mutter/cogl/tests/conform/test-sub-texture.c

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#include <cogl/cogl.h>
#include <string.h>
#include "test-utils.h"
#define SOURCE_SIZE 32
#define SOURCE_DIVISIONS_X 2
#define SOURCE_DIVISIONS_Y 2
#define DIVISION_WIDTH (SOURCE_SIZE / SOURCE_DIVISIONS_X)
#define DIVISION_HEIGHT (SOURCE_SIZE / SOURCE_DIVISIONS_Y)
#define TEST_INSET 1
static const uint32_t
corner_colors[SOURCE_DIVISIONS_X * SOURCE_DIVISIONS_Y] =
{
0xff0000ff, /* red top left */
0x00ff00ff, /* green top right */
0x0000ffff, /* blue bottom left */
0xff00ffff /* purple bottom right */
};
typedef struct _TestState
{
CoglTexture2D *tex;
} TestState;
static CoglTexture2D *
create_source (TestState *state)
{
int dx, dy;
uint8_t *data = g_malloc (SOURCE_SIZE * SOURCE_SIZE * 4);
CoglTexture2D *tex;
/* Create a texture with a different coloured rectangle at each
corner */
for (dy = 0; dy < SOURCE_DIVISIONS_Y; dy++)
for (dx = 0; dx < SOURCE_DIVISIONS_X; dx++)
{
uint8_t *p = (data + dy * DIVISION_HEIGHT * SOURCE_SIZE * 4 +
dx * DIVISION_WIDTH * 4);
int x, y;
for (y = 0; y < DIVISION_HEIGHT; y++)
{
for (x = 0; x < DIVISION_WIDTH; x++)
{
uint32_t color = GUINT32_FROM_BE (corner_colors[dx + dy * SOURCE_DIVISIONS_X]);
memcpy (p, &color, 4);
p += 4;
}
p += SOURCE_SIZE * 4 - DIVISION_WIDTH * 4;
}
}
tex = cogl_texture_2d_new_from_data (test_ctx,
SOURCE_SIZE, SOURCE_SIZE,
COGL_PIXEL_FORMAT_RGBA_8888,
SOURCE_SIZE * 4,
data,
Adds CoglError api Although we use GLib internally in Cogl we would rather not leak GLib api through Cogl's own api, except through explicitly namespaced cogl_glib_ / cogl_gtype_ feature apis. One of the benefits we see to not leaking GLib through Cogl's public API is that documentation for Cogl won't need to first introduce the Glib API to newcomers, thus hopefully lowering the barrier to learning Cogl. This patch provides a Cogl specific typedef for reporting runtime errors which by no coincidence matches the typedef for GError exactly. If Cogl is built with --enable-glib (default) then developers can even safely assume that a CoglError is a GError under the hood. This patch also enforces a consistent policy for when NULL is passed as an error argument and an error is thrown. In this case we log the error and abort the application, instead of silently ignoring it. In common cases where nothing has been implemented to handle a particular error and/or where applications are just printing the error and aborting themselves then this saves some typing. This also seems more consistent with language based exceptions which usually cause a program to abort if they are not explicitly caught (which passing a non-NULL error signifies in this case) Since this policy for NULL error pointers is stricter than the standard GError convention, there is a clear note in the documentation to warn developers that are used to using the GError api. Reviewed-by: Neil Roberts <neil@linux.intel.com> (cherry picked from commit b068d5ea09ab32c37e8c965fc8582c85d1b2db46) Note: Since we can't change the Cogl 1.x api the patch was changed to not rename _error_quark() functions to be _error_domain() functions and although it's a bit ugly, instead of providing our own CoglError type that's compatible with GError we simply #define CoglError to GError unless Cogl is built with glib disabled. Note: this patch does technically introduce an API break since it drops the cogl_error_get_type() symbol generated by glib-mkenum (Since the CoglError enum was replaced by a CoglSystemError enum) but for now we are assuming that this will not affect anyone currently using the Cogl API. If this does turn out to be a problem in practice then we would be able to fix this my manually copying an implementation of cogl_error_get_type() generated by glib-mkenum into a compatibility source file and we could also define the original COGL_ERROR_ enums for compatibility too. Note: another minor concern with cherry-picking this patch to the 1.14 branch is that an api scanner would be lead to believe that some APIs have changed, and for example the gobject-introspection parser which understands the semantics of GError will not understand the semantics of CoglError. We expect most people that have tried to use gobject-introspection with Cogl already understand though that it is not well suited to generating bindings of the Cogl api anyway and we aren't aware or anyone depending on such bindings for apis involving GErrors. (GnomeShell only makes very-very minimal use of Cogl via the gjs bindings for the cogl_rectangle and cogl_color apis.) The main reason we have cherry-picked this patch to the 1.14 branch even given the above concerns is that without it it would become very awkward for us to cherry-pick other beneficial patches from master.
