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#define COGL_VERSION_MIN_REQUIRED COGL_VERSION_1_0
#include <cogl/cogl.h>
#include "test-utils.h"
#define RED 0
#define GREEN 1
#define BLUE 2
typedef struct _TestState
{
int fb_width;
int fb_height;
} TestState;
static void
check_quadrant (TestState *state,
int qx,
int qy,
uint32_t expected_rgba)
{
/* The quadrants are all stuffed into the top right corner of the
framebuffer */
int x = state->fb_width * qx / 4 + state->fb_width / 2;
int y = state->fb_height * qy / 4;
int width = state->fb_width / 4;
int height = state->fb_height / 4;
/* Subtract a two-pixel gap around the edges to allow some rounding
differences */
x += 2;
y += 2;
width -= 4;
height -= 4;
test_utils_check_region (test_fb, x, y, width, height, expected_rgba);
}
static void
test_paint (TestState *state)
{
CoglTexture2D *tex_2d;
CoglTexture *tex;
CoglOffscreen *offscreen;
tex_2d = cogl_texture_2d_new_with_size (test_ctx,
state->fb_width,
state->fb_height,
COGL_PIXEL_FORMAT_RGBA_8888_PRE);
tex = COGL_TEXTURE (tex_2d);
offscreen = cogl_offscreen_new_with_texture (tex);
/* Set a scale and translate transform on the window framebuffer
* before switching to the offscreen framebuffer so we can verify it
* gets restored when we switch back
*
* The test is going to draw a grid of 4 colors to a texture which
* we subsequently draw to the window with a fullscreen rectangle.
* This transform will flip the texture left to right, scale it to a
* 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);
cogl_push_framebuffer (COGL_FRAMEBUFFER (offscreen));
/* Cogl should release the last reference when we call cogl_pop_framebuffer()
*/
cogl_object_unref (offscreen);
/* Setup something other than the identity matrix for the modelview so we can
* verify it gets restored when we call cogl_pop_framebuffer () */
cogl_scale (2, 2, 1);
/* red, top left */
cogl_set_source_color4ub (0xff, 0x00, 0x00, 0xff);
cogl_rectangle (-0.5, 0.5, 0, 0);
/* green, top right */
cogl_set_source_color4ub (0x00, 0xff, 0x00, 0xff);
cogl_rectangle (0, 0.5, 0.5, 0);
/* blue, bottom left */
cogl_set_source_color4ub (0x00, 0x00, 0xff, 0xff);
cogl_rectangle (-0.5, 0, 0, -0.5);
/* white, bottom right */
cogl_set_source_color4ub (0xff, 0xff, 0xff, 0xff);
cogl_rectangle (0, 0, 0.5, -0.5);
cogl_pop_framebuffer ();
cogl_set_source_texture (tex);
cogl_rectangle (-1, 1, 1, -1);
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. */
/* red, top right */
check_quadrant (state, 1, 0, 0xff0000ff);
/* green, top left */
check_quadrant (state, 0, 0, 0x00ff00ff);
/* blue, bottom right */
check_quadrant (state, 1, 1, 0x0000ffff);
/* white, bottom left */
check_quadrant (state, 0, 1, 0xffffffff);
}
static void
test_flush (TestState *state)
{
CoglTexture2D *tex_2d;
CoglTexture *tex;
CoglOffscreen *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 (test_ctx,
16, 16, /* width/height */
COGL_PIXEL_FORMAT_RGBA_8888_PRE);
tex = COGL_TEXTURE (tex_2d);
offscreen = cogl_offscreen_new_with_texture (tex);
cogl_push_framebuffer (COGL_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 (COGL_FRAMEBUFFER (offscreen),
1, 1, 15, 15, 0xff0000ff);
else if (i == 1)
{
uint8_t 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 (test_fb,
2, 2, /* x/y */
state->fb_width - 4,
state->fb_height - 4,
0xff0000ff);
}
cogl_object_unref (tex_2d);
cogl_object_unref (offscreen);
}
}
void
test_offscreen (void)
{
TestState state;
state.fb_width = cogl_framebuffer_get_width (test_fb);
state.fb_height = cogl_framebuffer_get_height (test_fb);
/* XXX: we have to push/pop a framebuffer since this test currently
* uses the legacy cogl_rectangle() api. */
cogl_push_framebuffer (test_fb);
test_paint (&state);
test_flush (&state);
cogl_pop_framebuffer ();
if (cogl_test_verbose ())
g_print ("OK\n");
}
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