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https://github.com/obsproject/obs-studio.git
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e20ec366b2
This fixes an issue primarily with filter rendering: when capturing windows and displays, their alpha channel is almost always 0, causing the image to be completely invisible unintentionally. The original fix for this for many sources was just to turn off the blending, which would be fine if you're not rendering any filters, but filters will render to render targets first, and that lack of alpha will end up carrying over in to the final image. This doesn't apply to any mac captures because mac actually seems to set the alpha channel to 1.
128 lines
3.4 KiB
C
128 lines
3.4 KiB
C
/*
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Copyright (C) 2014 by Leonhard Oelke <leonhard@in-verted.de>
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <stdint.h>
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#include <X11/extensions/Xfixes.h>
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#include <util/bmem.h>
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#include "xcursor.h"
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/*
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* Get pixel data for the cursor
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*
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* XFixes has the data defined as unsigned long, so we can not use memcpy.
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* Theres a lot of talk about this in other implementation and they tend to
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* be really complicated, but this naive approach seems to work fine ...
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*/
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static uint32_t *xcursor_pixels(XFixesCursorImage *xc) {
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uint_fast32_t size = xc->width * xc->height;
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uint32_t *pixels = bmalloc(size * sizeof(uint32_t));
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for (uint_fast32_t i = 0; i < size; ++i)
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pixels[i] = (uint32_t) xc->pixels[i];
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return pixels;
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}
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/*
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* Create the cursor texture, either by updating if the new cursor has the same
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* size or by creating a new texture if the size is different
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*/
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static void xcursor_create(xcursor_t *data, XFixesCursorImage *xc) {
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uint32_t *pixels = xcursor_pixels(xc);
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if (!pixels)
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return;
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if (data->tex
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&& data->last_height == xc->width
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&& data->last_width == xc->height) {
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gs_texture_set_image(data->tex, (const uint8_t *) pixels,
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xc->width * sizeof(uint32_t), False);
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} else {
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if (data->tex)
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gs_texture_destroy(data->tex);
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data->tex = gs_texture_create(xc->width, xc->height,
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GS_BGRA, 1, (const uint8_t **) &pixels, GS_DYNAMIC);
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}
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bfree(pixels);
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data->last_serial = xc->cursor_serial;
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data->last_width = xc->width;
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data->last_height = xc->height;
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}
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xcursor_t *xcursor_init(Display *dpy) {
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xcursor_t *data = bzalloc(sizeof(xcursor_t));
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data->dpy = dpy;
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xcursor_tick(data);
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return data;
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}
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void xcursor_destroy(xcursor_t *data) {
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if (data->tex)
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gs_texture_destroy(data->tex);
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bfree(data);
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}
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void xcursor_tick(xcursor_t *data) {
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XFixesCursorImage *xc = XFixesGetCursorImage(data->dpy);
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if (!xc)
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return;
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if (!data->tex || data->last_serial != xc->cursor_serial)
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xcursor_create(data, xc);
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data->x = (int_fast32_t)xc->x - (int_fast32_t)data->x_org;
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data->y = (int_fast32_t)xc->y - (int_fast32_t)data->y_org;
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data->render_x = xc->x - xc->xhot - data->x_org;
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data->render_y = xc->y - xc->yhot - data->y_org;
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XFree(xc);
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}
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void xcursor_render(xcursor_t *data) {
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if (!data->tex)
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return;
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gs_effect_t *effect = gs_get_effect();
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gs_eparam_t *image = gs_effect_get_param_by_name(effect, "image");
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gs_effect_set_texture(image, data->tex);
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gs_blend_state_push();
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gs_blend_function(GS_BLEND_SRCALPHA, GS_BLEND_INVSRCALPHA);
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gs_enable_color(true, true, true, false);
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gs_matrix_push();
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gs_matrix_translate3f(data->render_x, data->render_y, 0.0f);
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gs_draw_sprite(data->tex, 0, 0, 0);
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gs_matrix_pop();
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gs_enable_color(true, true, true, true);
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gs_blend_state_pop();
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}
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void xcursor_offset(xcursor_t* data, int_fast32_t x_org, int_fast32_t y_org)
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{
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data->x_org = x_org;
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data->y_org = y_org;
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}
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