static void
_rut_camera_flush_transforms (RutCamera *camera)
{
const CoglMatrix *projection;
CoglFramebuffer *fb = camera->fb;
CameraFlushState *state;
/* While a camera is in a suspended state then we don't expect to
* _flush() and use that camera before it is restored. */
g_return_if_fail (camera->suspended == FALSE);
state = cogl_object_get_user_data (COGL_OBJECT (fb), &fb_camera_key);
if (!state)
{
state = g_slice_new (CameraFlushState);
cogl_object_set_user_data (COGL_OBJECT (fb),
&fb_camera_key,
state,
free_camera_flush_state);
}
else if (state->current_camera == camera &&
camera->transform_age == state->transform_age)
goto done;
if (camera->in_frame)
{
g_warning ("Un-balanced rut_camera_flush/_end calls: "
"repeat _flush() calls before _end()");
}
cogl_framebuffer_set_viewport (fb,
camera->viewport[0],
camera->viewport[1],
camera->viewport[2],
camera->viewport[3]);
projection = rut_camera_get_projection (camera);
cogl_framebuffer_set_projection_matrix (fb, projection);
cogl_framebuffer_set_modelview_matrix (fb, &camera->view);
state->current_camera = camera;
state->transform_age = camera->transform_age;
done:
camera->in_frame = TRUE;
}
static void
setup_orthographic_modelview (void)
{
CoglMatrix matrix;
int fb_width = cogl_framebuffer_get_width (test_fb);
int fb_height = cogl_framebuffer_get_height (test_fb);
/* Set up a non-identity modelview matrix. When the journal is
* flushed it will usually flush the identity matrix. Using the
* non-default matrix ensures that we test that Cogl restores the
* matrix we asked for. The matrix sets up an orthographic transform
* in the modelview matrix */
cogl_matrix_init_identity (&matrix);
cogl_matrix_orthographic (&matrix,
0.0f, 0.0f, /* x_1 y_1 */
fb_width,
fb_height,
-1.0f, /* nearval */
1.0f /* farval */);
cogl_framebuffer_set_modelview_matrix (test_fb, &matrix);
}
int
main (int argc, char **argv)
{
CoglContext *ctx;
CoglOnscreen *onscreen;
CoglFramebuffer *fb;
GError *error = NULL;
Data data;
PangoRectangle hello_label_size;
float fovy, aspect, z_near, z_2d, z_far;
CoglDepthState depth_state;
CoglBool has_swap_notify;
ctx = cogl_context_new (NULL, &error);
if (!ctx) {
fprintf (stderr, "Failed to create context: %s\n", error->message);
return 1;
}
onscreen = cogl_onscreen_new (ctx, 640, 480);
fb = COGL_FRAMEBUFFER (onscreen);
data.fb = fb;
data.framebuffer_width = cogl_framebuffer_get_width (fb);
data.framebuffer_height = cogl_framebuffer_get_height (fb);
data.timer = g_timer_new ();
cogl_onscreen_show (onscreen);
cogl_framebuffer_set_viewport (fb,
0, 0,
data.framebuffer_width,
data.framebuffer_height);
fovy = 60; /* y-axis field of view */
aspect = (float)data.framebuffer_width/(float)data.framebuffer_height;
z_near = 0.1; /* distance to near clipping plane */
z_2d = 1000; /* position to 2d plane */
z_far = 2000; /* distance to far clipping plane */
cogl_framebuffer_perspective (fb, fovy, aspect, z_near, z_far);
/* Since the pango renderer emits geometry in pixel/device coordinates
* and the anti aliasing is implemented with the assumption that the
* geometry *really* does end up pixel aligned, we setup a modelview
* matrix so that for geometry in the plane z = 0 we exactly map x
* coordinates in the range [0,stage_width] and y coordinates in the
* range [0,stage_height] to the framebuffer extents with (0,0) being
* the top left.
*
* This is roughly what Clutter does for a ClutterStage, but this
* demonstrates how it is done manually using Cogl.
