/* Cairo - a vector graphics library with display and print output * * 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 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): * Owen Taylor * Stuart Parmenter * Vladimir Vukicevic */ #include #include "cairoint.h" #include "cairo-win32-private.h" static const cairo_surface_backend_t cairo_win32_surface_backend; /** * _cairo_win32_print_gdi_error: * @context: context string to display along with the error * * Helper function to dump out a human readable form of the * current error code. * * Return value: A cairo status code for the error code **/ cairo_status_t _cairo_win32_print_gdi_error (const char *context) { void *lpMsgBuf; DWORD last_error = GetLastError (); if (!FormatMessageA (FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM, NULL, last_error, MAKELANGID (LANG_NEUTRAL, SUBLANG_DEFAULT), (LPTSTR) &lpMsgBuf, 0, NULL)) { fprintf (stderr, "%s: Unknown GDI error", context); } else { fprintf (stderr, "%s: %s", context, (char *)lpMsgBuf); LocalFree (lpMsgBuf); } /* We should switch off of last_status, but we'd either return * CAIRO_STATUS_NO_MEMORY or CAIRO_STATUS_UNKNOWN_ERROR and there * is no CAIRO_STATUS_UNKNOWN_ERROR. */ return CAIRO_STATUS_NO_MEMORY; } static cairo_status_t _create_dc_and_bitmap (cairo_win32_surface_t *surface, HDC original_dc, cairo_format_t format, int width, int height, char **bits_out, int *rowstride_out) { cairo_status_t status; BITMAPINFO *bitmap_info = NULL; struct { BITMAPINFOHEADER bmiHeader; RGBQUAD bmiColors[2]; } bmi_stack; void *bits; int num_palette = 0; /* Quiet GCC */ int i; surface->dc = NULL; surface->bitmap = NULL; switch (format) { case CAIRO_FORMAT_ARGB32: case CAIRO_FORMAT_RGB24: num_palette = 0; break; case CAIRO_FORMAT_A8: num_palette = 256; break; case CAIRO_FORMAT_A1: num_palette = 2; break; } if (num_palette > 2) { bitmap_info = malloc (sizeof (BITMAPINFOHEADER) + num_palette * sizeof (RGBQUAD)); if (!bitmap_info) return CAIRO_STATUS_NO_MEMORY; } else { bitmap_info = (BITMAPINFO *)&bmi_stack; } bitmap_info->bmiHeader.biSize = sizeof (BITMAPINFOHEADER); bitmap_info->bmiHeader.biWidth = width == 0 ? 1 : width; bitmap_info->bmiHeader.biHeight = height == 0 ? -1 : - height; /* top-down */ bitmap_info->bmiHeader.biSizeImage = 0; bitmap_info->bmiHeader.biXPelsPerMeter = 72. / 0.0254; /* unused here */ bitmap_info->bmiHeader.biYPelsPerMeter = 72. / 0.0254; /* unused here */ bitmap_info->bmiHeader.biPlanes = 1; switch (format) { case CAIRO_FORMAT_ARGB32: case CAIRO_FORMAT_RGB24: bitmap_info->bmiHeader.biBitCount = 32; bitmap_info->bmiHeader.biCompression = BI_RGB; bitmap_info->bmiHeader.biClrUsed = 0; /* unused */ bitmap_info->bmiHeader.biClrImportant = 0; break; case CAIRO_FORMAT_A8: bitmap_info->bmiHeader.biBitCount = 8; bitmap_info->bmiHeader.biCompression = BI_RGB; bitmap_info->bmiHeader.biClrUsed = 256; bitmap_info->bmiHeader.biClrImportant = 0; for (i = 0; i < 256; i++) { bitmap_info->bmiColors[i].rgbBlue = i; bitmap_info->bmiColors[i].rgbGreen = i; bitmap_info->bmiColors[i].rgbRed = i; bitmap_info->bmiColors[i].rgbReserved = 0; } break; case CAIRO_FORMAT_A1: bitmap_info->bmiHeader.biBitCount = 1; bitmap_info->bmiHeader.biCompression = BI_RGB; bitmap_info->bmiHeader.biClrUsed = 2; bitmap_info->bmiHeader.biClrImportant = 0; for (i = 0; i < 2; i++) { bitmap_info->bmiColors[i].rgbBlue = i * 255; bitmap_info->bmiColors[i].rgbGreen = i * 255; bitmap_info->bmiColors[i].rgbRed = i * 255; bitmap_info->bmiColors[i].rgbReserved = 0; break; } } surface->dc = CreateCompatibleDC (original_dc); if (!surface->dc) goto FAIL; surface->bitmap = CreateDIBSection (surface->dc, bitmap_info, DIB_RGB_COLORS, &bits, NULL, 0); if (!surface->bitmap) goto FAIL; surface->saved_dc_bitmap = SelectObject (surface->dc, surface->bitmap); if (!surface->saved_dc_bitmap) goto FAIL; if (bitmap_info && num_palette > 2) free (bitmap_info); if (bits_out) *bits_out = bits; if (rowstride_out) { /* Windows bitmaps are padded to 32-bit (dword) boundaries */ switch (format) { case CAIRO_FORMAT_ARGB32: case CAIRO_FORMAT_RGB24: *rowstride_out = 4 * width; break; case CAIRO_FORMAT_A8: *rowstride_out = (width + 3) & ~3; break; case CAIRO_FORMAT_A1: *rowstride_out = ((width + 31) & ~31) / 8; break; } } return CAIRO_STATUS_SUCCESS; FAIL: status = _cairo_win32_print_gdi_error ("_create_dc_and_bitmap"); if (bitmap_info && num_palette > 2) free (bitmap_info); if (surface->saved_dc_bitmap) { SelectObject (surface->dc, surface->saved_dc_bitmap); surface->saved_dc_bitmap = NULL; } if (surface->bitmap) { DeleteObject (surface->bitmap); surface->bitmap = NULL; } if (surface->dc) { DeleteDC (surface->dc); surface->dc = NULL; } return status; } static cairo_surface_t * _cairo_win32_surface_create_for_dc (HDC original_dc, cairo_format_t format, int width, int height) { cairo_status_t status; cairo_win32_surface_t *surface; char *bits; int rowstride; surface = malloc (sizeof (cairo_win32_surface_t)); if (surface == NULL) { _cairo_error (CAIRO_STATUS_NO_MEMORY); return &_cairo_surface_nil; } status = _create_dc_and_bitmap (surface, original_dc, format, width, height, &bits, &rowstride); if (status) goto FAIL; surface->image = cairo_image_surface_create_for_data (bits, format, width, height, rowstride); if (surface->image->status) { status = CAIRO_STATUS_NO_MEMORY; goto FAIL; } surface->format = format; surface->clip_rect.x = 0; surface->clip_rect.y = 0; surface->clip_rect.width = width; surface->clip_rect.height = height; surface->saved_clip = CreateRectRgn (0, 0, 0, 0); if (GetClipRgn (surface->dc, surface->saved_clip) == 0) { DeleteObject(surface->saved_clip); surface->saved_clip = NULL; } surface->extents = surface->clip_rect; _cairo_surface_init (&surface->base, &cairo_win32_surface_backend); return (cairo_surface_t *)surface; FAIL: if (surface->bitmap) { SelectObject (surface->dc, surface->saved_dc_bitmap); DeleteObject (surface->bitmap); DeleteDC (surface->dc); } if (surface) free (surface); if (status == CAIRO_STATUS_NO_MEMORY) { _cairo_error (CAIRO_STATUS_NO_MEMORY); return &_cairo_surface_nil; } else { _cairo_error (status); return &_cairo_surface_nil; } } static cairo_surface_t * _cairo_win32_surface_create_similar (void *abstract_src, cairo_content_t content, int width, int height) { cairo_win32_surface_t *src = abstract_src; cairo_format_t format = _cairo_format_from_content (content); return _cairo_win32_surface_create_for_dc (src->dc, format, width, height); } static cairo_status_t _cairo_win32_surface_finish (void *abstract_surface) { cairo_win32_surface_t *surface = abstract_surface; if (surface->image) cairo_surface_destroy (surface->image); if (surface->saved_clip) DeleteObject (surface->saved_clip); /* If we