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mutter/tests/conform/test-premult.c
Robert Bragg af7398788a remove internal_format and redundant error arguments 
Texture allocation is now consistently handled lazily such that the
internal format can now be controlled using
cogl_texture_set_components() and cogl_texture_set_premultiplied()
before allocating the texture with cogl_texture_allocate(). This means
that the internal_format arguments to texture constructors are now
redundant and since most of the texture constructors now can't ever fail
the error arguments are also redundant. This now means we no longer
use CoglPixelFormat in the public api for describing the internal format
of textures which had been bad solution originally due to how specific
CoglPixelFormat is which is missleading when we don't support such
explicit control over the internal format.

Reviewed-by: Neil Roberts <neil@linux.intel.com>
(cherry picked from commit 99a53c82e9ab0a1e5ee35941bf83dc334b1fbe87)

Note: there are numerous API changes for functions currently marked
as 'unstable' which we don't think are in use by anyone depending on
a stable 1.x api. Compared to the original patch though this avoids
changing the cogl_texture_rectangle_new_with_size() api which we know
is used by Mutter.
2014-01-09 15:49:47 +00:00

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#include <cogl/cogl.h>
#include <string.h>
#include "test-utils.h"
#define QUAD_WIDTH 32
#define RED 0
#define GREEN 1
#define BLUE 2
#define ALPHA 3
#define MASK_RED(COLOR) ((COLOR & 0xff000000) >> 24)
#define MASK_GREEN(COLOR) ((COLOR & 0xff0000) >> 16)
#define MASK_BLUE(COLOR) ((COLOR & 0xff00) >> 8)
#define MASK_ALPHA(COLOR) (COLOR & 0xff)
typedef enum _MakeTextureFlags
{
TEXTURE_FLAG_SET_PREMULTIPLIED = 1,
TEXTURE_FLAG_SET_UNPREMULTIPLIED = 1<<1,
} MakeTextureFlags;
static guchar *
gen_tex_data (uint32_t color)
{
guchar *tex_data, *p;
uint8_t r = MASK_RED (color);
uint8_t g = MASK_GREEN (color);
uint8_t b = MASK_BLUE (color);
uint8_t a = MASK_ALPHA (color);
tex_data = g_malloc (QUAD_WIDTH * QUAD_WIDTH * 4);
for (p = tex_data + QUAD_WIDTH * QUAD_WIDTH * 4; p > tex_data;)
{
*(--p) = a;
*(--p) = b;
*(--p) = g;
*(--p) = r;
}
return tex_data;
}
static CoglTexture *
make_texture (uint32_t color,
CoglPixelFormat src_format,
MakeTextureFlags flags)
{
CoglTexture2D *tex_2d;
guchar *tex_data = gen_tex_data (color);
CoglBitmap *bmp = cogl_bitmap_new_for_data (test_ctx,
QUAD_WIDTH,
QUAD_WIDTH,
src_format,
QUAD_WIDTH * 4,
tex_data);
tex_2d = cogl_texture_2d_new_from_bitmap (bmp);
if (flags & TEXTURE_FLAG_SET_PREMULTIPLIED)
cogl_texture_set_premultiplied (tex_2d, TRUE);
else if (flags & TEXTURE_FLAG_SET_UNPREMULTIPLIED)
cogl_texture_set_premultiplied (tex_2d, FALSE);
cogl_object_unref (bmp);
g_free (tex_data);
return tex_2d;
}
static void
set_region (CoglTexture *tex,
uint32_t color,
CoglPixelFormat format)
{
guchar *tex_data = gen_tex_data (color);
cogl_texture_set_region (tex,
0, 0, /* src x, y */
0, 0, /* dst x, y */
QUAD_WIDTH, QUAD_WIDTH, /* dst width, height */
QUAD_WIDTH, QUAD_WIDTH, /* src width, height */
format,
