104 lines
3.1 KiB
C
104 lines
3.1 KiB
C
/**
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* FreeRDP: A Remote Desktop Protocol Implementation
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* GDI Library
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*
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* Copyright 2010-2011 Marc-Andre Moreau <marcandre.moreau@gmail.com>
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef FREERDP_LIB_GDI_CORE_H
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#define FREERDP_LIB_GDI_CORE_H
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#include <winpr/cast.h>
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#include "graphics.h"
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#include "brush.h"
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#include <freerdp/api.h>
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WINPR_ATTR_NODISCARD
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FREERDP_LOCAL BOOL gdi_bitmap_update(rdpContext* context, const BITMAP_UPDATE* bitmapUpdate);
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FREERDP_LOCAL void gdi_bitmap_free_ex(gdiBitmap* bitmap);
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WINPR_ATTR_MALLOC(gdi_bitmap_free_ex, 1)
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WINPR_ATTR_NODISCARD
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FREERDP_LOCAL gdiBitmap* gdi_bitmap_new_ex(rdpGdi* gdi, int width, int height, int bpp, BYTE* data);
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WINPR_ATTR_NODISCARD
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static inline BYTE* gdi_get_bitmap_pointer(HGDI_DC hdcBmp, INT32 x, INT32 y)
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{
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HGDI_BITMAP hBmp = (HGDI_BITMAP)hdcBmp->selectedObject;
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if ((x >= 0) && (y >= 0) && (x < hBmp->width) && (y < hBmp->height))
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{
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BYTE* p = hBmp->data + (WINPR_ASSERTING_INT_CAST(size_t, y) * hBmp->scanline) +
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(WINPR_ASSERTING_INT_CAST(size_t, x) * FreeRDPGetBytesPerPixel(hdcBmp->format));
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return p;
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}
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else
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{
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WLog_ERR(FREERDP_TAG("gdi"),
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"gdi_get_bitmap_pointer: requesting invalid pointer: (%" PRId32 ",%" PRId32
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") in %" PRId32 "x%" PRId32 "",
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x, y, hBmp->width, hBmp->height);
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return nullptr;
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}
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}
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/**
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* Get current color in brush bitmap according to dest coordinates. msdn{dd183396}
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*
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* @param x dest x-coordinate
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* @param y dest y-coordinate
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* @return color pointer
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*/
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WINPR_ATTR_NODISCARD
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static inline BYTE* gdi_get_brush_pointer(HGDI_DC hdcBrush, UINT32 x, UINT32 y)
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{
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BYTE* p = nullptr;
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UINT32 brushStyle = gdi_GetBrushStyle(hdcBrush);
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switch (brushStyle)
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{
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case GDI_BS_PATTERN:
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case GDI_BS_HATCHED:
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{
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HGDI_BITMAP hBmpBrush = hdcBrush->brush->pattern;
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/* According to msdn{dd183396}, the system always positions a brush bitmap
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* at the brush origin and copy across the client area.
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* Calculate the offset of the mapped pixel in the brush bitmap according to
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* brush origin and dest coordinates */
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const UINT32 w = WINPR_ASSERTING_INT_CAST(UINT32, hBmpBrush->width);
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const UINT32 h = WINPR_ASSERTING_INT_CAST(UINT32, hBmpBrush->height);
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WINPR_ASSERT(w > 0);
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WINPR_ASSERT(h > 0);
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x = (x + w - (WINPR_ASSERTING_INT_CAST(UINT32, hdcBrush->brush->nXOrg) % w)) % w;
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y = (y + h - (WINPR_ASSERTING_INT_CAST(UINT32, hdcBrush->brush->nYOrg) % h)) % h;
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p = hBmpBrush->data + (1ULL * y * hBmpBrush->scanline) +
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(1ULL * x * FreeRDPGetBytesPerPixel(hBmpBrush->format));
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return p;
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}
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default:
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break;
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}
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p = (BYTE*)&(hdcBrush->textColor);
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return p;
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}
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#endif /* FREERDP_LIB_GDI_CORE_H */
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