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https://github.com/hyprwm/wlroots-hyprland.git
synced 2024-11-05 05:05:57 +01:00
render/gles2: Implement texture_read_pixels
Also get rid of gles2_texture.owns_texture. We only use the tex/fbo
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parent
01bd098166
commit
e7055b4840
2 changed files with 110 additions and 5 deletions
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@ -121,8 +121,12 @@ struct wlr_gles2_texture {
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struct wl_list link; // wlr_gles2_renderer.textures
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GLenum target;
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bool owns_tex;
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// If this texture is imported from a buffer, the texture is does not own
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// these states. These cannot be destroyed along with the texture in this
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// case.
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GLuint tex;
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GLuint fbo;
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bool has_alpha;
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@ -110,9 +110,7 @@ void gles2_texture_destroy(struct wlr_gles2_texture *texture) {
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wl_list_remove(&texture->link);
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if (texture->buffer != NULL) {
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wlr_buffer_unlock(texture->buffer->buffer);
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}
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if (texture->owns_tex) {
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} else {
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struct wlr_egl_context prev_ctx;
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wlr_egl_save_context(&prev_ctx);
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wlr_egl_make_current(texture->renderer->egl);
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@ -120,6 +118,7 @@ void gles2_texture_destroy(struct wlr_gles2_texture *texture) {
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push_gles2_debug(texture->renderer);
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glDeleteTextures(1, &texture->tex);
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glDeleteFramebuffers(1, &texture->fbo);
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pop_gles2_debug(texture->renderer);
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@ -133,8 +132,111 @@ static void handle_gles2_texture_destroy(struct wlr_texture *wlr_texture) {
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gles2_texture_destroy(gles2_get_texture(wlr_texture));
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}
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static bool gles2_texture_bind(struct wlr_gles2_texture *texture) {
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if (texture->fbo) {
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glBindFramebuffer(GL_FRAMEBUFFER, texture->fbo);
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} else if (texture->buffer) {
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if (texture->buffer->external_only) {
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return false;
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}
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GLuint fbo = gles2_buffer_get_fbo(texture->buffer);
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if (!fbo) {
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return false;
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}
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glBindFramebuffer(GL_FRAMEBUFFER, fbo);
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} else {
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glGenFramebuffers(1, &texture->fbo);
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glBindFramebuffer(GL_FRAMEBUFFER, texture->fbo);
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glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0,
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texture->target, texture->tex, 0);
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GLenum fb_status = glCheckFramebufferStatus(GL_FRAMEBUFFER);
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if (fb_status != GL_FRAMEBUFFER_COMPLETE) {
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wlr_log(WLR_ERROR, "Failed to create FBO");
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glDeleteFramebuffers(1, &texture->fbo);
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texture->fbo = 0;
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glBindFramebuffer(GL_FRAMEBUFFER, 0);
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return false;
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}
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}
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return true;
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}
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static bool gles2_texture_read_pixels(struct wlr_texture *wlr_texture,
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const struct wlr_texture_read_pixels_options *options) {
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struct wlr_gles2_texture *texture = gles2_get_texture(wlr_texture);
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struct wlr_box src;
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wlr_texture_read_pixels_options_get_src_box(options, wlr_texture, &src);
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const struct wlr_gles2_pixel_format *fmt =
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get_gles2_format_from_drm(options->format);
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if (fmt == NULL || !is_gles2_pixel_format_supported(texture->renderer, fmt)) {
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wlr_log(WLR_ERROR, "Cannot read pixels: unsupported pixel format 0x%"PRIX32, options->format);
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return false;
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}
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if (fmt->gl_format == GL_BGRA_EXT && !texture->renderer->exts.EXT_read_format_bgra) {
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wlr_log(WLR_ERROR,
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"Cannot read pixels: missing GL_EXT_read_format_bgra extension");
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return false;
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}
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const struct wlr_pixel_format_info *drm_fmt =
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drm_get_pixel_format_info(fmt->drm_format);
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assert(drm_fmt);
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if (pixel_format_info_pixels_per_block(drm_fmt) != 1) {
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wlr_log(WLR_ERROR, "Cannot read pixels: block formats are not supported");
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return false;
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}
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push_gles2_debug(texture->renderer);
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if (!wlr_egl_make_current(texture->renderer->egl)) {
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return false;
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}
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if (!gles2_texture_bind(texture)) {
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return false;
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}
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// Make sure any pending drawing is finished before we try to read it
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glFinish();
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glGetError(); // Clear the error flag
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unsigned char *p = wlr_texture_read_pixel_options_get_data(options);
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glPixelStorei(GL_PACK_ALIGNMENT, 1);
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uint32_t pack_stride = pixel_format_info_min_stride(drm_fmt, src.width);
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if (pack_stride == options->stride && options->dst_x == 0) {
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// Under these particular conditions, we can read the pixels with only
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// one glReadPixels call
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glReadPixels(src.x, src.y, src.width, src.height, fmt->gl_format, fmt->gl_type, p);
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} else {
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// Unfortunately GLES2 doesn't support GL_PACK_ROW_LENGTH, so we have to read
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// the lines out row by row
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for (int32_t i = 0; i < src.height; ++i) {
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uint32_t y = src.y + i;
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glReadPixels(src.x, y, src.width, 1, fmt->gl_format,
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fmt->gl_type, p + i * options->stride);
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}
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}
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glBindFramebuffer(GL_FRAMEBUFFER, 0);
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pop_gles2_debug(texture->renderer);
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return glGetError() == GL_NO_ERROR;
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}
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static const struct wlr_texture_impl texture_impl = {
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.update_from_buffer = gles2_texture_update_from_buffer,
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.read_pixels = gles2_texture_read_pixels,
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.destroy = handle_gles2_texture_destroy,
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};
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@ -185,7 +287,6 @@ static struct wlr_texture *gles2_texture_from_pixels(
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texture->target = GL_TEXTURE_2D;
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texture->has_alpha = drm_fmt->has_alpha;
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texture->drm_format = fmt->drm_format;
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texture->owns_tex = true;
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GLint internal_format = fmt->gl_internalformat;
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if (!internal_format) {
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