diff options
Diffstat (limited to 'render/gles2/renderer.c')
| -rw-r--r-- | render/gles2/renderer.c | 36 |
1 files changed, 25 insertions, 11 deletions
diff --git a/render/gles2/renderer.c b/render/gles2/renderer.c index 30247af0..8c5b81ad 100644 --- a/render/gles2/renderer.c +++ b/render/gles2/renderer.c @@ -211,20 +211,33 @@ static bool wlr_gles2_buffer_is_drm(struct wlr_renderer *_renderer, EGL_TEXTURE_FORMAT, &format); } -static void rgba_to_argb(uint32_t *data, size_t height, size_t stride) { - size_t n = height*stride/4; - for (size_t i = 0; i < n; ++i) { - uint32_t v = data[i]; - uint32_t rgb = (v & 0xffffff00) >> 8; - uint32_t a = v & 0x000000ff; - data[i] = rgb | (a << 24); +static bool wlr_gles2_read_pixels(struct wlr_renderer *renderer, + enum wl_shm_format wl_fmt, uint32_t stride, uint32_t width, + uint32_t height, uint32_t src_x, uint32_t src_y, uint32_t dst_x, + uint32_t dst_y, void *data) { + const struct pixel_format *fmt = gl_format_for_wl_format(wl_fmt); + if (fmt == NULL) { + wlr_log(L_ERROR, "Cannot read pixels: unsupported pixel format"); + return false; + } + + // Make sure any pending drawing is finished before we try to read it + glFinish(); + + // Unfortunately GLES2 doesn't support GL_PACK_*, so we have to read + // the lines out row by row + unsigned char *p = data + dst_y * stride; + for (size_t i = src_y; i < src_y + height; ++i) { + glReadPixels(src_x, src_y + height - i - 1, width, 1, fmt->gl_format, + fmt->gl_type, p + i * stride + dst_x * fmt->bpp / 8); } + + return true; } -static void wlr_gles2_read_pixels(struct wlr_renderer *renderer, int x, int y, - int width, int height, void *out_data) { - glReadPixels(x, y, width, height, GL_RGBA, GL_UNSIGNED_BYTE, out_data); - rgba_to_argb(out_data, height, width*4); +static bool wlr_gles2_format_supported(struct wlr_renderer *r, + enum wl_shm_format wl_fmt) { + return gl_format_for_wl_format(wl_fmt); } static struct wlr_renderer_impl wlr_renderer_impl = { @@ -237,6 +250,7 @@ static struct wlr_renderer_impl wlr_renderer_impl = { .formats = wlr_gles2_formats, .buffer_is_drm = wlr_gles2_buffer_is_drm, .read_pixels = wlr_gles2_read_pixels, + .format_supported = wlr_gles2_format_supported, }; struct wlr_renderer *wlr_gles2_renderer_create(struct wlr_backend *backend) { |