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gtk/testsuite/gsk/scaling.c
Simon McVittie 660c6c8d6f gsk, testsuite: Avoid undefined behaviour in half_to_float_one() 
Similar to the previous commit, to avoid undefined behaviour we need
to avoid evaluating out-of-bounds shifts, even if their result is going
to ignored by being multiplied by 0 later.

Detected by running a subset of the test suite with
-Dsanitize=address,undefined on x86_64.

Signed-off-by: Simon McVittie <smcv@debian.org>
2024-07-27 20:22:09 +01:00

1060 lines
30 KiB
C
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#include <gtk/gtk.h>
#define N 10
#include "gsk/gl/fp16private.h"
struct {
const char *name;
GskRenderer * (*create_func) (void);
GskRenderer *renderer;
} renderers[] = {
#if 0
/* The GL renderer is broken, no idea why. It's suppsoed to work. */
{
"gl",
gsk_gl_renderer_new,
},
#endif
{
"cairo",
gsk_cairo_renderer_new,
},
{
"vulkan",
gsk_vulkan_renderer_new,
},
{
"ngl",
gsk_ngl_renderer_new,
},
};
typedef struct _TextureBuilder TextureBuilder;
typedef enum {
CHANNEL_UINT_8,
CHANNEL_UINT_16,
CHANNEL_FLOAT_16,
CHANNEL_FLOAT_32,
} ChannelType;
struct _TextureBuilder
{
GdkMemoryFormat format;
int width;
int height;
guchar *pixels;
gsize stride;
gsize offset;
};
static gsize
gdk_memory_format_bytes_per_pixel (GdkMemoryFormat format)
{
switch (format)
{
case GDK_MEMORY_G8:
case GDK_MEMORY_A8:
return 1;
case GDK_MEMORY_G8A8_PREMULTIPLIED:
case GDK_MEMORY_G8A8:
case GDK_MEMORY_G16:
case GDK_MEMORY_A16:
case GDK_MEMORY_A16_FLOAT:
return 2;
case GDK_MEMORY_R8G8B8:
case GDK_MEMORY_B8G8R8:
return 3;
case GDK_MEMORY_B8G8R8A8_PREMULTIPLIED:
case GDK_MEMORY_A8R8G8B8_PREMULTIPLIED:
case GDK_MEMORY_R8G8B8A8_PREMULTIPLIED:
case GDK_MEMORY_A8B8G8R8_PREMULTIPLIED:
case GDK_MEMORY_B8G8R8A8:
case GDK_MEMORY_A8R8G8B8:
case GDK_MEMORY_R8G8B8A8:
case GDK_MEMORY_A8B8G8R8:
case GDK_MEMORY_B8G8R8X8:
case GDK_MEMORY_X8R8G8B8:
case GDK_MEMORY_R8G8B8X8:
case GDK_MEMORY_X8B8G8R8:
case GDK_MEMORY_G16A16_PREMULTIPLIED:
case GDK_MEMORY_G16A16:
case GDK_MEMORY_A32_FLOAT:
return 4;
case GDK_MEMORY_R16G16B16:
case GDK_MEMORY_R16G16B16_FLOAT:
return 6;
case GDK_MEMORY_R16G16B16A16_PREMULTIPLIED:
case GDK_MEMORY_R16G16B16A16:
case GDK_MEMORY_R16G16B16A16_FLOAT_PREMULTIPLIED:
case GDK_MEMORY_R16G16B16A16_FLOAT:
return 8;
case GDK_MEMORY_R32G32B32_FLOAT:
return 12;
case GDK_MEMORY_R32G32B32A32_FLOAT_PREMULTIPLIED:
case GDK_MEMORY_R32G32B32A32_FLOAT:
return 16;
case GDK_MEMORY_N_FORMATS:
default:
g_assert_not_reached ();
return 4;
}
}
/* return the number of color channels, ignoring alpha */
static guint
gdk_memory_format_n_colors (GdkMemoryFormat format)
{
switch (format)
{
case GDK_MEMORY_R8G8B8:
case GDK_MEMORY_B8G8R8:
case GDK_MEMORY_R16G16B16:
case GDK_MEMORY_R16G16B16_FLOAT:
case GDK_MEMORY_R32G32B32_FLOAT:
case GDK_MEMORY_B8G8R8A8_PREMULTIPLIED:
case GDK_MEMORY_A8R8G8B8_PREMULTIPLIED:
case GDK_MEMORY_R8G8B8A8_PREMULTIPLIED:
case GDK_MEMORY_A8B8G8R8_PREMULTIPLIED:
case GDK_MEMORY_B8G8R8A8:
