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Diffstat (limited to 'libs/cairo-1.16.0/src/cairo-wgl-context.c')
-rw-r--r--libs/cairo-1.16.0/src/cairo-wgl-context.c261
1 files changed, 261 insertions, 0 deletions
diff --git a/libs/cairo-1.16.0/src/cairo-wgl-context.c b/libs/cairo-1.16.0/src/cairo-wgl-context.c
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index 0000000..4872374
--- /dev/null
+++ b/libs/cairo-1.16.0/src/cairo-wgl-context.c
@@ -0,0 +1,261 @@
+/* cairo - a vector graphics library with display and print output
+ *
+ * Copyright © 2009 Eric Anholt
+ * Copyright © 2009 Chris Wilson
+ * Copyright © 2005 Red Hat, Inc
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it either under the terms of the GNU Lesser General Public
+ * License version 2.1 as published by the Free Software Foundation
+ * (the "LGPL") or, at your option, under the terms of the Mozilla
+ * Public License Version 1.1 (the "MPL"). If you do not alter this
+ * notice, a recipient may use your version of this file under either
+ * the MPL or the LGPL.
+ *
+ * You should have received a copy of the LGPL along with this library
+ * in the file COPYING-LGPL-2.1; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Suite 500, Boston, MA 02110-1335, USA
+ * You should have received a copy of the MPL along with this library
+ * in the file COPYING-MPL-1.1
+ *
+ * The contents of this file are subject to the Mozilla Public License
+ * Version 1.1 (the "License"); you may not use this file except in
+ * compliance with the License. You may obtain a copy of the License at
+ * http://www.mozilla.org/MPL/
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY
+ * OF ANY KIND, either express or implied. See the LGPL or the MPL for
+ * the specific language governing rights and limitations.
+ *
+ * The Original Code is the cairo graphics library.
+ *
+ * The Initial Developer of the Original Code is Red Hat, Inc.
+ *
+ * Contributor(s):
+ * Carl Worth <cworth@cworth.org>
+ * Chris Wilson <chris@chris-wilson.co.uk>
+ * Zoxc <zoxc32@gmail.com>
+ */
+
+#include "cairoint.h"
+
+#include "cairo-gl-private.h"
+
+#include "cairo-error-private.h"
+
+#define WIN32_LEAN_AND_MEAN
+#include <windows.h>
+
+typedef struct _cairo_wgl_context {
+ cairo_gl_context_t base;
+
+ HDC dummy_dc;
+ HWND dummy_wnd;
+ HGLRC rc;
+
+ HDC prev_dc;
+ HGLRC prev_rc;
+} cairo_wgl_context_t;
+
+typedef struct _cairo_wgl_surface {
+ cairo_gl_surface_t base;
+
+ HDC dc;
+} cairo_wgl_surface_t;
+
+static void
+_wgl_acquire (void *abstract_ctx)
+{
+ cairo_wgl_context_t *ctx = abstract_ctx;
+
+ HDC current_dc;
+
+ ctx->prev_dc = wglGetCurrentDC ();
+ ctx->prev_rc = wglGetCurrentContext ();
+
+ if (ctx->base.current_target == NULL ||
+ _cairo_gl_surface_is_texture (ctx->base.current_target))
+ {
+ current_dc = ctx->dummy_dc;
+ }
+ else
+ {
+ cairo_wgl_surface_t *surface = (cairo_wgl_surface_t *) ctx->base.current_target;
+ current_dc = surface->dc;
+ }
+
+ if (ctx->prev_dc != current_dc ||
+ (ctx->prev_rc != ctx->rc &&
+ current_dc != ctx->dummy_dc))
+ {
+ wglMakeCurrent (current_dc, ctx->rc);
+ }
+}
+
+static void
+_wgl_make_current (void *abstract_ctx, cairo_gl_surface_t *abstract_surface)
+{
+ cairo_wgl_context_t *ctx = abstract_ctx;
+ cairo_wgl_surface_t *surface = (cairo_wgl_surface_t *) abstract_surface;
+
+ /* Set the window as the target of our context. */
+ wglMakeCurrent (surface->dc, ctx->rc);
+}
+
+static void
+_wgl_release (void *abstract_ctx)
+{
+ cairo_wgl_context_t *ctx = abstract_ctx;
+
+ if (ctx->prev_dc != wglGetCurrentDC () ||
+ ctx->prev_rc != wglGetCurrentContext ())
+ {
+ wglMakeCurrent (ctx->prev_dc,
+ ctx->prev_rc);
+ }
+}
+
+static void
+_wgl_swap_buffers (void *abstract_ctx,
