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Diffstat (limited to 'include/pugl/detail/win_cairo.c')
| -rw-r--r-- | include/pugl/detail/win_cairo.c | 178 |
1 files changed, 178 insertions, 0 deletions
diff --git a/include/pugl/detail/win_cairo.c b/include/pugl/detail/win_cairo.c new file mode 100644 index 0000000..1b9afb9 --- /dev/null +++ b/include/pugl/detail/win_cairo.c @@ -0,0 +1,178 @@ +/* + Copyright 2012-2020 David Robillard <d@drobilla.net> + + Permission to use, copy, modify, and/or distribute this software for any + purpose with or without fee is hereby granted, provided that the above + copyright notice and this permission notice appear in all copies. + + THIS SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES + WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF + MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR + ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES + WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN + ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF + OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. +*/ + +/** + @file win_cairo.c + @brief Cairo graphics backend for Windows. +*/ + +#include "pugl/detail/stub.h" +#include "pugl/detail/types.h" +#include "pugl/detail/win.h" +#include "pugl/pugl_cairo.h" + +#include <cairo-win32.h> +#include <cairo.h> + +#include <stdlib.h> + +typedef struct { + cairo_surface_t* surface; + cairo_t* cr; + HDC drawDc; + HBITMAP drawBitmap; +} PuglWinCairoSurface; + +static PuglStatus +puglWinCairoCreateDrawContext(PuglView* view) +{ + PuglInternals* const impl = view->impl; + PuglWinCairoSurface* const surface = (PuglWinCairoSurface*)impl->surface; + + surface->drawDc = CreateCompatibleDC(impl->hdc); + surface->drawBitmap = CreateCompatibleBitmap( + impl->hdc, (int)view->frame.width, (int)view->frame.height); + + DeleteObject(SelectObject(surface->drawDc, surface->drawBitmap)); + + return PUGL_SUCCESS; +} + +static PuglStatus +puglWinCairoDestroyDrawContext(PuglView* view) +{ + PuglInternals* const impl = view->impl; + PuglWinCairoSurface* const surface = (PuglWinCairoSurface*)impl->surface; + + DeleteDC(surface->drawDc); + DeleteObject(surface->drawBitmap); + + surface->drawDc = NULL; + surface->drawBitmap = NULL; + + return PUGL_SUCCESS; +} + +static PuglStatus +puglWinCairoConfigure(PuglView* view) +{ + const PuglStatus st = puglWinStubConfigure(view); + + if (!st) { + view->impl->surface = (PuglWinCairoSurface*)calloc( + 1, sizeof(PuglWinCairoSurface)); + } + + return st; +} + +static void +puglWinCairoClose(PuglView* view) +{ + PuglInternals* const impl = view->impl; + PuglWinCairoSurface* const surface = (PuglWinCairoSurface*)impl->surface; + + cairo_surface_destroy(surface->surface); + + surface->surface = NULL; +} + +static PuglStatus +puglWinCairoOpen(PuglView* view) +{ + PuglInternals* const impl = view->impl; + PuglWinCairoSurface* const surface = (PuglWinCairoSurface*)impl->surface; + + cairo_status_t st = CAIRO_STATUS_SUCCESS; + if (!(surface->surface = cairo_win32_surface_create(surface->drawDc)) || + (st = cairo_surface_status(surface->surface)) || + !(surface->cr = cairo_create(surface->surface)) || + (st = cairo_status(surface->cr))) { + return PUGL_CREATE_CONTEXT_FAILED; + } + + return PUGL_SUCCESS; +} + +static PuglStatus +puglWinCairoDestroy(PuglView* view) +{ + PuglInternals* const impl = view->impl; + PuglWinCairoSurface* const surface = (PuglWinCairoSurface*)impl->surface; + + puglWinCairoClose(view); + puglWinCairoDestroyDrawContext(view); + free(surface); + impl->surface = NULL; + + return PUGL_SUCCESS; +} + +static PuglStatus +puglWinCairoEnter(PuglView* view, const PuglEventExpose* expose) +{ + PuglStatus st = PUGL_SUCCESS; + + if (expose && + !(st = puglWinCairoCreateDrawContext(view)) && + !(st = puglWinCairoOpen(view))) { + PAINTSTRUCT ps; + BeginPaint(view->impl->hwnd, &ps); + } + + return st; +} + +static PuglStatus +puglWinCairoLeave(PuglView* view, const PuglEventExpose* expose) +{ + PuglInternals* const impl = view->impl; + PuglWinCairoSurface* const surface = (PuglWinCairoSurface*)impl->surface; + + if (expose) { + cairo_surface_flush(surface->surface); + BitBlt(impl->hdc, + 0, 0, (int)view->frame.width, (int)view->frame.height, + surface->drawDc, 0, 0, SRCCOPY); + + puglWinCairoClose(view); + puglWinCairoDestroyDrawContext(view); + + PAINTSTRUCT ps; + EndPaint(view->impl->hwnd, &ps); + } + + return PUGL_SUCCESS; +} + +static void* +puglWinCairoGetContext(PuglView* view) +{ + return ((PuglWinCairoSurface*)view->impl->surface)->cr; +} + +const PuglBackend* +puglCairoBackend() +{ + static const PuglBackend backend = {puglWinCairoConfigure, + puglStubCreate, + puglWinCairoDestroy, + puglWinCairoEnter, + puglWinCairoLeave, + puglWinCairoGetContext}; + + return &backend; +} |