case GDK_MEMORY_A8R8G8B8:
case GDK_MEMORY_R8G8B8A8:
case GDK_MEMORY_A8B8G8R8:
case GDK_MEMORY_B8G8R8X8:
case GDK_MEMORY_X8R8G8B8:
case GDK_MEMORY_R8G8B8X8:
case GDK_MEMORY_X8B8G8R8:
case GDK_MEMORY_R16G16B16A16_PREMULTIPLIED:
case GDK_MEMORY_R16G16B16A16:
case GDK_MEMORY_R16G16B16A16_FLOAT_PREMULTIPLIED:
case GDK_MEMORY_R16G16B16A16_FLOAT:
case GDK_MEMORY_R32G32B32A32_FLOAT_PREMULTIPLIED:
case GDK_MEMORY_R32G32B32A32_FLOAT:
return 3;
case GDK_MEMORY_G8:
case GDK_MEMORY_G16:
case GDK_MEMORY_G8A8_PREMULTIPLIED:
case GDK_MEMORY_G8A8:
case GDK_MEMORY_G16A16_PREMULTIPLIED:
case GDK_MEMORY_G16A16:
return 1;
case GDK_MEMORY_A8:
case GDK_MEMORY_A16:
case GDK_MEMORY_A16_FLOAT:
case GDK_MEMORY_A32_FLOAT:
return 0;
case GDK_MEMORY_N_FORMATS:
default:
g_assert_not_reached ();
return TRUE;
}
}
static gboolean
gdk_memory_format_has_alpha (GdkMemoryFormat format)
{
switch (format)
{
case GDK_MEMORY_R8G8B8:
case GDK_MEMORY_B8G8R8:
case GDK_MEMORY_R16G16B16:
case GDK_MEMORY_R16G16B16_FLOAT:
case GDK_MEMORY_R32G32B32_FLOAT:
case GDK_MEMORY_G8:
case GDK_MEMORY_G16:
case GDK_MEMORY_B8G8R8X8:
case GDK_MEMORY_X8R8G8B8:
case GDK_MEMORY_R8G8B8X8:
case GDK_MEMORY_X8B8G8R8:
return FALSE;
case GDK_MEMORY_B8G8R8A8_PREMULTIPLIED:
case GDK_MEMORY_A8R8G8B8_PREMULTIPLIED:
case GDK_MEMORY_R8G8B8A8_PREMULTIPLIED:
case GDK_MEMORY_A8B8G8R8_PREMULTIPLIED:
case GDK_MEMORY_B8G8R8A8:
case GDK_MEMORY_A8R8G8B8:
case GDK_MEMORY_R8G8B8A8:
case GDK_MEMORY_A8B8G8R8:
case GDK_MEMORY_R16G16B16A16_PREMULTIPLIED:
case GDK_MEMORY_R16G16B16A16:
case GDK_MEMORY_R16G16B16A16_FLOAT_PREMULTIPLIED:
case GDK_MEMORY_R16G16B16A16_FLOAT:
case GDK_MEMORY_R32G32B32A32_FLOAT_PREMULTIPLIED:
case GDK_MEMORY_R32G32B32A32_FLOAT:
case GDK_MEMORY_G8A8_PREMULTIPLIED:
case GDK_MEMORY_G8A8:
case GDK_MEMORY_G16A16_PREMULTIPLIED:
case GDK_MEMORY_G16A16:
case GDK_MEMORY_A8:
case GDK_MEMORY_A16:
case GDK_MEMORY_A16_FLOAT:
case GDK_MEMORY_A32_FLOAT:
return TRUE;
case GDK_MEMORY_N_FORMATS:
default:
g_assert_not_reached ();
return TRUE;
}
}
static gboolean
gdk_memory_format_is_premultiplied (GdkMemoryFormat format)
{
switch (format)
{
case GDK_MEMORY_B8G8R8A8_PREMULTIPLIED:
case GDK_MEMORY_A8R8G8B8_PREMULTIPLIED:
case GDK_MEMORY_R8G8B8A8_PREMULTIPLIED:
case GDK_MEMORY_A8B8G8R8_PREMULTIPLIED:
case GDK_MEMORY_R16G16B16A16_PREMULTIPLIED:
case GDK_MEMORY_R16G16B16A16_FLOAT_PREMULTIPLIED:
case GDK_MEMORY_R32G32B32A32_FLOAT_PREMULTIPLIED:
case GDK_MEMORY_G8A8_PREMULTIPLIED:
case GDK_MEMORY_G16A16_PREMULTIPLIED:
case GDK_MEMORY_A8:
case GDK_MEMORY_A16:
case GDK_MEMORY_A16_FLOAT:
case GDK_MEMORY_A32_FLOAT:
return TRUE;
case GDK_MEMORY_R8G8B8:
case GDK_MEMORY_B8G8R8:
case GDK_MEMORY_R16G16B16:
case GDK_MEMORY_R16G16B16_FLOAT:
case GDK_MEMORY_R32G32B32_FLOAT:
case GDK_MEMORY_B8G8R8A8:
case GDK_MEMORY_A8R8G8B8:
case GDK_MEMORY_R8G8B8A8:
case GDK_MEMORY_A8B8G8R8:
case GDK_MEMORY_B8G8R8X8:
case GDK_MEMORY_X8R8G8B8:
case GDK_MEMORY_R8G8B8X8:
case GDK_MEMORY_X8B8G8R8:
case GDK_MEMORY_R16G16B16A16:
