void vgImageSubData(VGImage image,
const void * data,
VGint dataStride,
VGImageFormat dataFormat,
VGint x, VGint y,
VGint width, VGint height)
{
struct vg_context *ctx = vg_current_context();
struct vg_image *img;
if (image == VG_INVALID_HANDLE) {
vg_set_error(ctx, VG_BAD_HANDLE_ERROR);
return;
}
if (!supported_image_format(dataFormat)) {
vg_set_error(ctx, VG_UNSUPPORTED_IMAGE_FORMAT_ERROR);
return;
}
if (width <= 0 || height <= 0 || !data || !is_aligned(data)) {
vg_set_error(ctx, VG_ILLEGAL_ARGUMENT_ERROR);
return;
}
img = (struct vg_image*)(image);
image_sub_data(img, data, dataStride, dataFormat,
x, y, width, height);
}
static void image_cleari(struct vg_image *img, VGint clear_colori,
VGint x, VGint y, VGint width, VGint height)
{
VGint *clearbuf;
VGint i;
VGfloat dwidth, dheight;
clearbuf = malloc(sizeof(VGint)*width*height);
for (i = 0; i < width*height; ++i)
clearbuf[i] = clear_colori;
dwidth = MIN2(width, img->width);
dheight = MIN2(height, img->height);
image_sub_data(img, clearbuf, width * sizeof(VGint),
VG_sRGBA_8888,
x, y, dwidth, dheight);
free(clearbuf);
}
void vgWritePixels(const void * data, VGint dataStride,
VGImageFormat dataFormat,
VGint dx, VGint dy,
VGint width, VGint height)
{
struct vg_context *ctx = vg_current_context();
struct pipe_context *pipe = ctx->pipe;
if (!supported_image_format(dataFormat)) {
vg_set_error(ctx, VG_UNSUPPORTED_IMAGE_FORMAT_ERROR);
return;
}
if (!data || !is_aligned(data)) {
vg_set_error(ctx, VG_ILLEGAL_ARGUMENT_ERROR);
return;
}
if (width <= 0 || height <= 0) {
vg_set_error(ctx, VG_ILLEGAL_ARGUMENT_ERROR);
return;
}
vg_validate_state(ctx);
{
struct vg_image *img = image_create(dataFormat, width, height);
image_sub_data(img, data, dataStride, dataFormat, 0, 0,
width, height);
#if 0
struct matrix *matrix = &ctx->state.vg.image_user_to_surface_matrix;
matrix_translate(matrix, dx, dy);
image_draw(img);
matrix_translate(matrix, -dx, -dy);
#else
/* this looks like a better approach */
image_set_pixels(dx, dy, img, 0, 0, width, height);
#endif
image_destroy(img);
}
/* make sure rendering has completed */
pipe->flush(pipe, PIPE_FLUSH_RENDER_CACHE, NULL);
}
