C++ pixman_image_create_bits函数代码示例

void
bench_composite (const char *testname,
                 int         src_fmt,
                 int         src_flags,
                 int         op,
                 int         mask_fmt,
                 int         mask_flags,
                 int         dst_fmt,
                 double      npix)
{
    pixman_image_t *                src_img;
    pixman_image_t *                dst_img;
    pixman_image_t *                mask_img;
    pixman_image_t *                xsrc_img;
    pixman_image_t *                xdst_img;
    pixman_image_t *                xmask_img;
    double                          t1, t2, t3, pix_cnt;
    int64_t                         n, l1test_width, nlines;
    double                             bytes_per_pix = 0;
    pixman_bool_t                   bench_pixbuf = FALSE;

    pixman_composite_func_t func = pixman_image_composite_wrapper;

    if (!(src_flags & SOLID_FLAG))
    {
        bytes_per_pix += (src_fmt >> 24) / 8.0;
        src_img = pixman_image_create_bits (src_fmt,
                                            WIDTH, HEIGHT,
                                            src,
                                            WIDTH * 4);
        xsrc_img = pixman_image_create_bits (src_fmt,
                                             XWIDTH, XHEIGHT,
                                             src,
                                             XWIDTH * 4);
    }

static pixman_image_t *
create_image (pixman_image_t **clone)
{
    pixman_format_code_t format = RANDOM_ELT (formats);
    pixman_image_t *image;
    int width = prng_rand_n (MAX_WIDTH);
    int height = prng_rand_n (MAX_HEIGHT);
    int stride = ((width * (PIXMAN_FORMAT_BPP (format) / 8)) + 3) & ~3;
    uint32_t *bytes = malloc (stride * height);

    prng_randmemset (bytes, stride * height, RANDMEMSET_MORE_00_AND_FF);

    image = pixman_image_create_bits (
        format, width, height, bytes, stride);

    pixman_image_set_destroy_function (image, free_bits, NULL);

    assert (image);

    if (clone)
    {
        uint32_t *bytes_dup = malloc (stride * height);

        memcpy (bytes_dup, bytes, stride * height);

        *clone = pixman_image_create_bits (
            format, width, height, bytes_dup, stride);

        pixman_image_set_destroy_function (*clone, free_bits, NULL);
    }
    
    return image;
}

int
main (int argc, char **argv)
{
    uint32_t dst[SIZE];
    pixman_image_t *src_img;
    pixman_image_t *dst_img;
    int i, j, x, y;
    int ret = 0;

    for (i = 0; i < n_test_cases; ++i)
    {
	for (j = 0; j < 2; ++j)
	{
	    src_img = pixman_image_create_bits (testcases[i].format,
						testcases[i].width,
						testcases[i].height,
						testcases[i].src,
						testcases[i].stride);
	    pixman_image_set_indexed(src_img, testcases[i].indexed);

	    dst_img = pixman_image_create_bits (PIXMAN_a8r8g8b8,
						testcases[i].width,
						testcases[i].height,
						dst,
						testcases[i].width*4);

	    if (j)
	    {
		pixman_image_set_accessors (src_img, reader, writer);
		pixman_image_set_accessors (dst_img, reader, writer);
	    }

	    pixman_image_composite (PIXMAN_OP_SRC, src_img, NULL, dst_img,
				    0, 0, 0, 0, 0, 0, testcases[i].width, testcases[i].height);

	    pixman_image_unref (src_img);
	    pixman_image_unref (dst_img);

	    for (y = 0; y < testcases[i].height; ++y)
	    {
		for (x = 0; x < testcases[i].width; ++x)
		{
		    int offset = y * testcases[i].width + x;

		    if (dst[offset] != testcases[i].dst[offset])
		    {
			printf ("test %i%c: pixel mismatch at (x=%d,y=%d): %08x expected, %08x obtained\n",
			        i + 1, 'a' + j,
			        x, y,
			        testcases[i].dst[offset], dst[offset]);
			ret = 1;
		    }
		}
	    }
	}
    }