created the Bitmap and DC, destroy them */ if (surface->bitmap) { SelectObject (surface->dc, surface->saved_dc_bitmap); DeleteObject (surface->bitmap); DeleteDC (surface->dc); } return CAIRO_STATUS_SUCCESS; } static cairo_status_t _cairo_win32_surface_get_subimage (cairo_win32_surface_t *surface, int x, int y, int width, int height, cairo_win32_surface_t **local_out) { cairo_win32_surface_t *local; cairo_status_t status; cairo_content_t content = _cairo_content_from_format (surface->format); local = (cairo_win32_surface_t *) _cairo_win32_surface_create_similar (surface, content, width, height); if (local->base.status) return CAIRO_STATUS_NO_MEMORY; if (!BitBlt (local->dc, 0, 0, width, height, surface->dc, x, y, SRCCOPY)) { /* If we fail to BitBlt here, most likely the source is a printer. * You can't reliably get bits from a printer DC, so just fill in * the surface as white (common case for printing). */ RECT r; r.left = r.top = 0; r.right = width; r.bottom = height; FillRect(local->dc, &r, (HBRUSH)GetStockObject(WHITE_BRUSH)); } *local_out = local; return CAIRO_STATUS_SUCCESS; FAIL: status = _cairo_win32_print_gdi_error ("_cairo_win32_surface_get_subimage"); if (local) cairo_surface_destroy (&local->base); return status; } static cairo_status_t _cairo_win32_surface_acquire_source_image (void *abstract_surface, cairo_image_surface_t **image_out, void **image_extra) { cairo_win32_surface_t *surface = abstract_surface; cairo_win32_surface_t *local = NULL; cairo_status_t status; if (surface->image) { *image_out = (cairo_image_surface_t *)surface->image; *image_extra = NULL; return CAIRO_STATUS_SUCCESS; } status = _cairo_win32_surface_get_subimage (abstract_surface, 0, 0, surface->clip_rect.width, surface->clip_rect.height, &local); if (status) return status; *image_out = (cairo_image_surface_t *)local->image; *image_extra = local; return CAIRO_STATUS_SUCCESS; } static void _cairo_win32_surface_release_source_image (void *abstract_surface, cairo_image_surface_t *image, void *image_extra) { cairo_win32_surface_t *local = image_extra; if (local) cairo_surface_destroy ((cairo_surface_t *)local); } static cairo_status_t _cairo_win32_surface_acquire_dest_image (void *abstract_surface, cairo_rectangle_t *interest_rect, cairo_image_surface_t **image_out, cairo_rectangle_t *image_rect, void **image_extra) { cairo_win32_surface_t *surface = abstract_surface; cairo_win32_surface_t *local = NULL; cairo_status_t status; RECT clip_box; int x1, y1, x2, y2; if (surface->image) { image_rect->x = 0; image_rect->y = 0; image_rect->width = surface->clip_rect.width; image_rect->height = surface->clip_rect.height; *image_out = (cairo_image_surface_t *)surface->image; *image_extra = NULL; return CAIRO_STATUS_SUCCESS; } if (GetClipBox (surface->dc, &clip_box) == ERROR) return _cairo_win32_print_gdi_error ("_cairo_win3_surface_acquire_dest_image"); x1 = clip_box.left; x2 = clip_box.right; y1 = clip_box.top; y2 = clip_box.bottom; if (interest_rect->x > x1) x1 = interest_rect->x; if (interest_rect->y > y1) y1 = interest_rect->y; if (interest_rect->x + interest_rect->width < x2) x2 = interest_rect->x + interest_rect->width; if (interest_rect->y + interest_rect->height < y2) y2 = interest_rect->y + interest_rect->height; if (x1 >= x2 || y1 >= y2) { *image_out = NULL; *image_extra = NULL; return CAIRO_STATUS_SUCCESS; } status = _cairo_win32_surface_get_subimage (abstract_surface, x1, y1, x2 - x1, y2 - y1, &local); if (status) return status; *image_out = (cairo_image_surface_t *)local->image; *image_extra = local; image_rect->x = x1; image_rect->y = y1; image_rect->width = x2 - x1; image_rect->height = y2 - y1; return CAIRO_STATUS_SUCCESS; } static void _cairo_win32_surface_release_dest_image (void *abstract_surface, cairo_rectangle_t *interest_rect, cairo_image_surface_t *image, cairo_rectangle_t *image_rect, void *image_extra) { cairo_win32_surface_t *surface = abstract_surface; cairo_win32_surface_t *local = image_extra; if (!local) return; if (!BitBlt (surface->dc, image_rect->x, image_rect->y, image_rect->width, image_rect->height, local->dc, 0, 0, SRCCOPY)) _cairo_win32_print_gdi_error ("_cairo_win32_surface_release_dest_image"); cairo_surface_destroy ((cairo_surface_t *)local); } #if !defined(AC_SRC_OVER) #define AC_SRC_OVER 0x00 #pragma pack(1) typedef struct { BYTE BlendOp; BYTE BlendFlags; BYTE SourceConstantAlpha; BYTE AlphaFormat; }BLENDFUNCTION; #pragma pack() #endif /* for compatibility with VC++ 6 */ #ifndef AC_SRC_ALPHA #define AC_SRC_ALPHA 0x01 #endif typedef BOOL (WINAPI *cairo_alpha_blend_func_t) (HDC hdcDest, int nXOriginDest, int nYOriginDest, int nWidthDest, int hHeightDest, HDC hdcSrc, int nXOriginSrc, int nYOriginSrc, int nWidthSrc, int nHeightSrc, BLENDFUNCTION blendFunction); static cairo_int_status_t _composite_alpha_blend (cairo_win32_surface_t *dst, cairo_win32_surface_t *src, int alpha, int src_x, int src_y, int dst_x, int dst_y, int width, int height) { static unsigned alpha_blend_checked = FALSE; static cairo_alpha_blend_func_t alpha_blend = NULL; BLENDFUNCTION blend_function; /* Check for AlphaBlend dynamically to allow compiling on * MSVC 6 and use on older windows versions */ if (!alpha_blend_checked) { OSVERSIONINFO os; os.dwOSVersionInfoSize = sizeof (os); GetVersionEx (&os); /* If running on Win98, disable using AlphaBlend() * to avoid Win98 AlphaBlend() bug */ if (VER_PLATFORM_WIN32_WINDOWS != os.dwPlatformId || os.dwMajorVersion != 4 || os.dwMinorVersion != 10) { HMODULE msimg32_dll = LoadLibrary ("msimg32"); if (msimg32_dll != NULL) alpha_blend = (cairo_alpha_blend_func_t)GetProcAddress (msimg32_dll, "AlphaBlend"); } alpha_blend_checked = TRUE; } if (alpha_blend == NULL) return CAIRO_INT_STATUS_UNSUPPORTED; if (GetDeviceCaps(dst->dc, SHADEBLENDCAPS) == SB_NONE) return CAIRO_INT_STATUS_UNSUPPORTED; blend_function.BlendOp = AC_SRC_OVER; blend_function.BlendFlags = 0; blend_function.SourceConstantAlpha = alpha; blend_function.AlphaFormat = src->format == CAIRO_FORMAT_ARGB32 ? AC_SRC_ALPHA : 0; if (!alpha_blend (dst->dc, dst_x, dst_y, width, height, src->dc, src_x, src_y, width, height, blend_function)) return _cairo_win32_print_gdi_error ("_cairo_win32_surface_composite"); return CAIRO_STATUS_SUCCESS; } static cairo_int_status_t _cairo_win32_surface_composite (cairo_operator_t op, cairo_pattern_t *pattern, cairo_pattern_t *mask_pattern, void *abstract_dst, int src_x, int src_y, int mask_x, int mask_y, int dst_x, int dst_y, unsigned int width, unsigned int height) { cairo_win32_surface_t *dst = abstract_dst; cairo_win32_surface_t *src; cairo_surface_pattern_t *src_surface_pattern; int alpha; int integer_transform; int itx, ity; if (pattern->type != CAIRO_PATTERN_TYPE_SURFACE || pattern->extend != CAIRO_EXTEND_NONE) return CAIRO_INT_STATUS_UNSUPPORTED; if (mask_pattern) { /* FIXME: When we fully support RENDER style 4-channel * masks we need to check r/g/b != 1.0. */ if (mask_pattern->type != CAIRO_PATTERN_TYPE_SOLID) return CAIRO_INT_STATUS_UNSUPPORTED; alpha = ((cairo_solid_pattern_t *)mask_pattern)->color.alpha_short >> 8; } else { alpha = 255; } src_surface_pattern = (cairo_surface_pattern_t *)pattern; src = (cairo_win32_surface_t *)src_surface_pattern->surface; if (src->base.backend != dst->base.backend) return CAIRO_INT_STATUS_UNSUPPORTED; integer_transform = _cairo_matrix_is_integer_translation (&pattern->matrix, &itx, &ity); if (!integer_transform) return CAIRO_INT_STATUS_UNSUPPORTED; /* Fix up src coordinates; the src coords and size must be within the * bounds of the source surface. * XXX the region not covered should be appropriately rendered! * - for OVER/SOURCE with RGB24 source -> opaque black * - for SOURCE with ARGB32 source -> 100% transparent black */ src_x += itx; src_y += ity; if (src_x < 0) { width += src_x; dst_x -= src_x; src_x = 0; } if (src_y < 0) { height += src_y; dst_y -= src_y; src_y = 0; } if (src_x + width > src->extents.width) width = src->extents.width - src_x; if (src_y + height > src->extents.height) height = src->extents.height - src_y; if (alpha == 255 && src->format == dst->format && (op == CAIRO_OPERATOR_SOURCE || (src->format == CAIRO_FORMAT_RGB24 && op == CAIRO_OPERATOR_OVER))) { if (!BitBlt (dst->dc, dst_x, dst_y, width, height, src->dc, src_x, src_y, SRCCOPY)) return _cairo_win32_print_gdi_error ("_cairo_win32_surface_composite"); return CAIRO_STATUS_SUCCESS; } else if (integer_transform && (src->format == CAIRO_FORMAT_RGB24 || src->format == CAIRO_FORMAT_ARGB32) && dst->format == CAIRO_FORMAT_RGB24 && op == CAIRO_OPERATOR_OVER) { return _composite_alpha_blend (dst, src, alpha, src_x, src_y, dst_x, dst_y, width, height); } return CAIRO_INT_STATUS_UNSUPPORTED; } /* This big function tells us how to optimize operators for the * case of solid destination and constant-alpha source * * NOTE: This function needs revisiting if we add support for * super-luminescent colors (a == 0, r,g,b > 0) */ static enum { DO_CLEAR, DO_SOURCE, DO_NOTHING, DO_UNSUPPORTED } categorize_solid_dest_operator (cairo_operator_t op, unsigned short alpha) { enum { SOURCE_TRANSPARENT, SOURCE_LIGHT, SOURCE_SOLID, SOURCE_OTHER } source; if (alpha >= 0xff00) source = SOURCE_SOLID; else if (alpha < 0x100) source = SOURCE_TRANSPARENT; else source = SOURCE_OTHER; switch (op) { case CAIRO_OPERATOR_CLEAR: /* 0 0 */ case CAIRO_OPERATOR_OUT: /* 1 - Ab 0 */ return DO_CLEAR; break; case CAIRO_OPERATOR_SOURCE: /* 1 0 */ case CAIRO_OPERATOR_IN: /* Ab 0 */ return DO_SOURCE; break; case CAIRO_OPERATOR_OVER: /* 1 1 - Aa */ case CAIRO_OPERATOR_ATOP: /* Ab 1 - Aa */ if (source == SOURCE_SOLID) return DO_SOURCE; else if (source == SOURCE_TRANSPARENT) return DO_NOTHING; else return DO_UNSUPPORTED; break; case CAIRO_OPERATOR_DEST_OUT: /* 0 1 - Aa */ case CAIRO_OPERATOR_XOR: /* 1 - Ab 1 - Aa */ if (source == SOURCE_SOLID) return DO_CLEAR; else if (source == SOURCE_TRANSPARENT) return DO_NOTHING; else return DO_UNSUPPORTED; break; case CAIRO_OPERATOR_DEST: /* 0 1 */ case CAIRO_OPERATOR_DEST_OVER:/* 1 - Ab 1 */ case CAIRO_OPERATOR_SATURATE: /* min(1,(1-Ab)/Aa) 1 */ return