2012-08-31 14:28:27 -04:00
NULL);
return tex;
}
static CoglTexture2D *
create_test_texture (TestState *state)
{
CoglTexture2D *tex;
uint8_t *data = g_malloc (256 * 256 * 4), *p = data;
int x, y;
/* Create a texture that is 256x256 where the red component ranges
from 0->255 along the x axis and the green component ranges from
0->255 along the y axis. The blue and alpha components are all
255 */
for (y = 0; y < 256; y++)
for (x = 0; x < 256; x++)
{
*(p++) = x;
*(p++) = y;
*(p++) = 255;
*(p++) = 255;
}
tex = cogl_texture_2d_new_from_data (test_ctx,
256, 256,
COGL_PIXEL_FORMAT_RGBA_8888_PRE,
256 * 4,
data,
Adds CoglError api Although we use GLib internally in Cogl we would rather not leak GLib api through Cogl's own api, except through explicitly namespaced cogl_glib_ / cogl_gtype_ feature apis. One of the benefits we see to not leaking GLib through Cogl's public API is that documentation for Cogl won't need to first introduce the Glib API to newcomers, thus hopefully lowering the barrier to learning Cogl. This patch provides a Cogl specific typedef for reporting runtime errors which by no coincidence matches the typedef for GError exactly. If Cogl is built with --enable-glib (default) then developers can even safely assume that a CoglError is a GError under the hood. This patch also enforces a consistent policy for when NULL is passed as an error argument and an error is thrown. In this case we log the error and abort the application, instead of silently ignoring it. In common cases where nothing has been implemented to handle a particular error and/or where applications are just printing the error and aborting themselves then this saves some typing. This also seems more consistent with language based exceptions which usually cause a program to abort if they are not explicitly caught (which passing a non-NULL error signifies in this case) Since this policy for NULL error pointers is stricter than the standard GError convention, there is a clear note in the documentation to warn developers that are used to using the GError api. Reviewed-by: Neil Roberts <neil@linux.intel.com> (cherry picked from commit b068d5ea09ab32c37e8c965fc8582c85d1b2db46) Note: Since we can't change the Cogl 1.x api the patch was changed to not rename _error_quark() functions to be _error_domain() functions and although it's a bit ugly, instead of providing our own CoglError type that's compatible with GError we simply #define CoglError to GError unless Cogl is built with glib disabled. Note: this patch does technically introduce an API break since it drops the cogl_error_get_type() symbol generated by glib-mkenum (Since the CoglError enum was replaced by a CoglSystemError enum) but for now we are assuming that this will not affect anyone currently using the Cogl API. If this does turn out to be a problem in practice then we would be able to fix this my manually copying an implementation of cogl_error_get_type() generated by glib-mkenum into a compatibility source file and we could also define the original COGL_ERROR_ enums for compatibility too. Note: another minor concern with cherry-picking this patch to the 1.14 branch is that an api scanner would be lead to believe that some APIs have changed, and for example the gobject-introspection parser which understands the semantics of GError will not understand the semantics of CoglError. We expect most people that have tried to use gobject-introspection with Cogl already understand though that it is not well suited to generating bindings of the Cogl api anyway and we aren't aware or anyone depending on such bindings for apis involving GErrors. (GnomeShell only makes very-very minimal use of Cogl via the gjs bindings for the cogl_rectangle and cogl_color apis.) The main reason we have cherry-picked this patch to the 1.14 branch even given the above concerns is that without it it would become very awkward for us to cherry-pick other beneficial patches from master.