0, /* auto compute row stride */
tex_data);
}
static void
check_texture (CoglPipeline *pipeline,
CoglHandle material,
int x,
int y,
CoglTexture *tex,
uint32_t expected_result)
{
/* Legacy */
cogl_push_framebuffer (test_fb);
cogl_material_set_layer (material, 0, tex);
cogl_set_source (material);
cogl_rectangle (x * QUAD_WIDTH,
y * QUAD_WIDTH,
x * QUAD_WIDTH + QUAD_WIDTH,
y * QUAD_WIDTH + QUAD_WIDTH);
test_utils_check_pixel (test_fb, x * QUAD_WIDTH + QUAD_WIDTH / 2, y * QUAD_WIDTH + QUAD_WIDTH / 2, expected_result);
cogl_pop_framebuffer ();
/* New API */
cogl_pipeline_set_layer_texture (pipeline, 0, tex);
cogl_framebuffer_draw_rectangle (test_fb, pipeline,
x * QUAD_WIDTH,
y * QUAD_WIDTH,
x * QUAD_WIDTH + QUAD_WIDTH,
y * QUAD_WIDTH + QUAD_WIDTH);
test_utils_check_pixel (test_fb, x * QUAD_WIDTH + QUAD_WIDTH / 2, y * QUAD_WIDTH + QUAD_WIDTH / 2, expected_result);
}
void
test_premult (void)
{
CoglPipeline *pipeline;
CoglHandle material;
CoglTexture *tex;
cogl_framebuffer_orthographic (test_fb, 0, 0,
cogl_framebuffer_get_width (test_fb),
cogl_framebuffer_get_height (test_fb),
-1,
100);
cogl_framebuffer_clear4f (test_fb,
COGL_BUFFER_BIT_COLOR,
1.0f, 1.0f, 1.0f, 1.0f);
/* Legacy */
material = cogl_material_new ();
cogl_material_set_blend (material,
"RGBA = ADD (SRC_COLOR, 0)", NULL);
cogl_material_set_layer_combine (material, 0,
"RGBA = REPLACE (TEXTURE)", NULL);
/* New API */
pipeline = cogl_pipeline_new (test_ctx);
cogl_pipeline_set_blend (pipeline,
"RGBA = ADD (SRC_COLOR, 0)", NULL);
cogl_pipeline_set_layer_combine (pipeline, 0,
"RGBA = REPLACE (TEXTURE)", NULL);
/* If the user explicitly specifies an unmultiplied internal format then
* Cogl shouldn't automatically premultiply the given texture data... */
if (cogl_test_verbose ())
g_print ("make_texture (0xff00ff80, "
"src = RGBA_8888, internal = RGBA_8888)\n");
tex = make_texture (0xff00ff80,
COGL_PIXEL_FORMAT_RGBA_8888, /* src format */
TEXTURE_FLAG_SET_UNPREMULTIPLIED);
check_texture (pipeline, material, 0, 0, /* position */
tex,
0xff00ff80); /* expected */
/* If the user explicitly requests a premultiplied internal format and
* gives unmultiplied src data then Cogl should always premultiply that
* for us */
if (cogl_test_verbose ())
g_print ("make_texture (0xff00ff80, "
"src = RGBA_8888, internal = RGBA_8888_PRE)\n");
tex = make_texture (0xff00ff80,
COGL_PIXEL_FORMAT_RGBA_8888, /* src format */
TEXTURE_FLAG_SET_PREMULTIPLIED);
check_texture (pipeline, material, 1, 0, /* position */
tex,
0x80008080); /* expected */
/* If the user doesn't explicitly declare that the texture is premultiplied
* then Cogl should assume it is by default should premultiply
* unpremultiplied texture data...
*/
if (cogl_test_verbose ())
g_print ("make_texture (0xff00ff80, "
"src = RGBA_8888, internal = ANY)\n");
tex = make_texture (0xff00ff80,
COGL_PIXEL_FORMAT_RGBA_8888, /* src format */
0); /* default premultiplied status */
check_texture (pipeline, material, 2, 0, /* position */
tex,
0x80008080); /* expected */
/* If the user requests a premultiplied internal texture format and supplies
* premultiplied source data, Cogl should never modify that source data...
