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mutter/tests/conform/test-sub-texture.c
Robert Bragg 3881fd3259 Adds cogl_framebuffer_draw_[*_]rectangle functions 
This adds experimental 2.0 api replacements for the cogl_rectangle[_*]
functions that don't depend on having a current pipeline set on the
context via cogl_{set,push}_source() or having a current framebuffer set
on the context via cogl_push_framebuffer(). The aim for 2.0 is to switch
away from having a statefull context that affects drawing to having
framebuffer drawing apis that are explicitly passed a framebuffer and
pipeline.

To test this change several of the conformance tests were updated to use
this api instead of cogl_rectangle and
cogl_rectangle_with_texture_coords. Since it's quite laborious going
through all of the conformance tests the opportunity was taken to make
other clean ups in the conformance tests to replace other uses of
1.x api with experimental 2.0 api so long as that didn't affect what was
being tested.
2012-03-20 12:33:40 +00:00

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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 guint32
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;
guint8 *data = g_malloc (SOURCE_SIZE * SOURCE_SIZE * 4);
CoglTexture2D *tex;
GError *error = NULL;
/* 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++)
{
guint8 *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++)
{
guint32 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 (ctx,
SOURCE_SIZE, SOURCE_SIZE,
COGL_PIXEL_FORMAT_RGBA_8888,
COGL_PIXEL_FORMAT_ANY,
SOURCE_SIZE * 4,
data,
&error);
g_assert_no_error (error);
return tex;
}
static CoglTexture2D *
create_test_texture (TestState *state)
{
CoglTexture2D *tex;
guint8 *data = g_malloc (256 * 256 * 4), *p = data;
int x, y;
GError *error = NULL;
/* 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 (ctx,
256, 256,
COGL_PIXEL_FORMAT_RGBA_8888_PRE,
COGL_PIXEL_FORMAT_ANY,
256 * 4,
data,
&error);
g_assert_no_error (error);
g_free (data);
return tex;
}
static void
paint (TestState *state)
{
CoglTexture2D *full_texture;
CoglSubTexture *sub_texture, *sub_sub_texture;
CoglPipeline *pipeline = cogl_pipeline_new (ctx);
/* Create a sub texture of the bottom right quarter of the texture */
sub_texture = cogl_sub_texture_new (ctx,
COGL_TEXTURE (state->tex),
DIVISION_WIDTH,
DIVISION_HEIGHT,
DIVISION_WIDTH,
DIVISION_HEIGHT);
/* Paint it */
cogl_pipeline_set_layer_texture (pipeline, 0, COGL_TEXTURE (sub_texture));
cogl_object_unref (sub_texture);
cogl_framebuffer_draw_rectangle (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 (ctx,
COGL_TEXTURE (state->tex),
0, 0,
SOURCE_SIZE,
DIVISION_HEIGHT);
cogl_pipeline_set_layer_texture (pipeline, 0, COGL_TEXTURE (sub_texture));
cogl_object_unref (sub_texture);
cogl_framebuffer_draw_textured_rectangle (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 (ctx,
COGL_TEXTURE (full_texture),
20, 10, 30, 20);
cogl_object_unref (full_texture);
sub_sub_texture = cogl_sub_texture_new (ctx,
COGL_TEXTURE (sub_texture),
20, 10, 10, 10);
cogl_object_unref (sub_texture);
cogl_pipeline_set_layer_texture (pipeline, 0, COGL_TEXTURE (sub_sub_texture));
cogl_object_unref (sub_sub_texture);
cogl_framebuffer_draw_rectangle (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,
guint32 color)
{
test_utils_check_region (fb,
xpos + TEST_INSET,
ypos + TEST_INSET,
width - TEST_INSET - 2,
height - TEST_INSET - 2,
color);
}
static guint8 *
create_update_data (void)
{
guint8 *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;
guint8 *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 (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 (ctx,
COGL_TEXTURE (state->tex),
SOURCE_SIZE / 4,
SOURCE_SIZE / 4,
SOURCE_SIZE / 2,
SOURCE_SIZE / 2);
tex_width = cogl_texture_get_width (COGL_TEXTURE (sub_texture));
tex_height = cogl_texture_get_height (COGL_TEXTURE (sub_texture));
p = texture_data = g_malloc (tex_width * tex_height * 4);
cogl_texture_get_data (COGL_TEXTURE (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);
guint32 reference = corner_colors[div_x + div_y * SOURCE_DIVISIONS_X] >> 8;
guint32 color = GUINT32_FROM_BE (*((guint32 *)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 (ctx,
COGL_TEXTURE (test_tex),
64, 64, 128, 128);
/* Update the center half of the sub texture */
texture_data = create_update_data ();
cogl_texture_set_region (COGL_TEXTURE (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 (COGL_TEXTURE (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 (fb,
0, 0,
cogl_framebuffer_get_width (fb),
cogl_framebuffer_get_height (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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