case GDK_MEMORY_R16G16B16A16_FLOAT:
case GDK_MEMORY_R32G32B32A32_FLOAT:
case GDK_MEMORY_G8:
case GDK_MEMORY_G8A8:
case GDK_MEMORY_G16:
case GDK_MEMORY_G16A16:
return FALSE;
case GDK_MEMORY_N_FORMATS:
default:
g_assert_not_reached ();
return FALSE;
}
}
static gboolean
gdk_memory_format_pixel_equal (GdkMemoryFormat format,
gboolean accurate,
const guchar *pixel1,
const guchar *pixel2)
{
switch (format)
{
case GDK_MEMORY_B8G8R8A8_PREMULTIPLIED:
case GDK_MEMORY_A8R8G8B8_PREMULTIPLIED:
case GDK_MEMORY_R8G8B8A8_PREMULTIPLIED:
case GDK_MEMORY_A8B8G8R8_PREMULTIPLIED:
case GDK_MEMORY_R8G8B8:
case GDK_MEMORY_B8G8R8:
case GDK_MEMORY_B8G8R8A8:
case GDK_MEMORY_A8R8G8B8:
case GDK_MEMORY_R8G8B8A8:
case GDK_MEMORY_A8B8G8R8:
case GDK_MEMORY_A8:
case GDK_MEMORY_G8:
case GDK_MEMORY_G8A8:
case GDK_MEMORY_G8A8_PREMULTIPLIED:
return memcmp (pixel1, pixel2, gdk_memory_format_bytes_per_pixel (format)) == 0;
case GDK_MEMORY_B8G8R8X8:
case GDK_MEMORY_R8G8B8X8:
return memcmp (pixel1, pixel2, 3) == 0;
case GDK_MEMORY_X8R8G8B8:
case GDK_MEMORY_X8B8G8R8:
return memcmp (pixel1 + 1, pixel2 + 1, 3) == 0;
case GDK_MEMORY_R16G16B16:
case GDK_MEMORY_R16G16B16A16:
case GDK_MEMORY_R16G16B16A16_PREMULTIPLIED:
case GDK_MEMORY_G16:
case GDK_MEMORY_G16A16:
case GDK_MEMORY_G16A16_PREMULTIPLIED:
case GDK_MEMORY_A16:
{
const guint16 *u1 = (const guint16 *) pixel1;
const guint16 *u2 = (const guint16 *) pixel2;
guint i;
for (i = 0; i < gdk_memory_format_bytes_per_pixel (format) / sizeof (guint16); i++)
{
if (!G_APPROX_VALUE (u1[i], u2[i], accurate ? 1 : 256))
return FALSE;
}
}
return TRUE;
case GDK_MEMORY_R16G16B16_FLOAT:
case GDK_MEMORY_R16G16B16A16_FLOAT:
case GDK_MEMORY_R16G16B16A16_FLOAT_PREMULTIPLIED:
case GDK_MEMORY_A16_FLOAT:
{
guint i;
for (i = 0; i < gdk_memory_format_bytes_per_pixel (format) / sizeof (guint16); i++)
{
float f1 = half_to_float_one (((guint16 *) pixel1)[i]);
float f2 = half_to_float_one (((guint16 *) pixel2)[i]);
if (!G_APPROX_VALUE (f1, f2, accurate ? 1./65535 : 1./255))
return FALSE;
}
}
return TRUE;
case GDK_MEMORY_R32G32B32_FLOAT:
case GDK_MEMORY_R32G32B32A32_FLOAT:
case GDK_MEMORY_R32G32B32A32_FLOAT_PREMULTIPLIED:
case GDK_MEMORY_A32_FLOAT:
{
const float *f1 = (const float *) pixel1;
const float *f2 = (const float *) pixel2;
guint i;
for (i = 0; i < gdk_memory_format_bytes_per_pixel (format) / sizeof (float); i++)
{
if (!G_APPROX_VALUE (f1[i], f2[i], accurate ? 1./65535 : 1./255))
return FALSE;
}
}
return TRUE;
case GDK_MEMORY_N_FORMATS:
default:
g_assert_not_reached ();
return FALSE;
}
}
static gpointer
encode_renderer_format (guint renderer,
GdkMemoryFormat format)
{
return GSIZE_TO_POINTER (format * G_N_ELEMENTS (renderers) + renderer);
}
static void
decode_renderer_format (gconstpointer data,
GskRenderer **renderer,
GdkMemoryFormat *format)
{
gsize value = GPOINTER_TO_SIZE (data);
*renderer = renderers[value % G_N_ELEMENTS (renderers)].renderer;
value /= G_N_ELEMENTS (renderers);
*format = value;
}
static void
texture_builder_init (TextureBuilder *builder,