    return ret;
}

int
main ()
{
    int o, s, m, d;

    enable_fp_exceptions();

    for (o = 0; o < ARRAY_LENGTH (pdf_ops); ++o)
    {
	pixman_op_t op = pdf_ops[o];

	for (s = 0; s < ARRAY_LENGTH (pixels); ++s)
	{
	    pixman_image_t *src;

	    src = pixman_image_create_bits (
		PIXMAN_a8r8g8b8, 1, 1, (uint32_t *)&(pixels[s]), 4);

	    for (m = -1; m < ARRAY_LENGTH (pixels); ++m)
	    {
		pixman_image_t *msk = NULL;
		if (m >= 0)
		{
		    msk = pixman_image_create_bits (
			PIXMAN_a8r8g8b8, 1, 1, (uint32_t *)&(pixels[m]), 4);
		}

		for (d = 0; d < ARRAY_LENGTH (pixels); ++d)
		{
		    pixman_image_t *dst;
		    uint32_t dp = pixels[d];

		    dst = pixman_image_create_bits (
			PIXMAN_a8r8g8b8, 1, 1, &dp, 4);

		    pixman_image_composite (op, src, msk, dst,
					    0, 0, 0, 0, 0, 0, 1, 1);

		    pixman_image_unref (dst);
		}
		if (msk)
		    pixman_image_unref (msk);
	    }

	    pixman_image_unref (src);
	}
    }

    return 0;
}

static void
Transform(DataSourceSurface* aDest,
          DataSourceSurface* aSource,
          const gfx3DMatrix& aTransform,
          const Point& aDestOffset)
{
  IntSize destSize = aDest->GetSize();
  pixman_image_t* dest = pixman_image_create_bits(PIXMAN_a8r8g8b8,
                                                  destSize.width,
                                                  destSize.height,
                                                  (uint32_t*)aDest->GetData(),
                                                  aDest->Stride());

  IntSize srcSize = aSource->GetSize();
  pixman_image_t* src = pixman_image_create_bits(PIXMAN_a8r8g8b8,
                                                 srcSize.width,
                                                 srcSize.height,
                                                 (uint32_t*)aSource->GetData(),
                                                 aSource->Stride());

  MOZ_ASSERT(src !=0 && dest != 0, "Failed to create pixman images?");

  pixman_transform pixTransform = Matrix3DToPixman(aTransform);
  pixman_transform pixTransformInverted;

  // If the transform is singular then nothing would be drawn anyway, return here
  if (!pixman_transform_invert(&pixTransformInverted, &pixTransform)) {
    pixman_image_unref(dest);
    pixman_image_unref(src);
    return;
  }
  pixman_image_set_transform(src, &pixTransformInverted);

  pixman_image_composite32(PIXMAN_OP_SRC,
                           src,
                           nullptr,
                           dest,
                           aDestOffset.x,
                           aDestOffset.y,
                           0,
                           0,
                           0,
                           0,
                           destSize.width,
                           destSize.height);

  pixman_image_unref(dest);
  pixman_image_unref(src);
}

pixman_image_t *qemu_pixman_linebuf_create(pixman_format_code_t format,
        int width)
{
    pixman_image_t *image = pixman_image_create_bits(format, width, 1, NULL, 0);
    assert(image != NULL);
    return image;
}

static XImage *create_temp_image(int screen, int width, int height,
                                 pixman_image_t **pixman_image_out,
                                 XShmSegmentInfo **shminfo_out)
{
    XImage *image;
    XShmSegmentInfo *shminfo;
    RedDrawable::Format format;
    pixman_image_t *pixman_image;
    XVisualInfo *vinfo;

    image = NULL;
    shminfo = NULL;

    vinfo = XPlatform::get_vinfo()[screen];
    format = XPlatform::get_screen_format(screen);

    image = XPlatform::create_x_image(format, width, height, vinfo->depth,
					  vinfo->visual, &shminfo);

