static void
create_primitives (cg_primitive_t *primitives[2])
{
static const Vertex vertex_data[8] =
{
/* triangle strip 1 */
{ 0, 0, 255, 0, 0, 255 },
{ 0, 100, 255, 0, 0, 255 },
{ 100, 0, 255, 0, 0, 255 },
{ 100, 100, 255, 0, 0, 255 },
/* triangle strip 2 */
{ 200, 0, 0, 0, 255, 255 },
{ 200, 100, 0, 0, 255, 255 },
{ 300, 0, 0, 0, 255, 255 },
{ 300, 100, 0, 0, 255, 255 },
};
primitives[0] = cg_primitive_new_p2c4 (test_dev,
CG_VERTICES_MODE_TRIANGLE_STRIP,
C_N_ELEMENTS (vertex_data),
vertex_data);
cg_primitive_set_n_vertices (primitives[0], 4);
primitives[1] = cg_primitive_copy (primitives[0]);
cg_primitive_set_first_vertex (primitives[1], 4);
cg_primitive_set_n_vertices (primitives[1], 4);
}
static void
paint (void)
{
cg_pipeline_t *pipeline = cg_pipeline_new (test_dev);
int width = cg_framebuffer_get_width (test_fb);
int half_width = width / 2;
int height = cg_framebuffer_get_height (test_fb);
cg_vertex_p2_t tri0_vertices[] = {
{ 0, 0 },
{ 0, height },
{ half_width, height },
};
cg_vertex_p2c4_t tri1_vertices[] = {
{ half_width, 0, 0x80, 0x80, 0x80, 0x80 },
{ half_width, height, 0x80, 0x80, 0x80, 0x80 },
{ width, height, 0x80, 0x80, 0x80, 0x80 },
};
cg_primitive_t *tri0;
cg_primitive_t *tri1;
cg_framebuffer_clear4f (test_fb, CG_BUFFER_BIT_COLOR, 0, 0, 0, 0);
tri0 = cg_primitive_new_p2 (test_dev, CG_VERTICES_MODE_TRIANGLES,
3, tri0_vertices);
tri1 = cg_primitive_new_p2c4 (test_dev, CG_VERTICES_MODE_TRIANGLES,
3, tri1_vertices);
/* Check that cogl correctly handles the case where we draw
* different primitives same pipeline and switch from using the
* opaque color associated with the pipeline and using a colour
* attribute with an alpha component which implies blending is
* required.
*
* If Cogl gets this wrong then then in all likelyhood the second
* primitive will be drawn with blending still disabled.
*/
cg_primitive_draw (tri0, test_fb, pipeline);
cg_primitive_draw (tri1, test_fb, pipeline);
test_cg_check_pixel_and_alpha (test_fb,
half_width + 5,
height - 5,
0x80808080);
}
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;
}
int
main(int argc, char **argv)
{
cg_renderer_t *renderer;
cg_device_t *dev;
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 }
};
Data data;
SDL_Event event;
renderer = cg_renderer_new();
dev = cg_device_new();
cg_renderer_set_winsys_id(renderer, CG_WINSYS_ID_SDL);
if (cg_renderer_connect(renderer, &error))
cg_device_set_renderer(dev, renderer);
else {
cg_error_free(error);
fprintf(stderr, "Failed to create device: %s\n", error->message);
return 1;
}
onscreen = cg_onscreen_new(dev, 800, 600);
data.fb = onscreen;
cg_onscreen_add_frame_callback(
onscreen, frame_cb, &data, NULL /* destroy callback */);
cg_onscreen_add_dirty_callback(
onscreen, dirty_cb, &data, NULL /* destroy callback */);
data.center_x = 0.0f;
data.center_y = 0.0f;
data.quit = false;
/* In SDL2, setting resizable only works before allocating the
* onscreen */
cg_onscreen_set_resizable(onscreen, true);
cg_onscreen_show(onscreen);
data.triangle = cg_primitive_new_p2c4(dev, CG_VERTICES_MODE_TRIANGLES, 3,
triangle_vertices);
data.pipeline = cg_pipeline_new(dev);
data.redraw_queued = false;
data.ready_to_draw = true;
while (!data.quit) {
if (!SDL_PollEvent(&event)) {
if (data.redraw_queued && data.ready_to_draw) {
redraw(&data);
data.redraw_queued = false;
data.ready_to_draw = false;
continue;
}
cg_sdl_idle(dev);
if (!SDL_WaitEvent(&event)) {
fprintf(stderr, "Error waiting for SDL events");
return 1;
}
}
handle_event(&data, &event);
cg_sdl_handle_event(dev, &event);
}
cg_object_unref(dev);
return 0;
}