GdkMemoryFormat format,
int width,
int height)
{
gsize extra_stride;
builder->format = format;
builder->width = width;
builder->height = height;
extra_stride = g_test_rand_bit() ? g_test_rand_int_range (0, 16) : 0;
builder->offset = g_test_rand_bit() ? g_test_rand_int_range (0, 128) : 0;
builder->stride = width * gdk_memory_format_bytes_per_pixel (format) + extra_stride;
builder->pixels = g_malloc0 (builder->offset + builder->stride * height);
}
static GdkTexture *
texture_builder_finish (TextureBuilder *builder)
{
GBytes *bytes;
GdkTexture *texture;
bytes = g_bytes_new_with_free_func (builder->pixels + builder->offset,
builder->height * builder->stride,
g_free,
builder->pixels);
texture = gdk_memory_texture_new (builder->width,
builder->height,
builder->format,
bytes,
builder->stride);
g_bytes_unref (bytes);
return texture;
}
static inline void
set_pixel_u8 (guchar *data,
int r,
int g,
int b,
int a,
gboolean premultiply,
const GdkRGBA *color)
{
if (a >= 0)
data[a] = CLAMP (color->alpha * 255.f + 0.5f, 0.f, 255.f);
if (premultiply)
{
data[r] = CLAMP (color->red * color->alpha * 255.f + 0.5f, 0.f, 255.f);
data[g] = CLAMP (color->green * color->alpha * 255.f + 0.5f, 0.f, 255.f);
data[b] = CLAMP (color->blue * color->alpha * 255.f + 0.5f, 0.f, 255.f);
}
else
{
data[r] = CLAMP (color->red * 255.f + 0.5f, 0.f, 255.f);
data[g] = CLAMP (color->green * 255.f + 0.5f, 0.f, 255.f);
data[b] = CLAMP (color->blue * 255.f + 0.5f, 0.f, 255.f);
}
}
static float
color_gray (const GdkRGBA *color)
{
return 1/3.f * (color->red + color->green + color->blue);
}
static void
texture_builder_set_pixel (TextureBuilder *builder,
int x,
int y,
const GdkRGBA *color)
{
guchar *data;
g_assert_cmpint (x, >=, 0);
g_assert_cmpint (x, <, builder->width);
g_assert_cmpint (y, >=, 0);
g_assert_cmpint (y, <, builder->height);
data = builder->pixels
+ builder->offset
+ y * builder->stride
+ x * gdk_memory_format_bytes_per_pixel (builder->format);
switch (builder->format)
{
case GDK_MEMORY_B8G8R8A8_PREMULTIPLIED:
set_pixel_u8 (data, 2, 1, 0, 3, TRUE, color);
break;
case GDK_MEMORY_A8R8G8B8_PREMULTIPLIED:
set_pixel_u8 (data, 1, 2, 3, 0, TRUE, color);
break;
case GDK_MEMORY_R8G8B8A8_PREMULTIPLIED:
set_pixel_u8 (data, 0, 1, 2, 3, TRUE, color);
break;
case GDK_MEMORY_A8B8G8R8_PREMULTIPLIED:
set_pixel_u8 (data, 3, 2, 1, 0, TRUE, color);
break;
case GDK_MEMORY_B8G8R8A8:
set_pixel_u8 (data, 2, 1, 0, 3, FALSE, color);
break;
case GDK_MEMORY_A8R8G8B8:
set_pixel_u8 (data, 1, 2, 3, 0, FALSE, color);
break;
case GDK_MEMORY_R8G8B8A8:
set_pixel_u8 (data, 0, 1, 2, 3, FALSE, color);
break;
case GDK_MEMORY_A8B8G8R8:
set_pixel_u8 (data, 3, 2, 1, 0, FALSE, color);
break;
case GDK_MEMORY_B8G8R8X8:
set_pixel_u8 (data, 2, 1, 0, -1, TRUE, color);
break;
case GDK_MEMORY_X8R8G8B8:
set_pixel_u8 (data, 1, 2, 3, -1, TRUE, color);
break;
case GDK_MEMORY_R8G8B8X8:
set_pixel_u8 (data, 0, 1, 2, -1, TRUE, color);
break;
case GDK_MEMORY_X8B8G8R8:
set_pixel_u8 (data, 3, 2, 1, -1, TRUE, color);
break;