DO_NOTHING; break; case CAIRO_OPERATOR_DEST_IN: /* 0 Aa */ case CAIRO_OPERATOR_DEST_ATOP:/* 1 - Ab Aa */ if (source == SOURCE_SOLID) return DO_NOTHING; else if (source == SOURCE_TRANSPARENT) return DO_CLEAR; else return DO_UNSUPPORTED; break; case CAIRO_OPERATOR_ADD: /* 1 1 */ if (source == SOURCE_TRANSPARENT) return DO_NOTHING; else return DO_UNSUPPORTED; break; } ASSERT_NOT_REACHED; return DO_UNSUPPORTED; } static cairo_int_status_t _cairo_win32_surface_fill_rectangles (void *abstract_surface, cairo_operator_t op, const cairo_color_t *color, cairo_rectangle_t *rects, int num_rects) { cairo_win32_surface_t *surface = abstract_surface; cairo_status_t status; COLORREF new_color; HBRUSH new_brush; int i; /* If we have a local image, use the fallback code; it will be as fast * as calling out to GDI. */ if (surface->image) return CAIRO_INT_STATUS_UNSUPPORTED; /* Optimize for no destination alpha (surface->pixman_image is non-NULL for all * surfaces with alpha.) */ switch (categorize_solid_dest_operator (op, color->alpha_short)) { case DO_CLEAR: new_color = RGB (0, 0, 0); break; case DO_SOURCE: new_color = RGB (color->red_short >> 8, color->green_short >> 8, color->blue_short >> 8); break; case DO_NOTHING: return CAIRO_STATUS_SUCCESS; case DO_UNSUPPORTED: default: return CAIRO_INT_STATUS_UNSUPPORTED; } new_brush = CreateSolidBrush (new_color); if (!new_brush) return _cairo_win32_print_gdi_error ("_cairo_win32_surface_fill_rectangles"); for (i = 0; i < num_rects; i++) { RECT rect; rect.left = rects[i].x; rect.top = rects[i].y; rect.right = rects[i].x + rects[i].width; rect.bottom = rects[i].y + rects[i].height; if (!FillRect (surface->dc, &rect, new_brush)) goto FAIL; } DeleteObject (new_brush); return CAIRO_STATUS_SUCCESS; FAIL: status = _cairo_win32_print_gdi_error ("_cairo_win32_surface_fill_rectangles"); DeleteObject (new_brush); return status; } static cairo_int_status_t _cairo_win32_surface_set_clip_region (void *abstract_surface, pixman_region16_t *region) { cairo_win32_surface_t *surface = abstract_surface; cairo_status_t status; /* If we are in-memory, then we set the clip on the image surface * as well as on the underlying GDI surface. */ if (surface->image) { unsigned int serial; serial = _cairo_surface_allocate_clip_serial (surface->image); _cairo_surface_set_clip_region (surface->image, region, serial); } /* The semantics we want is that any clip set by cairo combines * is intersected with the clip on device context that the * surface was created for. To implement this, we need to * save the original clip when first setting a clip on surface. */ if (region == NULL) { /* Clear any clip set by cairo, return to the original */ if (SelectClipRgn (surface->dc, surface->saved_clip) == ERROR) return _cairo_win32_print_gdi_error ("_cairo_win32_surface_set_clip_region (reset)"); return CAIRO_STATUS_SUCCESS; } else { pixman_box16_t *boxes = pixman_region_rects (region); int num_boxes = pixman_region_num_rects (region); pixman_box16_t *extents = pixman_region_extents (region); RGNDATA *data; size_t data_size; RECT *rects; int i; HRGN gdi_region; /* Create a GDI region for the cairo region */ data_size = sizeof (RGNDATAHEADER) + num_boxes * sizeof (RECT); data = malloc (data_size); if (!data) return CAIRO_STATUS_NO_MEMORY; rects = (RECT *)data->Buffer; data->rdh.dwSize = sizeof (RGNDATAHEADER); data->rdh.iType = RDH_RECTANGLES; data->rdh.nCount = num_boxes; data->rdh.nRgnSize = num_boxes * sizeof (RECT); data->rdh.rcBound.left = extents->x1; data->rdh.rcBound.top = extents->y1; data->rdh.rcBound.right = extents->x2; data->rdh.rcBound.bottom = extents->y2; for (i = 0; i < num_boxes; i++) { rects[i].left = boxes[i].x1; rects[i].top = boxes[i].y1; rects[i].right = boxes[i].x2; rects[i].bottom = boxes[i].y2; } gdi_region = ExtCreateRegion (NULL, data_size, data); free (data); if (!gdi_region) return CAIRO_STATUS_NO_MEMORY; /* Combine the new region with the original clip */ if (surface->saved_clip) { if (CombineRgn (gdi_region, gdi_region, surface->saved_clip, RGN_AND) == ERROR) goto FAIL; } if (SelectClipRgn (surface->dc, gdi_region) == ERROR) goto FAIL; DeleteObject (gdi_region); return CAIRO_STATUS_SUCCESS; FAIL: status = _cairo_win32_print_gdi_error ("_cairo_win32_surface_set_clip_region"); DeleteObject (gdi_region); return status; } } static cairo_int_status_t _cairo_win32_surface_get_extents (void *abstract_surface, cairo_rectangle_t *rectangle) { cairo_win32_surface_t *surface = abstract_surface; *rectangle = surface->extents; return CAIRO_STATUS_SUCCESS; } static cairo_status_t _cairo_win32_surface_flush (void *abstract_surface) { return _cairo_surface_reset_clip (abstract_surface); } /** * cairo_win32_surface_create: * @hdc: the DC to create a surface for * * Creates a cairo surface that targets the given DC. The DC will be * queried for its initial clip extents, and this will be used as the * size of the cairo surface. Also, if the DC is a raster DC, it will * be queried for its pixel format and the cairo surface format will * be set appropriately. * * Return value: the newly created surface **/ cairo_surface_t * cairo_win32_surface_create (HDC hdc) { cairo_win32_surface_t *surface; RECT rect; int depth; cairo_format_t format; /* Try to figure out the drawing bounds for the Device context */ if (GetClipBox (hdc, &rect) == ERROR) { _cairo_win32_print_gdi_error ("cairo_win32_surface_create"); /* XXX: Can we make a more reasonable guess at the error cause here? */ _cairo_error (CAIRO_STATUS_NO_MEMORY); return &_cairo_surface_nil; } if (GetDeviceCaps(hdc, TECHNOLOGY) == DT_RASDISPLAY) { depth = GetDeviceCaps(hdc, BITSPIXEL); if (depth == 32) format = CAIRO_FORMAT_ARGB32; else if (depth == 24) format = CAIRO_FORMAT_RGB24; else if (depth == 16) format = CAIRO_FORMAT_RGB24; else if (depth == 8) format = CAIRO_FORMAT_A8; else if (depth == 1) format = CAIRO_FORMAT_A1; else { _cairo_win32_print_gdi_error("cairo_win32_surface_create(bad BITSPIXEL)"); _cairo_error (CAIRO_STATUS_NO_MEMORY); return &_cairo_surface_nil; } } else { format = CAIRO_FORMAT_RGB24; } surface = malloc (sizeof (cairo_win32_surface_t)); if (surface == NULL) { _cairo_error (CAIRO_STATUS_NO_MEMORY); return &_cairo_surface_nil; } surface->image = NULL; surface->format = format; surface->dc = hdc; surface->bitmap = NULL; surface->saved_dc_bitmap = NULL; surface->clip_rect.x = rect.left; surface->clip_rect.y = rect.top; surface->clip_rect.width = rect.right - rect.left; surface->clip_rect.height = rect.bottom - rect.top; if (surface->clip_rect.width == 0 || surface->clip_rect.height == 0) { surface->saved_clip = NULL; } else { surface->saved_clip = CreateRectRgn (0, 0, 0, 0); if (GetClipRgn (hdc, surface->saved_clip) == 