*/
cogl_matrix_init_identity (&data.view);
cogl_matrix_view_2d_in_perspective (&data.view, fovy, aspect, z_near, z_2d,
data.framebuffer_width,
data.framebuffer_height);
cogl_framebuffer_set_modelview_matrix (fb, &data.view);
/* Initialize some convenient constants */
cogl_matrix_init_identity (&identity);
cogl_color_set_from_4ub (&white, 0xff, 0xff, 0xff, 0xff);
/* rectangle indices allow the GPU to interpret a list of quads (the
* faces of our cube) as a list of triangles.
*
* Since this is a very common thing to do
* cogl_get_rectangle_indices() is a convenience function for
* accessing internal index buffers that can be shared.
*/
data.indices = cogl_get_rectangle_indices (ctx, 6 /* n_rectangles */);
data.prim = cogl_primitive_new_p3t2 (ctx, COGL_VERTICES_MODE_TRIANGLES,
G_N_ELEMENTS (vertices),
vertices);
/* Each face will have 6 indices so we have 6 * 6 indices in total... */
cogl_primitive_set_indices (data.prim,
data.indices,
6 * 6);
/* Load a jpeg crate texture from a file */
printf ("crate.jpg (CC by-nc-nd http://bit.ly/9kP45T) ShadowRunner27 http://bit.ly/m1YXLh\n");
data.texture = cogl_texture_new_from_file (COGL_EXAMPLES_DATA "crate.jpg",
COGL_TEXTURE_NO_SLICING,
COGL_PIXEL_FORMAT_ANY,
&error);
if (!data.texture)
g_error ("Failed to load texture: %s", error->message);
/* a CoglPipeline conceptually describes all the state for vertex
* processing, fragment processing and blending geometry. When
* drawing the geometry for the crate this pipeline says to sample a
* single texture during fragment processing... */
data.crate_pipeline = cogl_pipeline_new (ctx);
cogl_pipeline_set_layer_texture (data.crate_pipeline, 0, data.texture);
/* Since the box is made of multiple triangles that will overlap
* when drawn and we don't control the order they are drawn in, we
* enable depth testing to make sure that triangles that shouldn't
* be visible get culled by the GPU. */
cogl_depth_state_init (&depth_state);
cogl_depth_state_set_test_enabled (&depth_state, TRUE);
cogl_pipeline_set_depth_state (data.crate_pipeline, &depth_state, NULL);
/* Setup a Pango font map and context */
data.pango_font_map = COGL_PANGO_FONT_MAP (cogl_pango_font_map_new (ctx));
cogl_pango_font_map_set_use_mipmapping (data.pango_font_map, TRUE);
data.pango_context =
pango_font_map_create_context (PANGO_FONT_MAP (data.pango_font_map));
data.pango_font_desc = pango_font_description_new ();
pango_font_description_set_family (data.pango_font_desc, "Sans");
pango_font_description_set_size (data.pango_font_desc, 30 * PANGO_SCALE);
/* Setup the "Hello Cogl" text */
data.hello_label = pango_layout_new (data.pango_context);
pango_layout_set_font_description (data.hello_label, data.pango_font_desc);
pango_layout_set_text (data.hello_label, "Hello Cogl", -1);
pango_layout_get_extents (data.hello_label, NULL, &hello_label_size);
data.hello_label_width = PANGO_PIXELS (hello_label_size.width);
data.hello_label_height = PANGO_PIXELS (hello_label_size.height);
data.swap_ready = TRUE;
has_swap_notify =
cogl_has_feature (ctx, COGL_FEATURE_ID_SWAP_BUFFERS_EVENT);
if (has_swap_notify)
cogl_onscreen_add_swap_buffers_callback (COGL_ONSCREEN (fb),
swap_notify_cb,
&data);
while (1)
{
CoglPollFD *poll_fds;
int n_poll_fds;
int64_t timeout;
if (data.swap_ready)
{
paint (&data);
cogl_onscreen_swap_buffers (COGL_ONSCREEN (fb));
}
cogl_poll_get_info (ctx, &poll_fds, &n_poll_fds, &timeout);
if (!has_swap_notify)
{
/* If the winsys doesn't support swap event notification
then we'll just redraw constantly */
data.swap_ready = TRUE;
timeout = 0;
}
g_poll ((GPollFD *) poll_fds, n_poll_fds,
timeout == -1 ? -1 : timeout / 1000);
cogl_poll_dispatch (ctx, poll_fds, n_poll_fds);
}
return 0;
}
void
cogl_set_modelview_matrix (CoglMatrix *matrix)
{
cogl_framebuffer_set_modelview_matrix (cogl_get_draw_framebuffer (), matrix);
}
static void
rig_journal_flush (GArray *journal,
RigPaintContext *paint_ctx)
{
RutPaintContext *rut_paint_ctx = &paint_ctx->_parent;
RutCamera *camera = rut_paint_ctx->camera;
CoglFramebuffer *fb = rut_camera_get_framebuffer (camera);
int start, dir, end;
int i;
/* TODO: use an inline qsort implementation */
g_array_sort (journal, (void *)sort_entry_cb);
/* We draw opaque geometry front-to-back so we are more likely to be
* able to discard later fragments earlier by depth testing.