+ cairo_gl_surface_t *abstract_surface)
+{
+ cairo_wgl_surface_t *surface = (cairo_wgl_surface_t *) abstract_surface;
+
+ SwapBuffers (surface->dc);
+}
+
+static void
+_wgl_destroy (void *abstract_ctx)
+{
+ cairo_wgl_context_t *ctx = abstract_ctx;
+
+ if (ctx->dummy_dc != 0) {
+ wglMakeCurrent (ctx->dummy_dc, 0);
+ ReleaseDC (ctx->dummy_wnd, ctx->dummy_dc);
+ DestroyWindow (ctx->dummy_wnd);
+ }
+}
+
+static cairo_status_t
+_wgl_dummy_ctx (cairo_wgl_context_t *ctx)
+{
+ WNDCLASSEXA wincl;
+ PIXELFORMATDESCRIPTOR pfd;
+ int format;
+ HDC dc;
+
+ ZeroMemory (&wincl, sizeof (WNDCLASSEXA));
+ wincl.cbSize = sizeof (WNDCLASSEXA);
+ wincl.hInstance = GetModuleHandle (0);
+ wincl.lpszClassName = "cairo_wgl_context_dummy";
+ wincl.lpfnWndProc = DefWindowProcA;
+ wincl.style = CS_OWNDC;
+
+ RegisterClassExA (&wincl);
+
+ ctx->dummy_wnd = CreateWindowA ("cairo_wgl_context_dummy", 0, 0, 0, 0, 0, 0, 0, 0, 0, 0);
+ ctx->dummy_dc = GetDC (ctx->dummy_wnd);
+
+ ZeroMemory (&pfd, sizeof (PIXELFORMATDESCRIPTOR));
+ pfd.nSize = sizeof (PIXELFORMATDESCRIPTOR);
+ pfd.nVersion = 1;
+ pfd.dwFlags = PFD_DRAW_TO_WINDOW | PFD_SUPPORT_OPENGL | PFD_DOUBLEBUFFER;
+ pfd.iPixelType = PFD_TYPE_RGBA;
+ pfd.cColorBits = 24;
+ pfd.cDepthBits = 16;
+ pfd.iLayerType = PFD_MAIN_PLANE;
+
+ format = ChoosePixelFormat (ctx->dummy_dc, &pfd);
+ SetPixelFormat (ctx->dummy_dc, format, &pfd);
+
+ wglMakeCurrent(ctx->dummy_dc, ctx->rc);
+
+ return CAIRO_STATUS_SUCCESS;
+}
+
+cairo_device_t *
+cairo_wgl_device_create (HGLRC rc)
+{
+ cairo_wgl_context_t *ctx;
+ cairo_status_t status;
+
+ ctx = calloc (1, sizeof (cairo_wgl_context_t));
+ if (unlikely (ctx == NULL))
+ return _cairo_gl_context_create_in_error (CAIRO_STATUS_NO_MEMORY);
+
+ ctx->rc = rc;
+ ctx->prev_dc = 0;
+ ctx->prev_rc = 0;
+
+ status = _wgl_dummy_ctx (ctx);
+ if (unlikely (status)) {
+ free (ctx);
+ return _cairo_gl_context_create_in_error (status);
+ }
+
+ ctx->base.acquire = _wgl_acquire;
+ ctx->base.release = _wgl_release;
+ ctx->base.make_current = _wgl_make_current;
+ ctx->base.swap_buffers = _wgl_swap_buffers;
+ ctx->base.destroy = _wgl_destroy;
+
+ status = _cairo_gl_dispatch_init (&ctx->base.dispatch,
+ (cairo_gl_get_proc_addr_func_t) wglGetProcAddress);
+ if (unlikely (status)) {
+ free (ctx);
+ return _cairo_gl_context_create_in_error (status);
+ }
+
+ status = _cairo_gl_context_init (&ctx->base);
+ if (unlikely (status)) {
+ free (ctx);
+ return _cairo_gl_context_create_in_error (status);
+ }
+
+ ctx->base.release (ctx);
+
+ return &ctx->base.base;
+}
+
+HGLRC
+cairo_wgl_device_get_context (cairo_device_t *device)
+{
+ cairo_wgl_context_t *ctx;
+
+ if (device->backend->type != CAIRO_DEVICE_TYPE_GL) {
+ _cairo_error_throw (CAIRO_STATUS_DEVICE_TYPE_MISMATCH);
+ return NULL;
+ }
+
+ ctx = (cairo_wgl_context_t *) device;
+
+ return ctx->rc;
+}
+
+cairo_surface_t *
+cairo_gl_surface_create_for_dc (cairo_device_t *device,
+ HDC dc,
+ int width,
+ int height)
+{
+ cairo_wgl_surface_t *surface;
+
+ if (unlikely (device->status))
+ return _cairo_surface_create_in_error (device->status);
+
+ if (device->backend->type != CAIRO_DEVICE_TYPE_GL)
+ return _cairo_surface_create_in_error (_cairo_error (CAIRO_STATUS_SURFACE_TYPE_MISMATCH));
+
+ if (width <= 0 || height <= 0)
+ return _cairo_surface_create_in_error (_cairo_error (CAIRO_STATUS_INVALID_SIZE));
+
+ surface = calloc (1, sizeof (cairo_wgl_surface_t));
+ if (unlikely (surface == NULL))
+ return _cairo_surface_create_in_error (_cairo_error (CAIRO_STATUS_NO_MEMORY));
+
+ _cairo_gl_surface_init (device, &surface->base,
+ CAIRO_CONTENT_COLOR_ALPHA, width, height);
+ surface->dc = dc;
+
+ return &surface->base.base;
+}
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