
c_matrix_scale(&dev->y_flip_matrix, 1, -1, 1);
dev->texture_units =
c_array_new(false, false, sizeof(cg_texture_unit_t));
if (_cg_has_private_feature(dev, CG_PRIVATE_FEATURE_ANY_GL)) {
/* See cg-pipeline.c for more details about why we leave texture unit
* 1
* active by default... */
dev->active_texture_unit = 1;
GE(dev, glActiveTexture(GL_TEXTURE1));
}
dev->opaque_color_pipeline = cg_pipeline_new(dev);
dev->codegen_header_buffer = c_string_new("");
dev->codegen_source_buffer = c_string_new("");
dev->default_gl_texture_2d_tex = NULL;
dev->default_gl_texture_3d_tex = NULL;
dev->framebuffers = NULL;
dev->current_draw_buffer = NULL;
dev->current_read_buffer = NULL;
dev->current_draw_buffer_state_flushed = 0;
dev->current_draw_buffer_changes = CG_FRAMEBUFFER_STATE_ALL;
c_list_init(&dev->onscreen_events_queue);
c_list_init(&dev->onscreen_dirty_queue);
c_queue_init(&dev->gles2_context_stack);
dev->current_pipeline = NULL;
dev->current_pipeline_changes_since_flush = 0;
dev->current_pipeline_with_color_attrib = false;
_cg_bitmask_init(&dev->enabled_custom_attributes);
_cg_bitmask_init(&dev->enable_custom_attributes_tmp);
_cg_bitmask_init(&dev->changed_bits_tmp);
dev->max_texture_units = -1;
dev->max_activateable_texture_units = -1;
dev->current_gl_program = 0;
dev->current_gl_dither_enabled = true;
dev->current_gl_color_mask = CG_COLOR_MASK_ALL;
dev->gl_blend_enable_cache = false;
dev->depth_test_enabled_cache = false;
dev->depth_test_function_cache = CG_DEPTH_TEST_FUNCTION_LESS;
dev->depth_writing_enabled_cache = true;
dev->depth_range_near_cache = 0;
dev->depth_range_far_cache = 1;
dev->pipeline_cache = _cg_pipeline_cache_new();
for (i = 0; i < CG_BUFFER_BIND_TARGET_COUNT; i++)
dev->current_buffer[i] = NULL;
dev->stencil_pipeline = cg_pipeline_new(dev);
dev->rectangle_byte_indices = NULL;
dev->rectangle_short_indices = NULL;
dev->rectangle_short_indices_len = 0;
dev->texture_download_pipeline = NULL;
dev->blit_texture_pipeline = NULL;
#if defined(CG_HAS_GL_SUPPORT)
if ((dev->driver == CG_DRIVER_GL3)) {
GLuint vertex_array;
/* In a forward compatible context, GL 3 doesn't support rendering
* using the default vertex array object. CGlib doesn't use vertex
* array objects yet so for now we just create a dummy array
* object that we will use as our own default object. Eventually
* it could be good to attach the vertex array objects to
* cg_primitive_ts */
dev->glGenVertexArrays(1, &vertex_array);
dev->glBindVertexArray(vertex_array);
}
#endif
dev->current_modelview_entry = NULL;
dev->current_projection_entry = NULL;
_cg_matrix_entry_identity_init(&dev->identity_entry);
_cg_matrix_entry_cache_init(&dev->builtin_flushed_projection);
_cg_matrix_entry_cache_init(&dev->builtin_flushed_modelview);
/* Create default textures used for fall backs */
dev->default_gl_texture_2d_tex =
cg_texture_2d_new_from_data(dev,
1,
1,
CG_PIXEL_FORMAT_RGBA_8888_PRE,
0, /* rowstride */
white_pixel,
NULL); /* abort on error */
/* If 3D or rectangle textures aren't supported then these will
* return errors that we can simply ignore. */
internal_error = NULL;
dev->default_gl_texture_3d_tex =
cg_texture_3d_new_from_data(dev,
1,
1,
1, /* width, height, depth */
CG_PIXEL_FORMAT_RGBA_8888_PRE,
0, /* rowstride */
0, /* image stride */
white_pixel,
&internal_error);
if (internal_error)
cg_error_free(internal_error);
dev->buffer_map_fallback_array = c_byte_array_new();
dev->buffer_map_fallback_in_use = false;
c_list_init(&dev->fences);
dev->atlas_set = cg_atlas_set_new(dev);
cg_atlas_set_set_components(dev->atlas_set, CG_TEXTURE_COMPONENTS_RGBA);
cg_atlas_set_set_premultiplied(dev->atlas_set, false);
cg_atlas_set_add_atlas_callback(dev->atlas_set,
_cg_atlas_texture_atlas_event_handler,
NULL, /* user data */
NULL); /* destroy */
return true;
}