0) { DeleteObject(surface->saved_clip); surface->saved_clip = NULL; } } surface->extents = surface->clip_rect; _cairo_surface_init (&surface->base, &cairo_win32_surface_backend); return (cairo_surface_t *)surface; } /** * cairo_win32_surface_create_with_dib: * @format: format of pixels in the surface to create * @width: width of the surface, in pixels * @height: height of the surface, in pixels * * Creates a device-independent-bitmap surface not associated with * any particular existing surface or device context. The created * bitmap will be unititialized. * * Return value: the newly created surface * **/ cairo_surface_t * cairo_win32_surface_create_with_dib (cairo_format_t format, int width, int height) { return _cairo_win32_surface_create_for_dc (NULL, format, width, height); } /** * _cairo_surface_is_win32: * @surface: a #cairo_surface_t * * Checks if a surface is an #cairo_win32_surface_t * * Return value: True if the surface is an win32 surface **/ int _cairo_surface_is_win32 (cairo_surface_t *surface) { return surface->backend == &cairo_win32_surface_backend; } /** * cairo_win32_surface_get_dc * @surface: a #cairo_surface_t * * Returns the HDC associated with this surface, or NULL if none. * Also returns NULL if the surface is not a win32 surface. * * Return value: HDC or NULL if no HDC available. **/ HDC cairo_win32_surface_get_dc (cairo_surface_t *surface) { cairo_win32_surface_t *winsurf; if (surface == NULL) return NULL; if (!_cairo_surface_is_win32(surface)) return NULL; winsurf = (cairo_win32_surface_t *) surface; return winsurf->dc; } static const cairo_surface_backend_t cairo_win32_surface_backend = { CAIRO_SURFACE_TYPE_WIN32, _cairo_win32_surface_create_similar, _cairo_win32_surface_finish, _cairo_win32_surface_acquire_source_image, _cairo_win32_surface_release_source_image, _cairo_win32_surface_acquire_dest_image, _cairo_win32_surface_release_dest_image, NULL, /* clone_similar */ _cairo_win32_surface_composite, _cairo_win32_surface_fill_rectangles, NULL, /* composite_trapezoids */ NULL, /* copy_page */ NULL, /* show_page */ _cairo_win32_surface_set_clip_region, NULL, /* intersect_clip_path */ _cairo_win32_surface_get_extents, NULL, /* old_show_glyphs */ NULL, /* get_font_options */ _cairo_win32_surface_flush, NULL /* mark_dirty_rectangle */ }; /* * Without pthread, on win32 we need to initialize all the 'mutex'es * before use. It is guaranteed that DllMain will get called single * threaded before any other function. * Initializing more than finally needed should not matter much. */ #ifndef HAVE_PTHREAD_H CRITICAL_SECTION cairo_toy_font_face_hash_table_mutex; CRITICAL_SECTION cairo_scaled_font_map_mutex; CRITICAL_SECTION cairo_ft_unscaled_font_map_mutex; BOOL WINAPI DllMain (HINSTANCE hinstDLL, DWORD fdwReason, LPVOID lpvReserved) { switch (fdwReason) { case DLL_PROCESS_ATTACH: /* every 'mutex' from CAIRO_MUTEX_DECALRE needs to be initialized here */ InitializeCriticalSection (&cairo_toy_font_face_hash_table_mutex); InitializeCriticalSection (&cairo_scaled_font_map_mutex); InitializeCriticalSection (&cairo_ft_unscaled_font_map_mutex); break; case DLL_PROCESS_DETACH: DeleteCriticalSection (&cairo_toy_font_face_hash_table_mutex); DeleteCriticalSection (&cairo_scaled_font_map_mutex); DeleteCriticalSection (&cairo_ft_unscaled_font_map_mutex); break; } return TRUE; } #endif