339 lines
9.7 KiB
C
339 lines
9.7 KiB
C
|
|
#include <clutter/clutter.h>
|
|
#include <cogl/cogl.h>
|
|
#include <string.h>
|
|
|
|
#include "test-conform-common.h"
|
|
|
|
#ifdef CLUTTER_COGL_HAS_GL
|
|
|
|
/* Size the texture so that it is just off a power of two to enourage
|
|
it so use software tiling when NPOTs aren't available */
|
|
#define TEXTURE_SIZE 257
|
|
|
|
#else /* CLUTTER_COGL_HAS_GL */
|
|
|
|
/* We can't use the funny-sized texture on GL ES because it will break
|
|
cogl_texture_polygon. However there is only one code path for
|
|
rendering quads so there is no need */
|
|
#define TEXTURE_SIZE 32
|
|
|
|
#endif /* CLUTTER_COGL_HAS_GL */
|
|
|
|
/* Amount of pixels to skip off the top, bottom, left and right of the
|
|
texture when reading back the stage */
|
|
#define TEST_INSET 4
|
|
|
|
/* Size to actually render the texture at */
|
|
#define TEXTURE_RENDER_SIZE 32
|
|
|
|
typedef struct _TestState
|
|
{
|
|
CoglHandle texture;
|
|
CoglHandle offscreen;
|
|
CoglHandle offscreen_tex;
|
|
} TestState;
|
|
|
|
static gboolean
|
|
validate_part (int xnum, int ynum, gboolean shown)
|
|
{
|
|
guchar *pixels, *p;
|
|
gboolean ret = TRUE;
|
|
|
|
pixels = g_malloc0 ((TEXTURE_RENDER_SIZE - TEST_INSET * 2)
|
|
* (TEXTURE_RENDER_SIZE - TEST_INSET * 2) * 4);
|
|
|
|
/* Read the appropriate part but skip out a few pixels around the
|
|
edges */
|
|
cogl_read_pixels (xnum * TEXTURE_RENDER_SIZE + TEST_INSET,
|
|
ynum * TEXTURE_RENDER_SIZE + TEST_INSET,
|
|
TEXTURE_RENDER_SIZE - TEST_INSET * 2,
|
|
TEXTURE_RENDER_SIZE - TEST_INSET * 2,
|
|
COGL_READ_PIXELS_COLOR_BUFFER,
|
|
COGL_PIXEL_FORMAT_RGBA_8888,
|
|
pixels);
|
|
|
|
/* Make sure every pixels is the appropriate color */
|
|
for (p = pixels;
|
|
p < pixels + ((TEXTURE_RENDER_SIZE - TEST_INSET * 2)
|
|
* (TEXTURE_RENDER_SIZE - TEST_INSET * 2));
|
|
p += 4)
|
|
{
|
|
if (p[0] != (shown ? 255 : 0))
|
|
ret = FALSE;
|
|
if (p[1] != 0)
|
|
ret = FALSE;
|
|
if (p[2] != 0)
|
|
ret = FALSE;
|
|
}
|
|
|
|
g_free (pixels);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static void
|
|
do_test_backface_culling (TestState *state)
|
|
{
|
|
int i;
|
|
CoglHandle material = cogl_material_new ();
|
|
|
|
cogl_material_set_layer_filters (material, 0,
|
|
COGL_MATERIAL_FILTER_NEAREST,
|
|
COGL_MATERIAL_FILTER_NEAREST);
|
|
|
|
cogl_set_backface_culling_enabled (TRUE);
|
|
|
|
cogl_push_matrix ();
|
|
|
|
/* Render the scene twice - once with backface culling enabled and
|
|
once without. The second time is translated so that it is below
|
|
the first */
|
|
for (i = 0; i < 2; i++)
|
|
{
|
|
float x1 = 0, x2, y1 = 0, y2 = (float)(TEXTURE_RENDER_SIZE);
|
|
CoglTextureVertex verts[4];
|
|
|
|
cogl_set_source (material);
|
|
|
|
memset (verts, 0, sizeof (verts));
|
|
|
|
x2 = x1 + (float)(TEXTURE_RENDER_SIZE);
|
|
|
|
/* Draw a front-facing texture */
|
|
cogl_material_set_layer (material, 0, state->texture);
|
|
cogl_rectangle (x1, y1, x2, y2);
|
|
|
|
x1 = x2;
|
|
x2 = x1 + (float)(TEXTURE_RENDER_SIZE);
|
|
|
|
/* Draw a front-facing texture with flipped texcoords */
|
|
cogl_material_set_layer (material, 0, state->texture);
|
|
cogl_rectangle_with_texture_coords (x1, y1, x2, y2,
|
|
1.0, 0.0, 0.0, 1.0);
|
|
|
|
x1 = x2;
|
|
x2 = x1 + (float)(TEXTURE_RENDER_SIZE);
|
|
|
|
/* Draw a back-facing texture */
|
|