case GDK_MEMORY_R8G8B8:
set_pixel_u8 (data, 0, 1, 2, -1, TRUE, color);
break;
case GDK_MEMORY_B8G8R8:
set_pixel_u8 (data, 2, 1, 0, -1, TRUE, color);
break;
case GDK_MEMORY_R16G16B16:
{
guint16 pixels[3] = {
CLAMP (color->red * color->alpha * 65535.f + 0.5f, 0, 65535.f),
CLAMP (color->green * color->alpha * 65535.f + 0.5f, 0, 65535.f),
CLAMP (color->blue * color->alpha * 65535.f + 0.5f, 0, 65535.f),
};
memcpy (data, pixels, 3 * sizeof (guint16));
}
break;
case GDK_MEMORY_R16G16B16A16_PREMULTIPLIED:
{
guint16 pixels[4] = {
CLAMP (color->red * color->alpha * 65535.f + 0.5f, 0, 65535.f),
CLAMP (color->green * color->alpha * 65535.f + 0.5f, 0, 65535.f),
CLAMP (color->blue * color->alpha * 65535.f + 0.5f, 0, 65535.f),
CLAMP (color->alpha * 65535.f + 0.5f, 0, 65535.f),
};
memcpy (data, pixels, 4 * sizeof (guint16));
}
break;
case GDK_MEMORY_R16G16B16A16:
{
guint16 pixels[4] = {
CLAMP (color->red * 65535.f + 0.5f, 0, 65535.f),
CLAMP (color->green * 65535.f + 0.5f, 0, 65535.f),
CLAMP (color->blue * 65535.f + 0.5f, 0, 65535.f),
CLAMP (color->alpha * 65535.f + 0.5f, 0, 65535.f),
};
memcpy (data, pixels, 4 * sizeof (guint16));
}
break;
case GDK_MEMORY_R16G16B16_FLOAT:
{
guint16 pixels[3] = {
float_to_half_one (color->red * color->alpha),
float_to_half_one (color->green * color->alpha),
float_to_half_one (color->blue * color->alpha)
};
memcpy (data, pixels, 3 * sizeof (guint16));
}
break;
case GDK_MEMORY_R16G16B16A16_FLOAT_PREMULTIPLIED:
{
guint16 pixels[4] = {
float_to_half_one (color->red * color->alpha),
float_to_half_one (color->green * color->alpha),
float_to_half_one (color->blue * color->alpha),
float_to_half_one (color->alpha)
};
memcpy (data, pixels, 4 * sizeof (guint16));
}
break;
case GDK_MEMORY_R16G16B16A16_FLOAT:
{
guint16 pixels[4] = {
float_to_half_one (color->red),
float_to_half_one (color->green),
float_to_half_one (color->blue),
float_to_half_one (color->alpha)
};
memcpy (data, pixels, 4 * sizeof (guint16));
}
break;
case GDK_MEMORY_R32G32B32_FLOAT:
{
float pixels[3] = {
color->red * color->alpha,
color->green * color->alpha,
color->blue * color->alpha
};
memcpy (data, pixels, 3 * sizeof (float));
}
break;
case GDK_MEMORY_R32G32B32A32_FLOAT_PREMULTIPLIED:
{
float pixels[4] = {
color->red * color->alpha,
color->green * color->alpha,
color->blue * color->alpha,
color->alpha
};
memcpy (data, pixels, 4 * sizeof (float));
}
break;
case GDK_MEMORY_R32G32B32A32_FLOAT:
{
float pixels[4] = {
color->red,
color->green,
color->blue,
color->alpha
};
memcpy (data, pixels, 4 * sizeof (float));
}
break;
case GDK_MEMORY_G8A8_PREMULTIPLIED:
{
data[0] = CLAMP (color_gray (color) * color->alpha * 255.f + 0.5f, 0.f, 255.f);
data[1] = CLAMP (color->alpha * 255.f + 0.5f, 0.f, 255.f);
}
break;
case GDK_MEMORY_G8A8:
{
data[0] = CLAMP (color_gray (color) * 255.f + 0.5f, 0.f, 255.f);
data[1] = CLAMP (color->alpha * 255.f + 0.5f, 0.f, 255.f);
}
break;
case GDK_MEMORY_G8:
{
*data = CLAMP (color_gray (color) * color->alpha * 255.f + 0.5f, 0.f, 255.f);
