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d2b161bdf8
Add buffer_adopt_cairo_surface(), which allows wrapping an existing cairo image surface in a struct lab_data_buffer. This is useful when loading PNGs since most will be loaded as ARGB32 already. Fix a memory leak in the non-ARGB32 PNG case, where we do still need to paint to a new image surface -- we were leaking the original surface. Eliminate an unnecessary temporary image surface in SVG loading and just render the SVG to the image surface held by the lab_data_buffer. I also cleaned up and clarified the buffer API a bit: - Add a pointer to the held cairo_surface_t (so we can still access it if there is no cairo_t). - Remove the free_on_destroy bool (it was always true). - Rename unscaled_width/height to logical_width/height and add an explanatory comment. It was unclear what "unscaled" meant. - Rename buffer_create_wrap() to buffer_create_from_data(). This is laying groundwork for some more icon fixes I am working on (making sure icons are loaded and rendered at the correct scale).
74 lines
2.6 KiB
C
74 lines
2.6 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* Based on wlroots/include/types/wlr_buffer.c
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*
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* Copyright (c) 2017, 2018 Drew DeVault
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* Copyright (c) 2018-2021 Simon Ser, Simon Zeni
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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#ifndef LABWC_BUFFER_H
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#define LABWC_BUFFER_H
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#include <cairo.h>
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#include <wlr/types/wlr_buffer.h>
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struct lab_data_buffer {
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struct wlr_buffer base;
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cairo_surface_t *surface; /* optional */
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cairo_t *cairo; /* optional */
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void *data; /* owned by surface if surface != NULL */
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uint32_t format;
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size_t stride;
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/*
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* The logical size of the surface in layout pixels.
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* The raw pixel data may be larger or smaller.
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*/
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uint32_t logical_width;
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uint32_t logical_height;
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};
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/*
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* Create a buffer which holds (and takes ownership of) an existing
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* CAIRO_FORMAT_ARGB32 image surface.
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*
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* The logical size is set to the surface size in pixels, ignoring
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* device scale. No cairo context is created.
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*/
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struct lab_data_buffer *buffer_adopt_cairo_surface(cairo_surface_t *surface);
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/*
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* Create a buffer which holds a new CAIRO_FORMAT_ARGB32 image surface.
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* Additionally create a cairo context for drawing to the surface.
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*/
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struct lab_data_buffer *buffer_create_cairo(uint32_t logical_width,
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uint32_t logical_height, float scale);
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/*
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* Create a buffer which holds (and takes ownership of) raw pixel data
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* in pre-multiplied ARGB32 format.
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*
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* The logical size is set to the width and height of the pixel data.
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* No cairo surface or context is created.
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*/
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struct lab_data_buffer *buffer_create_from_data(void *pixel_data, uint32_t width,
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uint32_t height, uint32_t stride);
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#endif /* LABWC_BUFFER_H */
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