cogl_material_set_layer (material, 0, state->texture);
|
|
cogl_rectangle (x2, y1, x1, y2);
|
|
|
|
x1 = x2;
|
|
x2 = x1 + (float)(TEXTURE_RENDER_SIZE);
|
|
|
|
/* Draw a front-facing texture polygon */
|
|
verts[0].x = x1; verts[0].y = y2;
|
|
verts[1].x = x2; verts[1].y = y2;
|
|
verts[2].x = x2; verts[2].y = y1;
|
|
verts[3].x = x1; verts[3].y = y1;
|
|
verts[0].tx = 0; verts[0].ty = 0;
|
|
verts[1].tx = 1.0; verts[1].ty = 0;
|
|
verts[2].tx = 1.0; verts[2].ty = 1.0;
|
|
verts[3].tx = 0; verts[3].ty = 1.0;
|
|
cogl_material_set_layer (material, 0, state->texture);
|
|
cogl_polygon (verts, 4, FALSE);
|
|
|
|
x1 = x2;
|
|
x2 = x1 + (float)(TEXTURE_RENDER_SIZE);
|
|
|
|
/* Draw a back-facing texture polygon */
|
|
verts[0].x = x1; verts[0].y = y1;
|
|
verts[1].x = x2; verts[1].y = y1;
|
|
verts[2].x = x2; verts[2].y = y2;
|
|
verts[3].x = x1; verts[3].y = y2;
|
|
verts[0].tx = 0; verts[0].ty = 0;
|
|
verts[1].tx = 1.0; verts[1].ty = 0;
|
|
verts[2].tx = 1.0; verts[2].ty = 1.0;
|
|
verts[3].tx = 0; verts[3].ty = 1.0;
|
|
cogl_material_set_layer (material, 0, state->texture);
|
|
cogl_polygon (verts, 4, FALSE);
|
|
|
|
x1 = x2;
|
|
x2 = x1 + (float)(TEXTURE_RENDER_SIZE);
|
|
|
|
/* Draw a regular rectangle (this should always show) */
|
|
cogl_set_source_color4f (1.0, 0, 0, 1.0);
|
|
cogl_rectangle (x1, y1, x2, y2);
|
|
|
|
/* The second time round draw beneath the first with backface
|
|
culling disabled */
|
|
cogl_translate (0, TEXTURE_RENDER_SIZE, 0);
|
|
cogl_set_backface_culling_enabled (FALSE);
|
|
}
|
|
|
|
cogl_handle_unref (material);
|
|
|
|
cogl_pop_matrix ();
|
|
|
|
/* Front-facing texture */
|
|
g_assert (validate_part (0, 0, TRUE));
|
|
/* Front-facing texture with flipped tex coords */
|
|
g_assert (validate_part (1, 0, TRUE));
|
|
/* Back-facing texture */
|
|
g_assert (validate_part (2, 0, FALSE));
|
|
/* Front-facing texture polygon */
|
|
g_assert (validate_part (3, 0, TRUE));
|
|
/* Back-facing texture polygon */
|
|
g_assert (validate_part (4, 0, FALSE));
|
|
/* Regular rectangle */
|
|
g_assert (validate_part (5, 0, TRUE));
|
|
|
|
/* Backface culling disabled - everything should be shown */
|
|
|
|
/* Front-facing texture */
|
|
g_assert (validate_part (0, 1, TRUE));
|
|
/* Front-facing texture with flipped tex coords */
|
|
g_assert (validate_part (1, 1, TRUE));
|
|
/* Back-facing texture */
|
|
g_assert (validate_part (2, 1, TRUE));
|
|
/* Front-facing texture polygon */
|
|
g_assert (validate_part (3, 1, TRUE));
|
|
/* Back-facing texture polygon */
|
|
g_assert (validate_part (4, 1, TRUE));
|
|
/* Regular rectangle */
|
|
g_assert (validate_part (5, 1, TRUE));
|
|
|
|
}
|
|
|
|
static void
|
|
on_paint (ClutterActor *actor, TestState *state)
|
|
{
|
|
CoglColor clr;
|
|
float stage_viewport[4];
|
|
CoglMatrix stage_projection;
|
|
CoglMatrix stage_modelview;
|
|
|
|
cogl_color_set_from_4ub (&clr, 0x00, 0x00, 0x00, 0xff);
|
|
|
|
do_test_backface_culling (state);
|
|
|
|
/* Since we are going to repeat the test rendering offscreen we clear the
|
|
* stage, just to minimize the chance of a some other bug causing us
|
|
* mistakenly reading back the results from the stage and giving a false
|
|
* posistive. */
|
|
cogl_clear (&clr, COGL_BUFFER_BIT_COLOR|COGL_BUFFER_BIT_STENCIL);
|
|
|
|
/*
|
|
* Now repeat the test but rendered to an offscreen framebuffer...
