mirror of
https://github.com/brl/mutter.git
synced 2024-11-12 17:27:03 -05:00
Add a simple example of stereo drawing
Add a new example that draws a triangle floating in the air in front of the screen. Reviewed-by: Robert Bragg <robert.bragg@intel.com>
This commit is contained in:
parent
d16df5a5aa
commit
1b5beef5e5
@ -33,7 +33,7 @@ cogl_info_SOURCES = cogl-info.c
|
||||
cogl_info_LDADD = $(common_ldadd)
|
||||
|
||||
if USE_GLIB
|
||||
programs += cogl-hello cogl-msaa cogl-gles2-context cogl-point-sprites
|
||||
programs += cogl-hello cogl-msaa cogl-gles2-context cogl-point-sprites cogl-stereo
|
||||
examples_datadir = $(pkgdatadir)/examples-data
|
||||
examples_data_DATA =
|
||||
|
||||
@ -43,6 +43,8 @@ cogl_msaa_SOURCES = cogl-msaa.c
|
||||
cogl_msaa_LDADD = $(common_ldadd)
|
||||
cogl_point_sprites_SOURCES = cogl-point-sprites.c
|
||||
cogl_point_sprites_LDADD = $(common_ldadd)
|
||||
cogl_stereo_SOURCES = cogl-stereo.c
|
||||
cogl_stereo_LDADD = $(common_ldadd)
|
||||
|
||||
if BUILD_COGL_PANGO
|
||||
programs += cogl-crate
|
||||
|
152
examples/cogl-stereo.c
Normal file
152
examples/cogl-stereo.c
Normal file
@ -0,0 +1,152 @@
|
||||
#include <cogl/cogl.h>
|
||||
#include <glib.h>
|
||||
#include <stdio.h>
|
||||
|
||||
typedef struct _Data
|
||||
{
|
||||
CoglContext *ctx;
|
||||
CoglFramebuffer *fb;
|
||||
CoglPrimitive *left_triangle;
|
||||
CoglPrimitive *right_triangle;
|
||||
CoglPipeline *pipeline;
|
||||
|
||||
unsigned int redraw_idle;
|
||||
CoglBool is_dirty;
|
||||
CoglBool draw_ready;
|
||||
} Data;
|
||||
|
||||
static gboolean
|
||||
paint_cb (void *user_data)
|
||||
{
|
||||
Data *data = user_data;
|
||||
|
||||
data->redraw_idle = 0;
|
||||
data->is_dirty = FALSE;
|
||||
data->draw_ready = FALSE;
|
||||
|
||||
cogl_framebuffer_set_stereo_mode (data->fb, COGL_STEREO_BOTH);
|
||||
cogl_framebuffer_clear4f (data->fb, COGL_BUFFER_BIT_COLOR, 0, 0, 0, 1);
|
||||
|
||||
cogl_framebuffer_set_stereo_mode (data->fb, COGL_STEREO_LEFT);
|
||||
cogl_primitive_draw (data->left_triangle,
|
||||
data->fb,
|
||||
data->pipeline);
|
||||
|
||||
if (cogl_framebuffer_get_is_stereo (data->fb))
|
||||
{
|
||||
cogl_framebuffer_set_stereo_mode (data->fb, COGL_STEREO_RIGHT);
|
||||
cogl_primitive_draw (data->right_triangle,
|
||||
data->fb,
|
||||
data->pipeline);
|
||||
}
|
||||
|
||||
cogl_onscreen_swap_buffers (data->fb);
|
||||
|
||||
return G_SOURCE_REMOVE;
|
||||
}
|
||||
|
||||
static void
|
||||
maybe_redraw (Data *data)
|
||||
{
|
||||
if (data->is_dirty && data->draw_ready && data->redraw_idle == 0) {
|
||||
/* We'll draw on idle instead of drawing immediately so that
|
||||
* if Cogl reports multiple dirty rectangles we won't
|
||||
* redundantly draw multiple frames */
|
||||
data->redraw_idle = g_idle_add (paint_cb, data);
|
||||
}
|
||||
}
|
||||
|
||||
static void
|
||||
