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205 lines
7.7 KiB
205 lines
7.7 KiB
/*
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* Copyright © 2012 John Kåre Alsaker
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sublicense, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice (including the
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* next paragraph) shall be included in all copies or substantial
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* portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* 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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#include "config.h"
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#include <stdint.h>
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#include <libweston/libweston.h>
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#include "backend.h"
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#include "libweston-internal.h"
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#ifdef ENABLE_EGL
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#include <EGL/egl.h>
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#include <EGL/eglext.h>
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#else
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typedef int EGLint;
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typedef int EGLenum;
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typedef void *EGLDisplay;
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typedef void *EGLSurface;
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typedef void *EGLConfig;
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typedef intptr_t EGLNativeDisplayType;
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typedef intptr_t EGLNativeWindowType;
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#define EGL_DEFAULT_DISPLAY ((EGLNativeDisplayType)0)
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#define EGL_PBUFFER_BIT 0x0001
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#define EGL_WINDOW_BIT 0x0004
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#endif /* ENABLE_EGL */
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enum gl_renderer_border_side {
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GL_RENDERER_BORDER_TOP = 0,
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GL_RENDERER_BORDER_LEFT = 1,
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GL_RENDERER_BORDER_RIGHT = 2,
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GL_RENDERER_BORDER_BOTTOM = 3,
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};
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struct gl_renderer_interface {
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/**
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* Initialize GL-renderer with the given EGL platform and native display
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*
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* \param ec The weston_compositor where to initialize.
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* \param platform The EGL platform identifier.
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* \param native_display The native display corresponding to the given
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* EGL platform.
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* \param egl_surface_type EGL_SURFACE_TYPE bits for the base EGLConfig.
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* \param drm_formats Array of DRM pixel formats that are acceptable
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* for the base EGLConfig.
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* \param drm_formats_count The drm_formats array length.
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* \return 0 on success, -1 on failure.
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*
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* This function creates an EGLDisplay and initializes it. It also
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* creates the GL ES context and sets it up. It attempts GL ES 3.0
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* and falls back to GL ES 2.0 if 3.0 is not supported.
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*
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* If \c platform is zero or EGL_EXT_platform_base is not supported,
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* choosing the platform is left for the EGL implementation. Otherwise
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* the given platform is used explicitly if the EGL implementation
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* advertises it. Without the advertisement this function fails.
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*
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* If neither EGL_KHR_no_config_context or EGL_MESA_configless_context
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* are supported, the arguments egl_surface_type, drm_formats, and
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* drm_formats_count are used to find a so called base EGLConfig. The
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* GL context is created with the base EGLConfig, and outputs will be
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* required to use the same config as well. If one or both of the
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* extensions are supported, these arguments are unused, and each
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* output can use a different EGLConfig (pixel format).
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*
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* The first format in drm_formats that matches any EGLConfig
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* determines which EGLConfig is chosen. On EGL GBM platform, the
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* pixel format must match exactly. On other platforms, it is enough
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* that each R, G, B, A channel has the same number of bits as in the
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* DRM format.
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*/
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int (*display_create)(struct weston_compositor *ec,
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EGLenum platform,
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void *native_display,
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EGLint egl_surface_type,
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const uint32_t *drm_formats,
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unsigned drm_formats_count);
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/**
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* Attach GL-renderer to the output with a native window
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*
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* \param output The output to create a rendering surface for.
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* \param window_for_legacy Native window handle for
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* eglCreateWindowSurface().
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* \param window_for_platform Native window handle for
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* eglCreatePlatformWindowSurface().
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* \param drm_formats Array of DRM pixel formats that are acceptable.
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* \param drm_formats_count The drm_formats array length.
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* \return 0 on success, -1 on failure.
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*
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* This function creates the renderer data structures needed to repaint
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* the output. The repaint results will be directed to the given native
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* window.
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*
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* If EGL_EXT_platform_base is supported then \c window_for_platform is
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* used, otherwise \c window_for_legacy is used. This is because the
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* handle on X11 platform is different between the two.
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*
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* The first format in drm_formats that matches any EGLConfig
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* determines which EGLConfig is chosen. See \c display_create about
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* how the matching works and the possible limitations.
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*
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* This function should be used only if \c display_create was called
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* with \c EGL_WINDOW_BIT in \c egl_surface_type.
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*/
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int (*output_window_create)(struct weston_output *output,
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EGLNativeWindowType window_for_legacy,
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void *window_for_platform,
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const uint32_t *drm_formats,
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unsigned drm_formats_count);
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/**
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* Attach GL-renderer to the output with internal pixel storage
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*
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* \param output The output to create a rendering surface for.
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* \param width Width of the rendering surface in pixels.
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* \param height Height of the rendering surface in pixels.
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* \param drm_formats Array of DRM pixel formats that are acceptable.
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* \param drm_formats_count The drm_formats array length.
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* \return 0 on success, -1 on failure.
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*
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* This function creates the renderer data structures needed to repaint
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* the output. The repaint results will be kept internal and can only
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* be accessed through e.g. screen capture.
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*
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* The first format in drm_formats that matches any EGLConfig
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* determines which EGLConfig is chosen. See \c display_create about
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* how the matching works and the possible limitations.
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*
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* This function should be used only if \c display_create was called
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* with \c EGL_PBUFFER_BIT in \c egl_surface_type.
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*/
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int (*output_pbuffer_create)(struct weston_output *output,
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int width,
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int height,
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const uint32_t *drm_formats,
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unsigned drm_formats_count);
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void (*output_destroy)(struct weston_output *output);
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/* Sets the output border.
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*
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* The side specifies the side for which we are setting the border.
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* The width and height are the width and height of the border.
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* The tex_width patemeter specifies the width of the actual
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* texture; this may be larger than width if the data is not
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* tightly packed.
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*
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* The top and bottom textures will extend over the sides to the
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* full width of the bordered window. The right and left edges,
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* however, will extend only to the top and bottom of the
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* compositor surface. This is demonstrated by the picture below:
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*
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* +-----------------------+
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* | TOP |
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* +-+-------------------+-+
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* | | | |
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* |L| |R|
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* |E| |I|
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* |F| |G|
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* |T| |H|
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* | | |T|
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* | | | |
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* +-+-------------------+-+
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* | BOTTOM |
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* +-----------------------+
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*/
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void (*output_set_border)(struct weston_output *output,
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enum gl_renderer_border_side side,
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int32_t width, int32_t height,
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int32_t tex_width, unsigned char *data);
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/* Create fence sync FD to wait for GPU rendering.
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*
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* Return FD on success, -1 on failure or unsupported
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* EGL_ANDROID_native_fence_sync extension.
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*/
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int (*create_fence_fd)(struct weston_output *output);
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};
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