7287dd1faf
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>
116 lines
3.5 KiB
C
116 lines
3.5 KiB
C
#include <cogl/cogl.h>
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#include <glib.h>
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#include <stdio.h>
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int
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main (int argc, char **argv)
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{
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CoglOnscreenTemplate *onscreen_template;
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CoglDisplay *display;
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CoglContext *ctx;
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CoglOnscreen *onscreen;
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CoglFramebuffer *fb;
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GError *error = NULL;
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CoglVertexP2C4 triangle_vertices[] = {
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{0, 0.7, 0xff, 0x00, 0x00, 0x80},
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{-0.7, -0.7, 0x00, 0xff, 0x00, 0xff},
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{0.7, -0.7, 0x00, 0x00, 0xff, 0xff}
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};
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CoglPrimitive *triangle;
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CoglHandle tex;
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CoglHandle offscreen;
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CoglFramebuffer *offscreen_fb;
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CoglPipeline *pipeline;
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onscreen_template = cogl_onscreen_template_new (NULL);
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cogl_onscreen_template_set_samples_per_pixel (onscreen_template, 4);
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display = cogl_display_new (NULL, onscreen_template);
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if (!cogl_display_setup (display, &error))
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{
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fprintf (stderr, "Platform doesn't support onscreen 4x msaa rendering: %s\n",
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error->message);
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return 1;
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}
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ctx = cogl_context_new (display, &error);
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if (!ctx)
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{
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fprintf (stderr, "Failed to create context: %s\n", error->message);
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return 1;
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}
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onscreen = cogl_onscreen_new (ctx, 640, 480);
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fb = COGL_FRAMEBUFFER (onscreen);
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cogl_framebuffer_set_samples_per_pixel (fb, 4);
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if (!cogl_framebuffer_allocate (fb, &error))
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{
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g_error_free (error);
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fprintf (stderr, "Failed to allocate 4x msaa offscreen framebuffer, "
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"disabling msaa for onscreen rendering\n");
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cogl_framebuffer_set_samples_per_pixel (fb, 0);
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error = NULL;
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if (!cogl_framebuffer_allocate (fb, &error))
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{
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fprintf (stderr, "Failed to allocate framebuffer: %s\n", error->message);
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return 1;
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}
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}
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cogl_onscreen_show (onscreen);
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tex = cogl_texture_new_with_size (320, 480,
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COGL_TEXTURE_NO_SLICING,
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COGL_PIXEL_FORMAT_ANY);
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offscreen = cogl_offscreen_new_to_texture (tex);
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offscreen_fb = COGL_FRAMEBUFFER (offscreen);
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cogl_framebuffer_set_samples_per_pixel (offscreen_fb, 4);
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if (!cogl_framebuffer_allocate (offscreen_fb, &error))
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{
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g_error_free (error);
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error = NULL;
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fprintf (stderr, "Failed to allocate 4x msaa offscreen framebuffer, "
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"disabling msaa for offscreen rendering");
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cogl_framebuffer_set_samples_per_pixel (offscreen_fb, 0);
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}
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cogl_push_framebuffer (fb);
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triangle = cogl_primitive_new_p2c4 (COGL_VERTICES_MODE_TRIANGLES,
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3, triangle_vertices);
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pipeline = cogl_pipeline_new ();
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for (;;) {
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CoglPollFD *poll_fds;
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int n_poll_fds;
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gint64 timeout;
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cogl_framebuffer_clear4f (fb, COGL_BUFFER_BIT_COLOR, 0, 0, 0, 1);
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cogl_push_matrix ();
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cogl_scale (0.5, 1, 1);
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cogl_translate (-1, 0, 0);
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cogl_set_source (pipeline);
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cogl_primitive_draw (triangle);
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cogl_pop_matrix ();
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cogl_push_framebuffer (offscreen_fb);
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cogl_primitive_draw (triangle);
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cogl_framebuffer_resolve_samples (offscreen_fb);
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cogl_pop_framebuffer ();
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cogl_set_source_texture (tex);
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cogl_rectangle (0, 1, 1, -1);
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cogl_framebuffer_swap_buffers (fb);
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cogl_poll_get_info (ctx, &poll_fds, &n_poll_fds, &timeout);
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g_poll ((GPollFD *) poll_fds, n_poll_fds, 0);
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cogl_poll_dispatch (ctx, poll_fds, n_poll_fds);
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}
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return 0;
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}
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