|
|
*/
|
|
|
|
cogl_get_viewport (stage_viewport);
|
|
cogl_get_projection_matrix (&stage_projection);
|
|
cogl_get_modelview_matrix (&stage_modelview);
|
|
|
|
cogl_push_framebuffer (state->offscreen);
|
|
|
|
cogl_clear (&clr, COGL_BUFFER_BIT_COLOR|COGL_BUFFER_BIT_STENCIL);
|
|
|
|
cogl_set_viewport (stage_viewport[0],
|
|
stage_viewport[1],
|
|
stage_viewport[2],
|
|
stage_viewport[3]);
|
|
cogl_set_projection_matrix (&stage_projection);
|
|
cogl_set_modelview_matrix (&stage_modelview);
|
|
|
|
do_test_backface_culling (state);
|
|
|
|
cogl_pop_framebuffer ();
|
|
|
|
/* Incase we want feedback of what was drawn offscreen we draw it
|
|
* to the stage... */
|
|
cogl_set_source_texture (state->offscreen_tex);
|
|
cogl_rectangle (0, 0, stage_viewport[2], stage_viewport[3]);
|
|
|
|
/* Comment this out if you want visual feedback of what this test
|
|
* paints.
|
|
*/
|
|
clutter_main_quit ();
|
|
}
|
|
|
|
static gboolean
|
|
queue_redraw (gpointer stage)
|
|
{
|
|
clutter_actor_queue_redraw (CLUTTER_ACTOR (stage));
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
static CoglHandle
|
|
make_texture (void)
|
|
{
|
|
guchar *tex_data, *p;
|
|
CoglHandle tex;
|
|
|
|
tex_data = g_malloc (TEXTURE_SIZE * TEXTURE_SIZE * 4);
|
|
|
|
for (p = tex_data + TEXTURE_SIZE * TEXTURE_SIZE * 4; p > tex_data;)
|
|
{
|
|
*(--p) = 255;
|
|
*(--p) = 0;
|
|
*(--p) = 0;
|
|
*(--p) = 255;
|
|
}
|
|
|
|
tex = cogl_texture_new_from_data (TEXTURE_SIZE,
|
|
TEXTURE_SIZE,
|
|
COGL_TEXTURE_NONE,
|
|
COGL_PIXEL_FORMAT_RGBA_8888,
|
|
COGL_PIXEL_FORMAT_ANY,
|
|
TEXTURE_SIZE * 4,
|
|
tex_data);
|
|
|
|
g_free (tex_data);
|
|
|
|
return tex;
|
|
}
|
|
|
|
void
|
|
test_cogl_backface_culling (TestConformSimpleFixture *fixture,
|
|
gconstpointer data)
|
|
{
|
|
TestState state;
|
|
CoglHandle tex;
|
|
ClutterActor *stage;
|
|
float stage_width;
|
|
float stage_height;
|
|
const ClutterColor stage_color = { 0x0, 0x0, 0x0, 0xff };
|
|
ClutterActor *group;
|
|
guint idle_source;
|
|
|
|
stage = clutter_stage_get_default ();
|
|
clutter_actor_get_size (stage, &stage_width, &stage_height);
|
|
|
|
state.offscreen = COGL_INVALID_HANDLE;
|
|
|
|
state.texture = make_texture ();
|
|
|
|
tex = cogl_texture_new_with_size (stage_width, stage_height,
|
|
COGL_TEXTURE_NO_SLICING,
|
|
COGL_PIXEL_FORMAT_ANY); /* internal fmt */
|
|
state.offscreen = cogl_offscreen_new_to_texture (tex);
|
|
state.offscreen_tex = tex;
|
|
|
|
clutter_stage_set_color (CLUTTER_STAGE (stage), &stage_color);
|
|
|
|
group = clutter_group_new ();
|
|
clutter_container_add_actor (CLUTTER_CONTAINER (stage), group);
|
|
|
|
/* We force continuous redrawing of the stage, since we need to skip
|
|
* the first few frames, and we wont be doing anything else that
|
|
* will trigger redrawing. */
|
|
idle_source = g_idle_add (queue_redraw, stage);
|
|
|
|
g_signal_connect (group, "paint", G_CALLBACK (on_paint), &state);
|
|
|
|
clutter_actor_show_all (stage);
|
|
|
|
clutter_main ();
|
|
|
|
g_source_remove (idle_source);
|
|
|
|
cogl_handle_unref (state.offscreen);
|
|
cogl_handle_unref (state.offscreen_tex);
|
|
cogl_handle_unref (state.texture);
|
|
|
|
if (g_test_verbose ())
|
|
g_print ("OK\n");
|
|
}
|
|
|