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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,
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,
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_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,
64, 64,
COGL_PIXEL_FORMAT_RGBA_8888_PRE,
256 * 4,
texture_data,
32, 32, /* dst x, y */
0, /* level */
NULL); /* don't catch errors */
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");
}
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