old data

2025-08-25 09:50:30 +08:00
parent bd0e31e922
commit 1359ff4ecc
1630 changed files with 738486 additions and 2399 deletions
@@ -0,0 +1,277 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 2017 BlackBerry Limited
+
+  This software is provided 'as-is', without any express or implied
+  warranty.  In no event will the authors be held liable for any damages
+  arising from the use of this software.
+
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely, subject to the following restrictions:
+
+  1. The origin of this software must not be misrepresented; you must not
+     claim that you wrote the original software. If you use this software
+     in a product, an acknowledgment in the product documentation would be
+     appreciated but is not required.
+  2. Altered source versions must be plainly marked as such, and must not be
+     misrepresented as being the original software.
+  3. This notice may not be removed or altered from any source distribution.
+*/
+
+#include "../../SDL_internal.h"
+#include "SDL_qnx.h"
+
+static EGLDisplay   egl_disp;
+
+/**
+ * Detertmines the pixel format to use based on the current display and EGL
+ * configuration.
+ * @param   egl_conf    EGL configuration to use
+ * @return  A SCREEN_FORMAT* constant for the pixel format to use
+ */
+static int chooseFormat(EGLConfig egl_conf)
+{
+    EGLint buffer_bit_depth;
+    EGLint alpha_bit_depth;
+
+    eglGetConfigAttrib(egl_disp, egl_conf, EGL_BUFFER_SIZE, &buffer_bit_depth);
+    eglGetConfigAttrib(egl_disp, egl_conf, EGL_ALPHA_SIZE, &alpha_bit_depth);
+
+    switch (buffer_bit_depth) {
+        case 32:
+            return SCREEN_FORMAT_RGBX8888;
+        case 24:
+            return SDL_PIXELFORMAT_RGB24;
+        case 16:
+            switch (alpha_bit_depth) {
+                case 4:
+                    return SCREEN_FORMAT_RGBX4444;
+                case 1:
+                    return SCREEN_FORMAT_RGBA5551;
+                default:
+                    return SCREEN_FORMAT_RGB565;
+            }
+        default:
+            return 0;
+    }
+}
+
+/**
+ * Enumerates the supported EGL configurations and chooses a suitable one.
+ * @param[out]  pconf   The chosen configuration
+ * @param[out]  pformat The chosen pixel format
+ * @return true if successful, -1 on error
+ */
+bool glGetConfig(EGLConfig *pconf, int *pformat)
+{
+    EGLConfig egl_conf = (EGLConfig)0;
+    EGLConfig *egl_configs;
+    EGLint egl_num_configs;
+    EGLint val;
+    EGLBoolean rc;
+    EGLint i;
+
+    // Determine the numbfer of configurations.
+    rc = eglGetConfigs(egl_disp, NULL, 0, &egl_num_configs);
+    if (rc != EGL_TRUE) {
+        return false;
+    }
+
+    if (egl_num_configs == 0) {
+        return false;
+    }
+
+    // Allocate enough memory for all configurations.
+    egl_configs = SDL_malloc(egl_num_configs * sizeof(*egl_configs));
+    if (!egl_configs) {
+        return false;
+    }
+
+    // Get the list of configurations.
+    rc = eglGetConfigs(egl_disp, egl_configs, egl_num_configs,
+                       &egl_num_configs);
+    if (rc != EGL_TRUE) {
+        SDL_free(egl_configs);
+        return false;
+    }
+
+    // Find a good configuration.
+    for (i = 0; i < egl_num_configs; i++) {
+        eglGetConfigAttrib(egl_disp, egl_configs[i], EGL_SURFACE_TYPE, &val);
+        if (!(val & EGL_WINDOW_BIT)) {
+            continue;
+        }
+
+        eglGetConfigAttrib(egl_disp, egl_configs[i], EGL_RENDERABLE_TYPE, &val);
+        if (!(val & EGL_OPENGL_ES2_BIT)) {
+            continue;
+        }
+
+        eglGetConfigAttrib(egl_disp, egl_configs[i], EGL_DEPTH_SIZE, &val);
+        if (val == 0) {
+            continue;
+        }
+
+        egl_conf = egl_configs[i];
+        break;
+    }
+
+    SDL_free(egl_configs);
+    *pconf = egl_conf;
+    *pformat = chooseFormat(egl_conf);
+
+    return true;
+}
+
+/**
+ * Initializes the EGL library.
