| 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; |
| } |