}
break;
case GDK_MEMORY_G16A16_PREMULTIPLIED:
{
guint16 pixels[2] = {
CLAMP (color_gray (color) * color->alpha * 65535.f + 0.5f, 0.f, 65535.f),
CLAMP (color->alpha * 65535.f + 0.5f, 0.f, 65535.f),
};
memcpy (data, pixels, 2 * sizeof (guint16));
}
break;
case GDK_MEMORY_G16A16:
{
guint16 pixels[2] = {
CLAMP (color_gray (color) * 65535.f + 0.5f, 0.f, 65535.f),
CLAMP (color->alpha * 65535.f + 0.5f, 0.f, 65535.f),
};
memcpy (data, pixels, 2 * sizeof (guint16));
}
break;
case GDK_MEMORY_G16:
{
guint16 pixel = CLAMP (color_gray (color) * color->alpha * 65535.f + 0.5f, 0.f, 65535.f);
memcpy (data, &pixel, sizeof (guint16));
}
break;
case GDK_MEMORY_A8:
{
*data = CLAMP (color->alpha * 255.f + 0.5f, 0.f, 255.f);
}
break;
case GDK_MEMORY_A16:
{
guint16 pixel = CLAMP (color->alpha * 65535.f, 0.f, 65535.f);
memcpy (data, &pixel, sizeof (guint16));
}
break;
case GDK_MEMORY_A16_FLOAT:
{
guint16 pixel = float_to_half_one (color->alpha);
memcpy (data, &pixel, sizeof (guint16));
}
break;
case GDK_MEMORY_A32_FLOAT:
{
memcpy (data, &color->alpha, sizeof (float));
}
break;
case GDK_MEMORY_N_FORMATS:
default:
g_assert_not_reached ();
break;
}
}
static void
texture_builder_fill (TextureBuilder *builder,
const GdkRGBA *color)
{
int x, y;
for (y = 0; y < builder->height; y++)
for (x = 0; x < builder->width; x++)
texture_builder_set_pixel (builder, x, y, color);
}
static void
compare_textures (GdkTexture *texture1,
GdkTexture *texture2,
gboolean accurate_compare)
{
GdkTextureDownloader *downloader1, *downloader2;
GBytes *bytes1, *bytes2;
gsize stride1, stride2, bpp;
const guchar *data1, *data2;
int width, height, x, y;
GdkMemoryFormat format;
g_assert_cmpint (gdk_texture_get_width (texture1), ==, gdk_texture_get_width (texture2));
g_assert_cmpint (gdk_texture_get_height (texture1), ==, gdk_texture_get_height (texture2));
g_assert_cmpint (gdk_texture_get_format (texture1), ==, gdk_texture_get_format (texture2));
format = gdk_texture_get_format (texture1);
bpp = gdk_memory_format_bytes_per_pixel (format);
width = gdk_texture_get_width (texture1);
height = gdk_texture_get_height (texture1);
downloader1 = gdk_texture_downloader_new (texture1);
gdk_texture_downloader_set_format (downloader1, format);
bytes1 = gdk_texture_downloader_download_bytes (downloader1, &stride1);
g_assert_cmpint (stride1, >=, bpp * width);
g_assert_nonnull (bytes1);
gdk_texture_downloader_free (downloader1);
downloader2 = gdk_texture_downloader_new (texture2);
gdk_texture_downloader_set_format (downloader2, format);
bytes2 = gdk_texture_downloader_download_bytes (downloader2, &stride2);
g_assert_cmpint (stride2, >=, bpp * width);
g_assert_nonnull (bytes2);
gdk_texture_downloader_free (downloader2);
data1 = g_bytes_get_data (bytes1, NULL);
data2 = g_bytes_get_data (bytes2, NULL);
for (y = 0; y < height; y++)
{
for (x = 0; x < width; x++)
{
g_assert_true (gdk_memory_format_pixel_equal (format, accurate_compare, data1 + bpp * x, data2 + bpp * x));
}
data1 += stride1;
data2 += stride2;
