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test-offscreen: Add tests that the offscreen's journal gets flushed

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This adds an extra test to test-offscreen then ensures the offscreen
framebuffer for a texture automatically flushes its journal in the
following three situations:

1. cogl_read_pixels is called immediately when the offscreen buffer is
   current.

2. cogl_texture_get_data is called on the offscreen's texture
   immediately after rendering to it.

3. The texture is rendered to the screen and immediately read back
   with cogl_read_pixels.

Currently the 2nd situation fails.

https://bugzilla.gnome.org/show_bug.cgi?id=668913

Reviewed-by: Robert Bragg <robert@linux.intel.com>
This commit is contained in:
Neil Roberts 2012-01-28 13:43:54 +00:00
parent cd9e1be6ae
commit f4a42fe988
1 changed files with 75 additions and 2 deletions
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77
tests/conform/test-offscreen.c
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@ -37,7 +37,7 @@ check_quadrant (TestState *state,
}
static void
paint (TestState *state)
test_paint (TestState *state)
{
CoglTexture2D *tex_2d;
CoglTexture *tex;
@ -62,6 +62,7 @@ paint (TestState *state)
* quarter of the window size and slide it to the top right of the
* window.
*/
cogl_push_matrix ();
cogl_translate (0.5, 0.5, 0);
cogl_scale (-0.5, 0.5, 1);
@ -95,6 +96,8 @@ paint (TestState *state)
cogl_object_unref (tex_2d);
cogl_pop_matrix ();
/* NB: The texture is drawn flipped horizontally and scaled to fit in the
* top right corner of the window. */
@ -108,6 +111,75 @@ paint (TestState *state)
check_quadrant (state, 0, 1, 0xffffffff);
}
static void
test_flush (TestState *state)
{
CoglTexture2D *tex_2d;
CoglTexture *tex;
CoglHandle offscreen;
CoglColor clear_color;
int i;
for (i = 0; i < 3; i++)
{
/* This tests that rendering to a framebuffer and then reading back
the contents of the texture will automatically flush the
journal */
tex_2d = cogl_texture_2d_new_with_size (state->context,
16, 16, /* width/height */
COGL_PIXEL_FORMAT_RGBA_8888_PRE,
NULL);
tex = COGL_TEXTURE (tex_2d);
offscreen = cogl_offscreen_new_to_texture (tex);
cogl_push_framebuffer (offscreen);
cogl_color_init_from_4ub (&clear_color, 0, 0, 0, 255);
cogl_clear (&clear_color, COGL_BUFFER_BIT_COLOR);
cogl_set_source_color4ub (255, 0, 0, 255);
cogl_rectangle (-1, -1, 1, 1);
if (i == 0)
/* First time check using read pixels on the offscreen */
test_utils_check_region (1, 1, 15, 15, 0xff0000ff);
else if (i == 1)
{
guint8 data[16 * 4 * 16];
int x, y;
/* Second time try reading back the texture contents */
cogl_texture_get_data (tex,
COGL_PIXEL_FORMAT_RGBA_8888_PRE,
16 * 4, /* rowstride */
data);
for (y = 1; y < 15; y++)
for (x = 1; x < 15; x++)
test_utils_compare_pixel (data + x * 4 + y * 16 * 4,
0xff0000ff);
}
cogl_pop_framebuffer ();
if (i == 2)
{
/* Third time try drawing the texture to the screen */
cogl_set_source_texture (tex);
cogl_rectangle (-1, -1, 1, 1);
test_utils_check_region (2, 2, /* x/y */
state->fb_width - 4,
state->fb_height - 4,
0xff0000ff);
}
cogl_object_unref (tex_2d);
cogl_handle_unref (offscreen);
}
}
void
test_cogl_offscreen (TestUtilsGTestFixture *fixture,
void *data)
@ -119,7 +191,8 @@ test_cogl_offscreen (TestUtilsGTestFixture *fixture,
state.fb_width = cogl_framebuffer_get_width (shared_state->fb);
state.fb_height = cogl_framebuffer_get_height (shared_state->fb);
paint (&state);
test_paint (&state);
test_flush (&state);
if (g_test_verbose ())
g_print ("OK\n");