+ * @param   SDL_VideoDevice *_this
+ * @param   name    unused
+ * @return  0 if successful, -1 on error
+ */
+bool glLoadLibrary(SDL_VideoDevice *_this, const char *name)
+{
+    EGLNativeDisplayType    disp_id = EGL_DEFAULT_DISPLAY;
+
+    egl_disp = eglGetDisplay(disp_id);
+    if (egl_disp == EGL_NO_DISPLAY) {
+        return false;
+    }
+
+    if (eglInitialize(egl_disp, NULL, NULL) == EGL_FALSE) {
+        return false;
+    }
+
+    return true;
+}
+
+/**
+ * Finds the address of an EGL extension function.
+ * @param   proc    Function name
+ * @return  Function address
+ */
+SDL_FunctionPointer glGetProcAddress(SDL_VideoDevice *_this, const char *proc)
+{
+    return eglGetProcAddress(proc);
+}
+
+/**
+ * Associates the given window with the necessary EGL structures for drawing and
+ * displaying content.
+ * @param   SDL_VideoDevice *_this
+ * @param   window  The SDL window to create the context for
+ * @return  A pointer to the created context, if successful, NULL on error
+ */
+SDL_GLContext glCreateContext(SDL_VideoDevice *_this, SDL_Window *window)
+{
+    window_impl_t   *impl = (window_impl_t *)window->internal;
+    EGLContext      context;
+    EGLSurface      surface;
+
+    struct {
+        EGLint client_version[2];
+        EGLint none;
+    } egl_ctx_attr = {
+        .client_version = { EGL_CONTEXT_CLIENT_VERSION, 2 },
+        .none = EGL_NONE
+    };
+
+    struct {
+        EGLint render_buffer[2];
+        EGLint none;
+    } egl_surf_attr = {
+        .render_buffer = { EGL_RENDER_BUFFER, EGL_BACK_BUFFER },
+        .none = EGL_NONE
+    };
+
+    context = eglCreateContext(egl_disp, impl->conf, EGL_NO_CONTEXT,
+                               (EGLint *)&egl_ctx_attr);
+    if (context == EGL_NO_CONTEXT) {
+        return NULL;
+    }
+
+    surface = eglCreateWindowSurface(egl_disp, impl->conf,
+                                     (EGLNativeWindowType)impl->window,
+                                     (EGLint *)&egl_surf_attr);
+    if (surface == EGL_NO_SURFACE) {
+        return NULL;
+    }
+
+    eglMakeCurrent(egl_disp, surface, surface, context);
+
+    impl->surface = surface;
+    return context;
+}
+
+/**
+ * Sets a new value for the number of frames to display before swapping buffers.
+ * @param   SDL_VideoDevice *_this
+ * @param   interval    New interval value
+ * @return  0 if successful, -1 on error
+ */
+bool glSetSwapInterval(SDL_VideoDevice *_this, int interval)
+{
+    if (eglSwapInterval(egl_disp, interval) != EGL_TRUE) {
+        return false;
+    }
+
+    return true;
+}
+
+/**
+ * Swaps the EGL buffers associated with the given window
+ * @param   SDL_VideoDevice *_this
+ * @param   window  Window to swap buffers for
+ * @return  0 if successful, -1 on error
+ */
+bool glSwapWindow(SDL_VideoDevice *_this, SDL_Window *window)
+{
+    // !!! FIXME: should we migrate this all over to use SDL_egl.c?
+    window_impl_t   *impl = (window_impl_t *)window->internal;
+    return eglSwapBuffers(egl_disp, impl->surface) == EGL_TRUE ? 0 : -1;
+}
+
+/**
+ * Makes the given context the current one for drawing operations.
+ * @param   SDL_VideoDevice *_this
+ * @param   window  SDL window associated with the context (maybe NULL)
+ * @param   context The context to activate
+ * @return  0 if successful, -1 on error
+ */
+bool glMakeCurrent(SDL_VideoDevice *_this, SDL_Window *window, SDL_GLContext context)
+{
+    window_impl_t   *impl;
+    EGLSurface      surface = NULL;
+
+    if (window) {
+        impl = (window_impl_t *)window->internal;
+        surface = impl->surface;
+    }
+
+    if (eglMakeCurrent(egl_disp, surface, surface, context) != EGL_TRUE) {
+        return false;
+    }
+
+    return true;
+}
+
+/**
+ * Destroys a context.
+ * @param   SDL_VideoDevice *_this
+ * @param   context The context to destroy
+ */
+bool glDeleteContext(SDL_VideoDevice *_this, SDL_GLContext context)
+{
+    eglDestroyContext(egl_disp, context);
+    return true;
+}
+
+/**
+ * Terminates access to the EGL library.
+ * @param   SDL_VideoDevice *_this
+ */
+void glUnloadLibrary(SDL_VideoDevice *_this)
+{
+    eglTerminate(egl_disp);
+}