    pixman_image = pixman_image_create_bits(RedDrawable::format_to_pixman(format),
                                            width, height,
                                            (uint32_t *)image->data, image->bytes_per_line);
    if (pixman_image == NULL) {
        THROW("surf create failed");
    }
    *pixman_image_out = pixman_image;
    *shminfo_out = shminfo;
    return image;
}

static int
pixman_renderer_surface_copy_content(struct weston_surface *surface,
				     void *target, size_t size,
				     int src_x, int src_y,
				     int width, int height)
{
	const pixman_format_code_t format = PIXMAN_a8b8g8r8;
	const size_t bytespp = 4; /* PIXMAN_a8b8g8r8 */
	struct pixman_surface_state *ps = get_surface_state(surface);
	pixman_image_t *out_buf;

	if (!ps->image)
		return -1;

	out_buf = pixman_image_create_bits(format, width, height,
					   target, width * bytespp);

	pixman_image_set_transform(ps->image, NULL);
	pixman_image_composite32(PIXMAN_OP_SRC,
				 ps->image,    /* src */
				 NULL,         /* mask */
				 out_buf,      /* dest */
				 src_x, src_y, /* src_x, src_y */
				 0, 0,         /* mask_x, mask_y */
				 0, 0,         /* dest_x, dest_y */
				 width, height);

	pixman_image_unref(out_buf);

	return 0;
}

static int
headless_compositor_create_output(struct headless_compositor *c,
				  struct headless_parameters *param)
{
	struct headless_output *output;
	struct wl_event_loop *loop;

	output = zalloc(sizeof *output);
	if (output == NULL)
		return -1;

	output->mode.flags =
		WL_OUTPUT_MODE_CURRENT | WL_OUTPUT_MODE_PREFERRED;
	output->mode.width = param->width;
	output->mode.height = param->height;
	output->mode.refresh = 60000;
	wl_list_init(&output->base.mode_list);
	wl_list_insert(&output->base.mode_list, &output->mode.link);

	output->base.current_mode = &output->mode;
	weston_output_init(&output->base, &c->base, 0, 0, param->width,
			   param->height, param->transform, 1);

	output->base.make = "weston";
	output->base.model = "headless";

	loop = wl_display_get_event_loop(c->base.wl_display);
	output->finish_frame_timer =
		wl_event_loop_add_timer(loop, finish_frame_handler, output);

	output->base.start_repaint_loop = headless_output_start_repaint_loop;
	output->base.repaint = headless_output_repaint;
	output->base.destroy = headless_output_destroy;
	output->base.assign_planes = NULL;
	output->base.set_backlight = NULL;
	output->base.set_dpms = NULL;
	output->base.switch_mode = NULL;

	if (c->use_pixman) {
		output->image_buf = malloc(param->width * param->height * 4);
		if (!output->image_buf)
			return -1;

		output->image = pixman_image_create_bits(PIXMAN_x8r8g8b8,
							 param->width,
							 param->height,
							 output->image_buf,
							 param->width * 4);

		if (pixman_renderer_output_create(&output->base) < 0)
			return -1;

		pixman_renderer_output_set_buffer(&output->base,
						  output->image);
	}

	wl_list_insert(c->base.output_list.prev, &output->base.link);

	return 0;
}

int xrdp_server_shared_framebuffer(xrdpModule* mod, XRDP_MSG_SHARED_FRAMEBUFFER* msg)
{
	mod->framebuffer.fbWidth = msg->width;
	mod->framebuffer.fbHeight = msg->height;
	mod->framebuffer.fbScanline = msg->scanline;
	mod->framebuffer.fbSegmentId = msg->segmentId;
	mod->framebuffer.fbBitsPerPixel = msg->bitsPerPixel;
	mod->framebuffer.fbBytesPerPixel = msg->bytesPerPixel;

	printf("received shared framebuffer message: mod->framebuffer.fbAttached: %d msg->attach: %d\n",
			mod->framebuffer.fbAttached, msg->attach);

