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mutter/examples/cogl-msaa.c

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examples: Adds a simple 4x msaa example This adds a very basic test of onscreen and offscreen multisample rendering with 4 samples per pixel. The test simply draws two triangles; the one on the left is rendered directly to the onscreen framebuffer and the other is first rendered offscreen before copying it onscreen. Reviewed-by: Neil Roberts <neil@linux.intel.com>
2011-08-23 13:47:35 +00:00
#include <cogl/cogl.h>
#include <glib.h>
#include <stdio.h>
int
main (int argc, char **argv)
{
CoglOnscreenTemplate *onscreen_template;
CoglDisplay *display;
CoglContext *ctx;
CoglOnscreen *onscreen;
CoglFramebuffer *fb;
GError *error = NULL;
CoglVertexP2C4 triangle_vertices[] = {
{0, 0.7, 0xff, 0x00, 0x00, 0x80},
{-0.7, -0.7, 0x00, 0xff, 0x00, 0xff},
{0.7, -0.7, 0x00, 0x00, 0xff, 0xff}
};
CoglPrimitive *triangle;
CoglHandle tex;
CoglHandle offscreen;
CoglFramebuffer *offscreen_fb;
CoglPipeline *pipeline;
onscreen_template = cogl_onscreen_template_new (NULL);
cogl_onscreen_template_set_samples_per_pixel (onscreen_template, 4);
display = cogl_display_new (NULL, onscreen_template);
if (!cogl_display_setup (display, &error))
{
fprintf (stderr, "Platform doesn't support onscreen 4x msaa rendering: %s\n",
error->message);
return 1;
}
ctx = cogl_context_new (display, &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);
cogl_framebuffer_set_samples_per_pixel (fb, 4);
if (!cogl_framebuffer_allocate (fb, &error))
{
g_error_free (error);
fprintf (stderr, "Failed to allocate 4x msaa offscreen framebuffer, "
"disabling msaa for onscreen rendering\n");
cogl_framebuffer_set_samples_per_pixel (fb, 0);
error = NULL;
if (!cogl_framebuffer_allocate (fb, &error))
{
fprintf (stderr, "Failed to allocate framebuffer: %s\n", error->message);
return 1;
}
}
cogl_onscreen_show (onscreen);
tex = cogl_texture_new_with_size (320, 480,
COGL_TEXTURE_NO_SLICING,
COGL_PIXEL_FORMAT_ANY);
offscreen = cogl_offscreen_new_to_texture (tex);
offscreen_fb = COGL_FRAMEBUFFER (offscreen);
cogl_framebuffer_set_samples_per_pixel (offscreen_fb, 4);
if (!cogl_framebuffer_allocate (offscreen_fb, &error))
{
g_error_free (error);
error = NULL;
fprintf (stderr, "Failed to allocate 4x msaa offscreen framebuffer, "
"disabling msaa for offscreen rendering");
cogl_framebuffer_set_samples_per_pixel (offscreen_fb, 0);
}
buffer: explicitly relate buffers to a context All CoglBuffer constructors now take an explicit CoglContext constructor. This is part of the on going effort to adapt to Cogl API so it no longer depends on a global, default context. Reviewed-by: Neil Roberts <neil@linux.intel.com>
2012-02-06 17:08:58 +00:00
triangle = cogl_primitive_new_p2c4 (ctx, COGL_VERTICES_MODE_TRIANGLES,
examples: Adds a simple 4x msaa example This adds a very basic test of onscreen and offscreen multisample rendering with 4 samples per pixel. The test simply draws two triangles; the one on the left is rendered directly to the onscreen framebuffer and the other is first rendered offscreen before copying it onscreen. Reviewed-by: Neil Roberts <neil@linux.intel.com>
2011-08-23 13:47:35 +00:00
3, triangle_vertices);
pipeline = cogl_pipeline_new ();
for (;;) {
Update all of the examples to use cogl_poll_get_info The aim is that it should be a requirement that all Cogl applications hook their mainloops into Cogl so we should lead by examples. Most of the examples now just call cogl_poll_get_info and then g_poll with a zero timeout so that they can continue to constantly redraw. The SDL example is a bit special because SDL makes it very difficult to wait on either a timeout or any file descriptors. The SDL winsys is documented not to require blocking on any file descriptors so we can ignore that. It implements the timeout by adding an SDL timer which pushes an event to the queue to wake up SDL_GetEvent. The Cogland example was already using the glib main loop so that one has been updated to add the CoglGLibSource to it. Reviewed-by: Robert Bragg <robert@linux.intel.com>
2011-12-19 15:40:55 +00:00
CoglPollFD *poll_fds;
int n_poll_fds;
gint64 timeout;
examples: use cogl_framebuffer_clear4f not cogl_clear cogl_clear depends on the default CoglContext which we are trying to steer the API away from requiring. cogl_framebuffer_clear4f is explicitly passed a framebuffer pointer which is implicitly related to a specific context. This updates all the examples to use cogl_framebuffer_clear4f instead of cogl_clear and removes any redundant CoglColor that was previously passed to cogl_clear. Reviewed-by: Neil Roberts <neil@linux.intel.com>
2012-01-07 23:28:36 +00:00
cogl_framebuffer_clear4f (fb, COGL_BUFFER_BIT_COLOR, 0, 0, 0, 1);
examples: Adds a simple 4x msaa example This adds a very basic test of onscreen and offscreen multisample rendering with 4 samples per pixel. The test simply draws two triangles; the one on the left is rendered directly to the onscreen framebuffer and the other is first rendered offscreen before copying it onscreen. Reviewed-by: Neil Roberts <neil@linux.intel.com>
2011-08-23 13:47:35 +00:00