*/
if (cogl_test_verbose ())
g_print ("make_texture (0x80008080, "
"src = RGBA_8888_PRE, "
"internal = RGBA_8888_PRE)\n");
tex = make_texture (0x80008080,
COGL_PIXEL_FORMAT_RGBA_8888_PRE, /* src format */
TEXTURE_FLAG_SET_PREMULTIPLIED);
check_texture (pipeline, material, 3, 0, /* position */
tex,
0x80008080); /* expected */
/* If the user requests an unmultiplied internal texture format, but
* supplies premultiplied source data, then Cogl should always
* un-premultiply the source data... */
if (cogl_test_verbose ())
g_print ("make_texture (0x80008080, "
"src = RGBA_8888_PRE, internal = RGBA_8888)\n");
tex = make_texture (0x80008080,
COGL_PIXEL_FORMAT_RGBA_8888_PRE, /* src format */
TEXTURE_FLAG_SET_UNPREMULTIPLIED);
check_texture (pipeline, material, 4, 0, /* position */
tex,
0xff00ff80); /* expected */
/* If the user allows any internal texture format and provides premultipled
* source data then by default Cogl shouldn't modify the source data...
* (In the future there will be additional Cogl API to control this
* behaviour) */
if (cogl_test_verbose ())
g_print ("make_texture (0x80008080, "
"src = RGBA_8888_PRE, internal = ANY)\n");
tex = make_texture (0x80008080,
COGL_PIXEL_FORMAT_RGBA_8888_PRE, /* src format */
0); /* default premultiplied status */
check_texture (pipeline, material, 5, 0, /* position */
tex,
0x80008080); /* expected */
/*
* Test cogl_texture_set_region() ....
*/
if (cogl_test_verbose ())
g_print ("make_texture (0xDEADBEEF, "
"src = RGBA_8888, internal = RGBA_8888)\n");
tex = make_texture (0xDEADBEEF,
COGL_PIXEL_FORMAT_RGBA_8888, /* src format */
TEXTURE_FLAG_SET_UNPREMULTIPLIED);
if (cogl_test_verbose ())
g_print ("set_region (0xff00ff80, RGBA_8888)\n");
set_region (tex, 0xff00ff80, COGL_PIXEL_FORMAT_RGBA_8888);
check_texture (pipeline, material, 6, 0, /* position */
tex,
0xff00ff80); /* expected */
/* Updating a texture region for an unmultiplied texture using premultiplied
* region data should result in Cogl unmultiplying the given region data...
*/
if (cogl_test_verbose ())
g_print ("make_texture (0xDEADBEEF, "
"src = RGBA_8888, internal = RGBA_8888)\n");
tex = make_texture (0xDEADBEEF,
COGL_PIXEL_FORMAT_RGBA_8888, /* src format */
TEXTURE_FLAG_SET_UNPREMULTIPLIED);
if (cogl_test_verbose ())
g_print ("set_region (0x80008080, RGBA_8888_PRE)\n");
set_region (tex, 0x80008080, COGL_PIXEL_FORMAT_RGBA_8888_PRE);
check_texture (pipeline, material, 7, 0, /* position */
tex,
0xff00ff80); /* expected */
if (cogl_test_verbose ())
g_print ("make_texture (0xDEADBEEF, "
"src = RGBA_8888_PRE, "
"internal = RGBA_8888_PRE)\n");
tex = make_texture (0xDEADBEEF,
COGL_PIXEL_FORMAT_RGBA_8888_PRE, /* src format */
TEXTURE_FLAG_SET_PREMULTIPLIED);
if (cogl_test_verbose ())
g_print ("set_region (0x80008080, RGBA_8888_PRE)\n");
set_region (tex, 0x80008080, COGL_PIXEL_FORMAT_RGBA_8888_PRE);
check_texture (pipeline, material, 8, 0, /* position */
tex,
0x80008080); /* expected */
/* Updating a texture region for a premultiplied texture using unmultiplied
* region data should result in Cogl premultiplying the given region data...
*/
if (cogl_test_verbose ())
g_print ("make_texture (0xDEADBEEF, "
"src = RGBA_8888_PRE, "
"internal = RGBA_8888_PRE)\n");
tex = make_texture (0xDEADBEEF,
COGL_PIXEL_FORMAT_RGBA_8888_PRE, /* src format */
TEXTURE_FLAG_SET_PREMULTIPLIED);
if (cogl_test_verbose ())
g_print ("set_region (0xff00ff80, RGBA_8888)\n");
set_region (tex, 0xff00ff80, COGL_PIXEL_FORMAT_RGBA_8888);
check_texture (pipeline, material, 9, 0, /* position */
tex,
0x80008080); /* expected */
if (cogl_test_verbose ())
g_print ("OK\n");
}
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