	if (!mod->framebuffer.fbAttached && msg->attach)
	{
		mod->framebuffer.fbSharedMemory = (BYTE*) shmat(mod->framebuffer.fbSegmentId, 0, 0);
		mod->framebuffer.fbAttached = TRUE;

		printf("attached segment %d to %p\n",
				mod->framebuffer.fbSegmentId, mod->framebuffer.fbSharedMemory);

		mod->framebuffer.image = (void*) pixman_image_create_bits(PIXMAN_x8r8g8b8,
				mod->framebuffer.fbWidth, mod->framebuffer.fbHeight,
				(uint32_t*) mod->framebuffer.fbSharedMemory, mod->framebuffer.fbScanline);
	}

	if (mod->framebuffer.fbAttached && !msg->attach)
	{
		shmdt(mod->framebuffer.fbSharedMemory);
		mod->framebuffer.fbAttached = FALSE;
		mod->framebuffer.fbSharedMemory = 0;
	}

	return 0;
}

static inline pixman_image_t *__surface_create_stride(pixman_format_code_t format, int width, int height,
                                                      int stride)
{
    uint8_t *data;
    uint8_t *stride_data;
    pixman_image_t *surface;
    PixmanData *pixman_data;

    data = (uint8_t *)spice_malloc_n(abs(stride), height);
    if (stride < 0) {
        stride_data = data + (-stride) * (height - 1);
    } else {
        stride_data = data;
    }

    surface = pixman_image_create_bits(format, width, height, (uint32_t *)stride_data, stride);

    if (surface == NULL) {
        free(data);
        spice_error("create surface failed, out of memory");
    }

    pixman_data = pixman_image_add_data(surface);
    pixman_data->data = data;
    pixman_data->format = format;

    return surface;
}

cairo_surface_t *
_cairo_image_surface_create_with_pixman_format (unsigned char		*data,
						pixman_format_code_t	 pixman_format,
						int			 width,
						int			 height,
						int			 stride)
{
    cairo_surface_t *surface;
    pixman_image_t *pixman_image;

    if (! _cairo_image_surface_is_size_valid (width, height))
    {
	return _cairo_surface_create_in_error (_cairo_error (CAIRO_STATUS_INVALID_SIZE));
    }

    pixman_image = pixman_image_create_bits (pixman_format, width, height,
					     (uint32_t *) data, stride);

    if (unlikely (pixman_image == NULL))
	return _cairo_surface_create_in_error (_cairo_error (CAIRO_STATUS_NO_MEMORY));

    surface = _cairo_image_surface_create_for_pixman_image (pixman_image,
							    pixman_format);
    if (unlikely (surface->status)) {
	pixman_image_unref (pixman_image);
	return surface;
    }

    /* we can not make any assumptions about the initial state of user data */
    surface->is_clear = data == NULL;
    return surface;
}

WL_EXPORT int
pixman_renderer_output_create(struct weston_output *output)
{
	struct pixman_output_state *po = calloc(1, sizeof *po);
	int w, h;

	if (!po)
		return -1;

	/* set shadow image transformation */
	w = output->current_mode->width;
	h = output->current_mode->height;

	po->shadow_buffer = malloc(w * h * 4);

	if (!po->shadow_buffer) {
		free(po);
		return -1;
	}

	po->shadow_image =
		pixman_image_create_bits(PIXMAN_x8r8g8b8, w, h,
					 po->shadow_buffer, w * 4);

	if (!po->shadow_image) {
		free(po->shadow_buffer);
		free(po);
		return -1;
	}

	output->renderer_state = po;

	return 0;
}

static pixman_image_t *
create_bits_picture(PicturePtr pict, Bool has_clip, int *xoff, int *yoff)
{
    PixmapPtr pixmap;
    FbBits *bits;
    FbStride stride;
    int bpp;
    pixman_image_t *image;

    fbGetDrawablePixmap(pict->pDrawable, pixmap, *xoff, *yoff);
    fbGetPixmapBitsData(pixmap, bits, stride, bpp);

    image = pixman_image_create_bits((pixman_format_code_t) pict->format,
                                     pixmap->drawable.width,
                                     pixmap->drawable.height, (uint32_t *) bits,
                                     stride * sizeof(FbStride));

    if (!image)
        return NULL;