examples: use framebuffer matrix stack apis Instead of using apis like cogl_push/pop_matrix, cogl_rotate, cogl_translate and cogl_scale all the examples now use the cogl_framebuffer_* equivalents. Our aim is to remove the need for the default CoglContext and so we are switching towards apis that are explicitly tied to a specific context. Reviewed-by: Neil Roberts <neil@linux.intel.com>
2012-01-07 23:48:08 +00:00
cogl_framebuffer_push_matrix (fb);
cogl_framebuffer_scale (fb, 0.5, 1, 1);
cogl_framebuffer_translate (fb, -1, 0, 0);
framebuffer: Add cogl_framebuffer draw methods This adds cogl_framebuffer_ apis for drawing attributes and primitives that replace corresponding apis that depend on the default CoglContext. This is part of the on going effort to adapt the Cogl api so it no longer depends on a global context variable. All the new drawing functions also take an explicit pipeline argument since we are also aiming to avoid being a stateful api like Cairo and OpenGL. Being stateless makes it easier for orthogonal components to share access to the GPU. Being stateless should also minimize any impedance miss-match for those wanting to build higher level stateless apis on top of Cogl. Note: none of the legacy, global state options such as cogl_set_depth_test_enabled(), cogl_set_backface_culling_enabled() or cogl_program_use() are supported by these new drawing apis and if set will simply be silently ignored. Reviewed-by: Neil Roberts <neil@linux.intel.com>
2012-01-08 02:59:04 +00:00
cogl_framebuffer_draw_primitive (fb, pipeline, triangle);
examples: use framebuffer matrix stack apis Instead of using apis like cogl_push/pop_matrix, cogl_rotate, cogl_translate and cogl_scale all the examples now use the cogl_framebuffer_* equivalents. Our aim is to remove the need for the default CoglContext and so we are switching towards apis that are explicitly tied to a specific context. Reviewed-by: Neil Roberts <neil@linux.intel.com>
2012-01-07 23:48:08 +00:00
cogl_framebuffer_pop_matrix (fb);
examples: Adds a simple 4x msaa example This adds a very basic test of onscreen and offscreen multisample rendering with 4 samples per pixel. The test simply draws two triangles; the one on the left is rendered directly to the onscreen framebuffer and the other is first rendered offscreen before copying it onscreen. Reviewed-by: Neil Roberts <neil@linux.intel.com>
2011-08-23 13:47:35 +00:00
cogl_push_framebuffer (offscreen_fb);
framebuffer: Add cogl_framebuffer draw methods This adds cogl_framebuffer_ apis for drawing attributes and primitives that replace corresponding apis that depend on the default CoglContext. This is part of the on going effort to adapt the Cogl api so it no longer depends on a global context variable. All the new drawing functions also take an explicit pipeline argument since we are also aiming to avoid being a stateful api like Cairo and OpenGL. Being stateless makes it easier for orthogonal components to share access to the GPU. Being stateless should also minimize any impedance miss-match for those wanting to build higher level stateless apis on top of Cogl. Note: none of the legacy, global state options such as cogl_set_depth_test_enabled(), cogl_set_backface_culling_enabled() or cogl_program_use() are supported by these new drawing apis and if set will simply be silently ignored. Reviewed-by: Neil Roberts <neil@linux.intel.com>
2012-01-08 02:59:04 +00:00
cogl_framebuffer_draw_primitive (fb, pipeline, triangle);
examples: Adds a simple 4x msaa example This adds a very basic test of onscreen and offscreen multisample rendering with 4 samples per pixel. The test simply draws two triangles; the one on the left is rendered directly to the onscreen framebuffer and the other is first rendered offscreen before copying it onscreen. Reviewed-by: Neil Roberts <neil@linux.intel.com>
2011-08-23 13:47:35 +00:00
cogl_framebuffer_resolve_samples (offscreen_fb);
cogl_pop_framebuffer ();
cogl_set_source_texture (tex);
cogl_rectangle (0, 1, 1, -1);
cogl_framebuffer_swap_buffers (fb);
Update all of the examples to use cogl_poll_get_info The aim is that it should be a requirement that all Cogl applications hook their mainloops into Cogl so we should lead by examples. Most of the examples now just call cogl_poll_get_info and then g_poll with a zero timeout so that they can continue to constantly redraw. The SDL example is a bit special because SDL makes it very difficult to wait on either a timeout or any file descriptors. The SDL winsys is documented not to require blocking on any file descriptors so we can ignore that. It implements the timeout by adding an SDL timer which pushes an event to the queue to wake up SDL_GetEvent. The Cogland example was already using the glib main loop so that one has been updated to add the CoglGLibSource to it. Reviewed-by: Robert Bragg <robert@linux.intel.com>
2011-12-19 15:40:55 +00:00
cogl_poll_get_info (ctx, &poll_fds, &n_poll_fds, &timeout);
g_poll ((GPollFD *) poll_fds, n_poll_fds, 0);
cogl_poll_dispatch (ctx, poll_fds, n_poll_fds);
examples: Adds a simple 4x msaa example This adds a very basic test of onscreen and offscreen multisample rendering with 4 samples per pixel. The test simply draws two triangles; the one on the left is rendered directly to the onscreen framebuffer and the other is first rendered offscreen before copying it onscreen. Reviewed-by: Neil Roberts <neil@linux.intel.com>
2011-08-23 13:47:35 +00:00
}
return 0;
}
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