static int
unmap_image(lua_State *L)
{
cairo_surface_t **obj = luaL_checkudata(L, 1, OOCAIRO_MT_NAME_SURFACE);
cairo_surface_t **img = luaL_checkudata(L, 2, OOCAIRO_MT_NAME_SURFACE);
/* unmap_image will drop a reference, so we need a new reference for it */
cairo_surface_reference(*img);
cairo_surface_unmap_image(*obj, *img);
return 0;
}
static cairo_test_status_t
draw (cairo_t *cr, int width, int height)
{
cairo_surface_t *surface;
cairo_surface_t *image;
cairo_surface_t *subimage;
cairo_rectangle_int_t extents;
cairo_t *cr2;
extents.x = extents.y = 10;
extents.width = WIDTH - 20;
extents.height = HEIGHT - 20;
/* We use a similar surface to have way smaller ref images */
surface = cairo_surface_create_similar (cairo_get_target (cr),
CAIRO_CONTENT_COLOR_ALPHA,
WIDTH, HEIGHT);
/* First we have to defeat xcb's deferred clear */
cr2 = cairo_create (surface);
cairo_test_paint_checkered (cr2);
cairo_destroy (cr2);
/* Get us an image surface with a non-natural stride */
image = cairo_image_surface_create (CAIRO_FORMAT_ARGB32,
WIDTH, HEIGHT);
subimage = cairo_surface_map_to_image (image, &extents);
/* Paint the subimage to the similar surface and trigger the big upload */
cr2 = cairo_create (surface);
cairo_set_source_surface (cr2, subimage, 0, 0);
cairo_paint (cr2);
cairo_destroy (cr2);
/* Finally we make sure that errors aren't lost. */
cairo_surface_unmap_image (image, subimage);
cairo_set_source_surface (cr, surface, 0, 0);
cairo_paint (cr);
cairo_surface_destroy (image);
cairo_surface_destroy (surface);
return CAIRO_TEST_SUCCESS;
}
/*
* If we ever support GL/D3D surfaces, we will have to
* filter on these surface types
* For now, everything is CPU-rendered, so map_to_image
* will give us the best possible backend for our blur
*/
void
eventd_nd_draw_blur_surface(cairo_t *cr, gint blur)
{
cairo_surface_t *target, *surface;
target = cairo_get_target(cr);
surface = cairo_surface_map_to_image(target, NULL);
if ( cairo_surface_status(surface) != CAIRO_STATUS_SUCCESS )
return;
gint width, height, stride, channels;
guint8 *data, *tmp;
switch ( cairo_image_surface_get_format(surface) )
{
case CAIRO_FORMAT_ARGB32:
case CAIRO_FORMAT_RGB24:
channels = 4;
break;
case CAIRO_FORMAT_A8:
channels = 1;
break;
default:
goto fail;
}
width = cairo_image_surface_get_width(surface);
height = cairo_image_surface_get_height(surface);
data = cairo_image_surface_get_data(surface);
stride = cairo_image_surface_get_stride(surface);
tmp = g_alloca(stride * height * sizeof(guint8));
_eventd_nd_draw_blur_gauss(data, tmp, blur, 3 /* number of passes */, width, height, stride, channels);
cairo_surface_mark_dirty(surface);
fail:
cairo_surface_unmap_image(target, surface);
}
/* This is always called with the paint context current */
void
gdk_gl_texture_from_surface (cairo_surface_t *surface,
cairo_region_t *region)
{
GdkGLContext *paint_context;
cairo_surface_t *image;
double device_x_offset, device_y_offset;
cairo_rectangle_int_t rect, e;
int n_rects, i;
GdkWindow *window;
int unscaled_window_height;
unsigned int texture_id;
int window_scale;
double sx, sy;
float umax, vmax;
gboolean use_texture_rectangle;
guint target;
paint_context = gdk_gl_context_get_current ();
if ((_gdk_gl_flags & GDK_GL_SOFTWARE_DRAW_SURFACE) == 0 &&
paint_context &&
GDK_GL_CONTEXT_GET_CLASS (paint_context)->texture_from_surface &&
GDK_GL_CONTEXT_GET_CLASS (paint_context)->texture_from_surface (paint_context, surface, region))
return;
/* Software fallback */
use_texture_rectangle = gdk_gl_context_use_texture_rectangle (paint_context);
window = gdk_gl_context_get_window (paint_context);
window_scale = gdk_window_get_scale_factor (window);
gdk_window_get_unscaled_size (window, NULL, &unscaled_window_height);
sx = sy = 1;
cairo_surface_get_device_scale (window->current_paint.surface, &sx, &sy);
cairo_surface_get_device_offset (surface,
&device_x_offset, &device_y_offset);
glGenTextures (1, &texture_id);
if (use_texture_rectangle)
target = GL_TEXTURE_RECTANGLE_ARB;
else
target = GL_TEXTURE_2D;
glBindTexture (target, texture_id);
glEnable (GL_SCISSOR_TEST);
glTexParameteri (target, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glTexParameteri (target, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
glTexParameteri (target, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
glTexParameteri (target, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
n_rects = cairo_region_num_rectangles (region);
#define FLIP_Y(_y) (unscaled_window_height - (_y))
for (i = 0; i < n_rects; i++)
{
cairo_region_get_rectangle (region, i, &rect);
glScissor (rect.x * window_scale, FLIP_Y ((rect.y + rect.height) * window_scale),
rect.width * window_scale, rect.height * window_scale);
e = rect;
e.x *= sx;
e.y *= sy;
e.x += (int)device_x_offset;
e.y += (int)device_y_offset;
e.width *= sx;
e.height *= sy;
image = cairo_surface_map_to_image (surface, &e);
gdk_gl_context_upload_texture (paint_context, image, e.width, e.height, target);
cairo_surface_unmap_image (surface, image);
if (use_texture_rectangle)
{
umax = rect.width * sx;
vmax = rect.height * sy;
}
else
{
umax = 1.0;
vmax = 1.0;
}
{
GdkTexturedQuad quad = {
rect.x * window_scale, FLIP_Y(rect.y * window_scale),
(rect.x + rect.width) * window_scale, FLIP_Y((rect.y + rect.height) * window_scale),
0, 0,
umax, vmax,
};
/* We don't want to combine the quads here, because they have different textures.
* And we don't want to upload the unused source areas to make it one texture. */
gdk_gl_texture_quads (paint_context, target, 1, &quad);
}
}
#undef FLIP_Y
glDisable (GL_SCISSOR_TEST);
glDeleteTextures (1, &texture_id);
}