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NULL);
g_free (data);
return tex;
}
static void
paint (TestState *state)
{
CoglTexture2D *full_texture;
CoglSubTexture *sub_texture, *sub_sub_texture;
CoglPipeline *pipeline = cogl_pipeline_new (test_ctx);
/* Create a sub texture of the bottom right quarter of the texture */
sub_texture = cogl_sub_texture_new (test_ctx,
state->tex,
DIVISION_WIDTH,
DIVISION_HEIGHT,
DIVISION_WIDTH,
DIVISION_HEIGHT);
/* Paint it */
cogl_pipeline_set_layer_texture (pipeline, 0, sub_texture);
cogl_object_unref (sub_texture);
cogl_framebuffer_draw_rectangle (test_fb, pipeline,
0.0f, 0.0f, DIVISION_WIDTH, DIVISION_HEIGHT);
/* Repeat a sub texture of the top half of the full texture. This is
documented to be undefined so it doesn't technically have to work
but it will with the current implementation */
sub_texture = cogl_sub_texture_new (test_ctx,
state->tex,
0, 0,
SOURCE_SIZE,
DIVISION_HEIGHT);
cogl_pipeline_set_layer_texture (pipeline, 0, sub_texture);
cogl_object_unref (sub_texture);
cogl_framebuffer_draw_textured_rectangle (test_fb, pipeline,
0.0f,
SOURCE_SIZE,
SOURCE_SIZE * 2.0f,
SOURCE_SIZE * 1.5f,
0.0f, 0.0f,
2.0f, 1.0f);
/* Create a sub texture of a sub texture */
full_texture = create_test_texture (state);
sub_texture = cogl_sub_texture_new (test_ctx,
full_texture,
20, 10, 30, 20);
cogl_object_unref (full_texture);
sub_sub_texture = cogl_sub_texture_new (test_ctx,
sub_texture,
20, 10, 10, 10);
cogl_object_unref (sub_texture);
cogl_pipeline_set_layer_texture (pipeline, 0, sub_sub_texture);
cogl_object_unref (sub_sub_texture);
cogl_framebuffer_draw_rectangle (test_fb, pipeline,
0.0f, SOURCE_SIZE * 2.0f,
10.0f, SOURCE_SIZE * 2.0f + 10.0f);
cogl_object_unref (pipeline);
}
static void
validate_part (int xpos, int ypos,
int width, int height,
uint32_t color)
{
test_utils_check_region (test_fb,
xpos + TEST_INSET,
ypos + TEST_INSET,
width - TEST_INSET - 2,
height - TEST_INSET - 2,
color);
}
static uint8_t *
create_update_data (void)
{
uint8_t *data = g_malloc (256 * 256 * 4), *p = data;
int x, y;
/* Create some image data that is 256x256 where the blue component
ranges from 0->255 along the x axis and the alpha component
ranges from 0->255 along the y axis. The red and green components
are all zero */
for (y = 0; y < 256; y++)
for (x = 0; x < 256; x++)
{
*(p++) = 0;
*(p++) = 0;
*(p++) = x;
*(p++) = y;
}
return data;
}
static void
validate_result (TestState *state)
{
int i, division_num, x, y;
CoglTexture2D *test_tex;
CoglSubTexture *sub_texture;
uint8_t *texture_data, *p;
int tex_width, tex_height;
/* Sub texture of the bottom right corner of the texture */
validate_part (0, 0, DIVISION_WIDTH, DIVISION_HEIGHT,
corner_colors[
(SOURCE_DIVISIONS_Y - 1) * SOURCE_DIVISIONS_X +
SOURCE_DIVISIONS_X - 1]);
/* Sub texture of the top half repeated horizontally */
for (i = 0; i < 2; i++)