}
g_bytes_unref (bytes2);
g_bytes_unref (bytes1);
}
#if 0
static GdkTexture *
ensure_texture_format (GdkTexture *texture,
GdkMemoryFormat format)
{
GdkTextureDownloader *downloader;
GdkTexture *result;
GBytes *bytes;
gsize stride;
if (gdk_texture_get_format (texture) == format)
return texture;
downloader = gdk_texture_downloader_new (texture);
gdk_texture_downloader_set_format (downloader, format);
bytes = gdk_texture_downloader_download_bytes (downloader, &stride);
gdk_texture_downloader_free (downloader);
result = gdk_memory_texture_new (gdk_texture_get_width (texture),
gdk_texture_get_height (texture),
format,
bytes,
stride);
g_bytes_unref (bytes);
g_object_unref (texture);
return result;
}
#endif
static void
color_make_opaque (GdkRGBA *result,
const GdkRGBA *color)
{
result->red *= color->alpha;
result->green *= color->alpha;
result->blue *= color->alpha;
result->alpha = 1.0f;
}
static void
color_make_gray (GdkRGBA *result,
const GdkRGBA *color)
{
result->red = (color->red + color->green + color->blue) / 3.0f;
result->green = result->red;
result->blue = result->red;
result->alpha = color->alpha;
}
static void
color_make_white (GdkRGBA *result,
const GdkRGBA *color)
{
result->red = 1.0f;
result->green = 1.0f;
result->blue = 1.0f;
result->alpha = color->alpha;
}
/* Generate colors so that premultiplying will result in values in steps of 1/15th.
* Also make sure that an averaged gray value fits in that range. */
static void
create_random_color (GdkRGBA *color)
{
int r, g, b;
do
{
r = g_test_rand_int_range (0, 6);
g = g_test_rand_int_range (0, 6);
b = g_test_rand_int_range (0, 6);
}
while ((r + g + b) % 3 != 0);
color->red = r / 5.f;
color->green = g / 5.f;
color->blue = b / 5.f;
color->alpha = g_test_rand_int_range (0, 4) / 3.f;
}
static void
create_random_color_for_format (GdkRGBA *color,
GdkMemoryFormat format)
{
/* non-premultiplied can represet GdkRGBA (1, 1, 1, 0)
* but premultiplied cannot.
* Premultiplied will always represent this as (0, 0, 0, 0)
*/
do
{
create_random_color (color);
}
while (color->alpha == 0 &&
gdk_memory_format_is_premultiplied (format));
/* If the format can't handle alpha, make things opaque
*/
if (!gdk_memory_format_has_alpha (format))
color_make_opaque (color, color);
/* If the format has fewer color channels than the
* target, make sure the colors get adjusted.
*/
if (gdk_memory_format_n_colors (format) == 1)
color_make_gray (color, color);
else if (gdk_memory_format_n_colors (format) == 0)
color_make_white (color, color);
}
static GdkTexture *
create_solid_color_texture (GdkMemoryFormat format,
int width,
int height,
const GdkRGBA *color)
{
TextureBuilder builder;
texture_builder_init (&builder, format, width, height);
texture_builder_fill (&builder, color);
return texture_builder_finish (&builder);
}
/* randomly creates 4 colors with values that are multiples
* of 16, so that averaging the colors works without rounding
* errors, and then creates a stipple pattern like this:
*
* 1 2 1 2 1 2 ...