frame_event_cb (CoglOnscreen *onscreen,
|
||||
CoglFrameEvent event,
|
||||
CoglFrameInfo *info,
|
||||
void *user_data)
|
||||
{
|
||||
Data *data = user_data;
|
||||
|
||||
if (event == COGL_FRAME_EVENT_SYNC) {
|
||||
data->draw_ready = TRUE;
|
||||
maybe_redraw (data);
|
||||
}
|
||||
}
|
||||
|
||||
static void
|
||||
dirty_cb (CoglOnscreen *onscreen,
|
||||
const CoglOnscreenDirtyInfo *info,
|
||||
void *user_data)
|
||||
{
|
||||
Data *data = user_data;
|
||||
|
||||
data->is_dirty = TRUE;
|
||||
maybe_redraw (data);
|
||||
}
|
||||
|
||||
int
|
||||
main (int argc, char **argv)
|
||||
{
|
||||
Data data;
|
||||
CoglRenderer *renderer;
|
||||
CoglOnscreenTemplate *onscreen_template;
|
||||
CoglDisplay *display;
|
||||
CoglOnscreen *onscreen;
|
||||
CoglError *error = NULL;
|
||||
CoglVertexP2C4 left_triangle_vertices[] = {
|
||||
{0.05, 0.7, 0xff, 0x00, 0x00, 0xff},
|
||||
{-0.65, -0.7, 0x00, 0xff, 0x00, 0xff},
|
||||
{0.75, -0.7, 0x00, 0x00, 0xff, 0xff}
|
||||
};
|
||||
CoglVertexP2C4 right_triangle_vertices[] = {
|
||||
{-0.05, 0.7, 0xff, 0x00, 0x00, 0xff},
|
||||
{-0.75, -0.7, 0x00, 0xff, 0x00, 0xff},
|
||||
{0.65, -0.7, 0x00, 0x00, 0xff, 0xff}
|
||||
};
|
||||
GSource *cogl_source;
|
||||
GMainLoop *loop;
|
||||
|
||||
data.redraw_idle = 0;
|
||||
data.is_dirty = FALSE;
|
||||
data.draw_ready = TRUE;
|
||||
|
||||
renderer = cogl_renderer_new ();
|
||||
onscreen_template = cogl_onscreen_template_new (NULL);
|
||||
cogl_onscreen_template_set_stereo_enabled (onscreen_template, TRUE);
|
||||
display = cogl_display_new (renderer, onscreen_template);
|
||||
|
||||
data.ctx = cogl_context_new (display, &error);
|
||||
if (!data.ctx) {
|
||||
fprintf (stderr, "Failed to create stereo context: %s\n", error->message);
|
||||
return 1;
|
||||
}
|
||||
|
||||
onscreen = cogl_onscreen_new (data.ctx, 640, 480);
|
||||
cogl_onscreen_show (onscreen);
|
||||
data.fb = onscreen;
|
||||
|
||||
cogl_onscreen_set_resizable (onscreen, TRUE);
|
||||
|
||||
data.left_triangle = cogl_primitive_new_p2c4 (data.ctx,
|
||||
COGL_VERTICES_MODE_TRIANGLES,
|
||||
3, left_triangle_vertices);
|
||||
data.right_triangle = cogl_primitive_new_p2c4 (data.ctx,
|
||||
COGL_VERTICES_MODE_TRIANGLES,
|
||||
3, right_triangle_vertices);
|
||||
data.pipeline = cogl_pipeline_new (data.ctx);
|
||||
|
||||
cogl_source = cogl_glib_source_new (data.ctx, G_PRIORITY_DEFAULT);
|
||||
|
||||
g_source_attach (cogl_source, NULL);
|
||||
|
||||
cogl_onscreen_add_frame_callback (data.fb,
|
||||
frame_event_cb,
|
||||
&data,
|
||||
NULL); /* destroy notify */
|
||||
cogl_onscreen_add_dirty_callback (data.fb,
|
||||
dirty_cb,
|
||||
&data,
|
||||
NULL); /* destroy notify */
|
||||
|
||||
loop = g_main_loop_new (NULL, TRUE);
|
||||
g_main_loop_run (loop);
|
||||
|
||||
return 0;
|
||||
}
|
Loading…
Reference in New Issue
Block a user