*
* We draw transparent geometry back-to-front so it blends
* correctly.
*/
if ( paint_ctx->pass == RIG_PASS_COLOR_BLENDED)
{
start = 0;
dir = 1;
end = journal->len;
}
else
{
start = journal->len - 1;
dir = -1;
end = -1;
}
cogl_framebuffer_push_matrix (fb);
for (i = start; i != end; i += dir)
{
RigJournalEntry *entry = &g_array_index (journal, RigJournalEntry, i);
RutEntity *entity = entry->entity;
RutComponent *geometry =
rut_entity_get_component (entity, RUT_COMPONENT_TYPE_GEOMETRY);
CoglPipeline *pipeline;
CoglPrimitive *primitive;
float normal_matrix[9];
RutMaterial *material;
pipeline = get_entity_pipeline (paint_ctx->engine,
entity,
geometry,
paint_ctx->pass);
if (paint_ctx->pass == RIG_PASS_DOF_DEPTH ||
paint_ctx->pass == RIG_PASS_SHADOW)
{
/* FIXME: avoid updating these uniforms for every primitive if
* the focal parameters haven't change! */
set_focal_parameters (pipeline,
camera->focal_distance,
camera->depth_of_field);
}
else if (paint_ctx->pass == RIG_PASS_COLOR_UNBLENDED ||
paint_ctx->pass == RIG_PASS_COLOR_BLENDED)
{
int location;
RutLight *light = rut_entity_get_component (paint_ctx->engine->light,
RUT_COMPONENT_TYPE_LIGHT);
/* FIXME: only update the lighting uniforms when the light has
* actually moved! */
rut_light_set_uniforms (light, pipeline);
/* FIXME: only update the material uniforms when the material has
* actually changed! */
material = rut_entity_get_component (entity, RUT_COMPONENT_TYPE_MATERIAL);
if (material)
rut_material_flush_uniforms (material, pipeline);
get_normal_matrix (&entry->matrix, normal_matrix);
location = cogl_pipeline_get_uniform_location (pipeline, "normal_matrix");
cogl_pipeline_set_uniform_matrix (pipeline,
location,
3, /* dimensions */
1, /* count */
FALSE, /* don't transpose again */
normal_matrix);
}
if (rut_object_is (geometry, RUT_INTERFACE_ID_PRIMABLE))
{
primitive = rut_primable_get_primitive (geometry);
cogl_framebuffer_set_modelview_matrix (fb, &entry->matrix);
cogl_framebuffer_draw_primitive (fb,
pipeline,
primitive);
}
else if (rut_object_get_type (geometry) == &rut_text_type &&
paint_ctx->pass == RIG_PASS_COLOR_BLENDED)
{
cogl_framebuffer_set_modelview_matrix (fb, &entry->matrix);
rut_paintable_paint (geometry, rut_paint_ctx);
}
cogl_object_unref (pipeline);
rut_refable_unref (entry->entity);
}
cogl_framebuffer_pop_matrix (fb);
g_array_set_size (journal, 0);
}