* 3 4 3 4 3 4
* 1 2 1 2 1 2
* 3 4 3 4 3 4
* 1 2 1 2 1 2
* 3 4 3 4 3 4
* ⋮
*/
static GdkTexture *
create_stipple_texture (GdkMemoryFormat format,
gsize width,
gsize height,
GdkRGBA *average)
{
TextureBuilder builder;
GdkTexture *texture;
int x, y;
GdkRGBA colors[2][2];
*average = (GdkRGBA) { 0, 0, 0, 0 };
for (y = 0; y < 2; y++)
{
for (x = 0; x < 2; x++)
{
create_random_color_for_format (&colors[x][y], format);
if (gdk_memory_format_has_alpha (format))
colors[x][y].alpha *= 16.f/17.f;
else
{
colors[x][y].red *= 16.f/17.f;
colors[x][y].green *= 16.f/17.f;
colors[x][y].blue *= 16.f/17.f;
}
average->red += colors[x][y].red * colors[x][y].alpha;
average->green += colors[x][y].green * colors[x][y].alpha;
average->blue += colors[x][y].blue * colors[x][y].alpha;
average->alpha += colors[x][y].alpha;
}
}
average->red /= average->alpha;
average->green /= average->alpha;
average->blue /= average->alpha;
average->alpha /= 4.0f;
texture_builder_init (&builder, format, width, height);
for (y = 0; y < height; y++)
{
for (x = 0; x < width; x++)
{
texture_builder_set_pixel (&builder, x, y, &colors[x % 2][y % 2]);
}
}
texture = texture_builder_finish (&builder);
return texture;
}
static void
test_linear_filtering (gconstpointer data,
gsize width,
gsize height)
{
GdkMemoryFormat format;
GskRenderer *renderer;
GdkTexture *input, *output, *expected;
GskRenderNode *node;
GdkRGBA average_color;
decode_renderer_format (data, &renderer, &format);
input = create_stipple_texture (format, width, height, &average_color);
node = gsk_texture_scale_node_new (input, &GRAPHENE_RECT_INIT (0, 0, width / 2, height / 2), GSK_SCALING_FILTER_LINEAR);
output = gsk_renderer_render_texture (renderer, node, NULL);
expected = create_solid_color_texture (gdk_texture_get_format (output), width / 2, height / 2, &average_color);
compare_textures (expected, output, FALSE);
g_object_unref (expected);
g_object_unref (output);
gsk_render_node_unref (node);
g_object_unref (input);
}
static void
test_mipmaps (gconstpointer data)
{
GdkMemoryFormat format;
GskRenderer *renderer;
GdkTexture *input, *output, *expected;
GskRenderNode *node;
GdkRGBA average_color;
decode_renderer_format (data, &renderer, &format);
input = create_stipple_texture (format, 2, 2, &average_color);
node = gsk_texture_scale_node_new (input, &GRAPHENE_RECT_INIT (0, 0, 1, 1), GSK_SCALING_FILTER_TRILINEAR);
output = gsk_renderer_render_texture (renderer, node, NULL);
expected = create_solid_color_texture (gdk_texture_get_format (output), 1, 1, &average_color);
compare_textures (expected, output, FALSE);
g_object_unref (expected);
g_object_unref (output);
gsk_render_node_unref (node);
g_object_unref (input);
}
static void
test_linear_filtering_2x2 (gconstpointer data)
{
test_linear_filtering (data, 2, 2);
}
static void
test_linear_filtering_512x512 (gconstpointer data)
{
test_linear_filtering (data, 512, 512);
}
static void
add_format_test (const char *name,
GTestDataFunc func)
{
GdkMemoryFormat format;
gsize renderer;
GEnumClass *enum_class;
enum_class = g_type_class_ref (GDK_TYPE_MEMORY_FORMAT);
for (renderer = 0; renderer < G_N_ELEMENTS (renderers); renderer++)
{
if (renderers[renderer].renderer == NULL)
continue;
for (format = 0; format < GDK_MEMORY_N_FORMATS; format++)
{
char *test_name = g_strdup_printf ("%s/%s/%s",
name,
renderers[renderer].name,
g_enum_get_value (enum_class, format)->value_nick);
g_test_add_data_func_full (test_name, encode_renderer_format (renderer, format), func, NULL);
g_free (test_name);
}
}
}
static void
create_renderers (void)
{
GError *error = NULL;
gsize i;
for (i = 0; i < G_N_ELEMENTS (renderers); i++)
{
renderers[i].renderer = renderers[i].create_func ();
if (!gsk_renderer_realize_for_display (renderers[i].renderer, gdk_display_get_default (), &error))
{
g_test_message ("Could not realize %s renderer: %s", renderers[i].name, error->message);
g_clear_error (&error);
g_clear_object (&renderers[i].renderer);
}
}
}
static void
destroy_renderers (void)
{
gsize i;
for (i = 0; i < G_N_ELEMENTS (renderers); i++)
{
if (renderers[i].renderer == NULL)
continue;
gsk_renderer_unrealize (renderers[i].renderer);
g_clear_object (&renderers[i].renderer);
}
}
int
main (int argc, char *argv[])
{
int result;
gtk_test_init (&argc, &argv, NULL);
create_renderers ();
add_format_test ("/scaling/linear-filtering", test_linear_filtering_2x2);
add_format_test ("/scaling/linear-filtering-large", test_linear_filtering_512x512);
add_format_test ("/scaling/mipmap", test_mipmaps);
result = g_test_run ();
/* So the context gets actually destroyed */
gdk_gl_context_clear_current ();
destroy_renderers ();
return result;
}
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