for (division_num = 0; division_num < SOURCE_DIVISIONS_X; division_num++)
validate_part (i * SOURCE_SIZE + division_num * DIVISION_WIDTH,
SOURCE_SIZE,
DIVISION_WIDTH, DIVISION_HEIGHT,
corner_colors[division_num]);
/* Sub sub texture */
p = texture_data = g_malloc (10 * 10 * 4);
cogl_flush ();
cogl_framebuffer_read_pixels (test_fb,
0, SOURCE_SIZE * 2, 10, 10,
COGL_PIXEL_FORMAT_RGBA_8888,
p);
for (y = 0; y < 10; y++)
for (x = 0; x < 10; x++)
{
g_assert (*(p++) == x + 40);
g_assert (*(p++) == y + 20);
p += 2;
}
g_free (texture_data);
/* Try reading back the texture data */
sub_texture = cogl_sub_texture_new (test_ctx,
state->tex,
SOURCE_SIZE / 4,
SOURCE_SIZE / 4,
SOURCE_SIZE / 2,
SOURCE_SIZE / 2);
tex_width = cogl_texture_get_width (sub_texture);
tex_height = cogl_texture_get_height (sub_texture);
p = texture_data = g_malloc (tex_width * tex_height * 4);
cogl_texture_get_data (sub_texture,
COGL_PIXEL_FORMAT_RGBA_8888,
tex_width * 4,
texture_data);
for (y = 0; y < tex_height; y++)
for (x = 0; x < tex_width; x++)
{
int div_x = ((x * SOURCE_SIZE / 2 / tex_width + SOURCE_SIZE / 4) /
DIVISION_WIDTH);
int div_y = ((y * SOURCE_SIZE / 2 / tex_height + SOURCE_SIZE / 4) /
DIVISION_HEIGHT);
uint32_t reference = corner_colors[div_x + div_y * SOURCE_DIVISIONS_X] >> 8;
uint32_t color = GUINT32_FROM_BE (*((uint32_t *)p)) >> 8;
g_assert (color == reference);
p += 4;
}
g_free (texture_data);
cogl_object_unref (sub_texture);
/* Create a 256x256 test texture */
test_tex = create_test_texture (state);
/* Create a sub texture the views the center half of the texture */
sub_texture = cogl_sub_texture_new (test_ctx,
test_tex,
64, 64, 128, 128);
/* Update the center half of the sub texture */
texture_data = create_update_data ();
cogl_texture_set_region (sub_texture,
0, 0, 32, 32, 64, 64, 256, 256,
COGL_PIXEL_FORMAT_RGBA_8888_PRE, 256 * 4,
texture_data);
g_free (texture_data);
cogl_object_unref (sub_texture);
/* Get the texture data */
p = texture_data = g_malloc (256 * 256 * 4);
cogl_texture_get_data (test_tex,
COGL_PIXEL_FORMAT_RGBA_8888_PRE,
256 * 4, texture_data);
/* Verify the texture data */
for (y = 0; y < 256; y++)
for (x = 0; x < 256; x++)
{
/* If we're in the center quarter */
if (x >= 96 && x < 160 && y >= 96 && y < 160)
{
g_assert ((*p++) == 0);
g_assert ((*p++) == 0);
g_assert ((*p++) == x - 96);
g_assert ((*p++) == y - 96);
}
else
{
g_assert ((*p++) == x);
g_assert ((*p++) == y);
g_assert ((*p++) == 255);
g_assert ((*p++) == 255);
}
}
g_free (texture_data);
cogl_object_unref (test_tex);
}
void
test_sub_texture (void)
{
TestState state;
state.tex = create_source (&state);
cogl_framebuffer_orthographic (test_fb,
0, 0,
cogl_framebuffer_get_width (test_fb),
cogl_framebuffer_get_height (test_fb),
-1,
100);
paint (&state);
validate_result (&state);
cogl_object_unref (state.tex);
if (cogl_test_verbose ())
g_print ("OK\n");
}