#ifdef FB_ACCESS_WRAPPER
#if FB_SHIFT==5

    pixman_image_set_accessors(image,
                               (pixman_read_memory_func_t) wfbReadMemory,
                               (pixman_write_memory_func_t) wfbWriteMemory);

#else

#error The pixman library only works when FbBits is 32 bits wide

#endif
#endif

    /* pCompositeClip is undefined for source pictures, so
     * only set the clip region for pictures with drawables
     */
    if (has_clip) {
        if (pict->clientClipType != CT_NONE)
            pixman_image_set_has_client_clip(image, TRUE);

        if (*xoff || *yoff)
            pixman_region_translate(pict->pCompositeClip, *xoff, *yoff);

        pixman_image_set_clip_region(image, pict->pCompositeClip);

        if (*xoff || *yoff)
            pixman_region_translate(pict->pCompositeClip, -*xoff, -*yoff);
    }

    /* Indexed table */
    if (pict->pFormat->index.devPrivate)
        pixman_image_set_indexed(image, pict->pFormat->index.devPrivate);

    /* Add in drawable origin to position within the image */
    *xoff += pict->pDrawable->x;
    *yoff += pict->pDrawable->y;

    return image;
}

static void process_image_data(struct fp_img_dev *dev, char **output, int *output_height)
{
    //pixman stuff taken from libfprint/pixman.c, adapted for my purposes.
    pixman_image_t *orig, *resized;
    pixman_transform_t transform;
    struct vfs0050_dev *vfs_dev = dev->priv;
    struct vfs0050_line *line, *calibration_line;
    char *buf = malloc(vfs_dev->scanbuf_idx);
    int lines = vfs_dev->scanbuf_idx / VFS0050_FRAME_SIZE;
    int i, x, sum, last_sum, diff;
    int new_height;
    //just grab one around middle, there should be 100
    calibration_line = (struct vfs0050_line *) ((char *) vfs_dev->calbuf + (50 * VFS0050_FRAME_SIZE));

    new_height = 0;
    for (i = 0; i < lines; i++) {
        line = (struct vfs0050_line *) ((char *) vfs_dev->scanbuf + (i * VFS0050_FRAME_SIZE));
        if (!is_noise(line))
            memcpy(buf + (new_height++ * VFS0050_IMG_WIDTH), line->row, VFS0050_IMG_WIDTH);
        else
            fp_dbg("removed noise at line: %d\n", i);
    }

    orig = pixman_image_create_bits(PIXMAN_a8, VFS0050_IMG_WIDTH, new_height, (uint32_t *) buf, VFS0050_IMG_WIDTH);
    new_height *= VFS0050_SCALE_FACTOR; //scale for resized image
    resized = pixman_image_create_bits(PIXMAN_a8, VFS0050_IMG_WIDTH, new_height, NULL, VFS0050_IMG_WIDTH);
    pixman_transform_init_identity(&transform);
    pixman_transform_scale(NULL, &transform, pixman_int_to_fixed(1), pixman_double_to_fixed(0.2));
    pixman_image_set_transform(orig, &transform);
    pixman_image_set_filter(orig, PIXMAN_FILTER_BEST, NULL, 0);
    pixman_image_composite32(PIXMAN_OP_SRC,
                             orig,
                             NULL,
                             resized,
                             0, 0,
                             0, 0,
                             0, 0,
                             VFS0050_IMG_WIDTH, new_height
                            );
    memcpy(buf, pixman_image_get_data(resized), VFS0050_IMG_WIDTH * new_height);

    pixman_image_unref(orig);
    pixman_image_unref(resized);

    *output_height = new_height;
    *output = buf;
}