ReactOS 0.4.16-dev-197-g92996da
alphablend.c
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1/*
2 * COPYRIGHT: See COPYING in the top level directory
3 * PROJECT: ReactOS kernel
4 * PURPOSE: GDI alpha blending functions
5 * FILE: win32ss/gdi/eng/alphablend.c
6 * PROGRAMER: Jason Filby
7 */
8
9#include <win32k.h>
10
11#define NDEBUG
12#include <debug.h>
13
14
15/*
16 * @implemented
17 */
18BOOL
21 _Inout_ SURFOBJ *psoDest,
22 _In_ SURFOBJ *psoSource,
23 _In_opt_ CLIPOBJ *ClipRegion,
24 _In_opt_ XLATEOBJ *ColorTranslation,
25 _In_ RECTL *DestRect,
26 _In_ RECTL *SourceRect,
27 _In_ BLENDOBJ *BlendObj)
28{
29 RECTL InputRect;
30 RECTL OutputRect;
31 RECTL ClipRect;
32 RECTL CombinedRect;
33 RECTL Rect;
34 POINTL Translate;
35 INTENG_ENTER_LEAVE EnterLeaveSource;
36 INTENG_ENTER_LEAVE EnterLeaveDest;
37 SURFOBJ* InputObj;
38 SURFOBJ* OutputObj;
39 LONG ClippingType;
40 RECT_ENUM RectEnum;
41 BOOL EnumMore;
42 ULONG i;
43 BOOLEAN Ret;
44
45 DPRINT("EngAlphaBlend(psoDest:0x%p, psoSource:0x%p, ClipRegion:0x%p, ColorTranslation:0x%p,\n", psoDest, psoSource, ClipRegion, ColorTranslation);
46 DPRINT(" DestRect:{0x%x, 0x%x, 0x%x, 0x%x}, SourceRect:{0x%x, 0x%x, 0x%x, 0x%x},\n",
47 DestRect->left, DestRect->top, DestRect->right, DestRect->bottom,
48 SourceRect->left, SourceRect->top, SourceRect->right, SourceRect->bottom);
49 DPRINT(" BlendObj:{0x%x, 0x%x, 0x%x, 0x%x}\n", BlendObj->BlendFunction.BlendOp,
50 BlendObj->BlendFunction.BlendFlags, BlendObj->BlendFunction.SourceConstantAlpha,
51 BlendObj->BlendFunction.AlphaFormat);
52
53 /* Validate output */
54 OutputRect = *DestRect;
55 RECTL_vMakeWellOrdered(&OutputRect);
56
57 /* Validate input */
58 InputRect = *SourceRect;
59 RECTL_vMakeWellOrdered(&InputRect);
60 if ( (InputRect.top < 0) || (InputRect.bottom < 0) ||
61 (InputRect.left < 0) || (InputRect.right < 0) ||
62 InputRect.right > psoSource->sizlBitmap.cx ||
63 InputRect.bottom > psoSource->sizlBitmap.cy )
64 {
66 return FALSE;
67 }
68
69 if (psoDest == psoSource &&
70 !(OutputRect.left >= SourceRect->right || InputRect.left >= OutputRect.right ||
71 OutputRect.top >= SourceRect->bottom || InputRect.top >= OutputRect.bottom))
72 {
73 DPRINT1("Source and destination rectangles overlap!\n");
74 return FALSE;
75 }
76
77 if (BlendObj->BlendFunction.BlendOp != AC_SRC_OVER)
78 {
79 DPRINT1("BlendOp != AC_SRC_OVER (0x%x)\n", BlendObj->BlendFunction.BlendOp);
80 return FALSE;
81 }
82 if (BlendObj->BlendFunction.BlendFlags != 0)
83 {
84 DPRINT1("BlendFlags != 0 (0x%x)\n", BlendObj->BlendFunction.BlendFlags);
85 return FALSE;
86 }
87 if ((BlendObj->BlendFunction.AlphaFormat & ~AC_SRC_ALPHA) != 0)
88 {
89 DPRINT1("Unsupported AlphaFormat (0x%x)\n", BlendObj->BlendFunction.AlphaFormat);
90 return FALSE;
91 }
92
93 /* Check if there is anything to draw */
94 if (ClipRegion != NULL &&
95 (ClipRegion->rclBounds.left >= ClipRegion->rclBounds.right ||
96 ClipRegion->rclBounds.top >= ClipRegion->rclBounds.bottom))
97 {
98 /* Nothing to do */
99 return TRUE;
100 }
101
102 /* Now call the DIB function */
103 if (!IntEngEnter(&EnterLeaveSource, psoSource, &InputRect, TRUE, &Translate, &InputObj))
104 {
105 return FALSE;
106 }
107 InputRect.left += Translate.x;
108 InputRect.right += Translate.x;
109 InputRect.top += Translate.y;
110 InputRect.bottom += Translate.y;
111
112 if (!IntEngEnter(&EnterLeaveDest, psoDest, &OutputRect, FALSE, &Translate, &OutputObj))
113 {
114 IntEngLeave(&EnterLeaveSource);
115 return FALSE;
116 }
117 OutputRect.left += Translate.x;
118 OutputRect.right += Translate.x;
119 OutputRect.top += Translate.y;
120 OutputRect.bottom += Translate.y;
121
122 ASSERT(InputRect.left <= InputRect.right && InputRect.top <= InputRect.bottom);
123
124 Ret = FALSE;
125 ClippingType = (ClipRegion == NULL) ? DC_TRIVIAL : ClipRegion->iDComplexity;
126 switch (ClippingType)
127 {
128 case DC_TRIVIAL:
130 OutputObj, InputObj, &OutputRect, &InputRect, ClipRegion, ColorTranslation, BlendObj);
131 break;
132
133 case DC_RECT:
134 Ret = TRUE;
135 ClipRect.left = ClipRegion->rclBounds.left + Translate.x;
136 ClipRect.right = ClipRegion->rclBounds.right + Translate.x;
137 ClipRect.top = ClipRegion->rclBounds.top + Translate.y;
138 ClipRect.bottom = ClipRegion->rclBounds.bottom + Translate.y;
139 if (RECTL_bIntersectRect(&CombinedRect, &OutputRect, &ClipRect))
140 {
141 /* take into acount clipping results when calculating new input rect (scaled to input rect size) */
142 Rect.left = InputRect.left + (CombinedRect.left - OutputRect.left) * (InputRect.right - InputRect.left) / (OutputRect.right - OutputRect.left);
143 Rect.right = InputRect.right + (CombinedRect.right - OutputRect.right) * (InputRect.right - InputRect.left) / (OutputRect.right - OutputRect.left);
144 Rect.top = InputRect.top + (CombinedRect.top - OutputRect.top) * (InputRect.bottom - InputRect.top) / (OutputRect.bottom - OutputRect.top);
145 Rect.bottom = InputRect.bottom + (CombinedRect.bottom - OutputRect.bottom) * (InputRect.bottom - InputRect.top) / (OutputRect.bottom - OutputRect.top);
146
147 /* Aplha blend one rect */
149 OutputObj, InputObj, &CombinedRect, &Rect, ClipRegion, ColorTranslation, BlendObj);
150 }
151 break;
152
153 case DC_COMPLEX:
154 Ret = TRUE;
156 do
157 {
158 EnumMore = CLIPOBJ_bEnum(ClipRegion,(ULONG) sizeof(RectEnum),
159 (PVOID) &RectEnum);
160
161 for (i = 0; i < RectEnum.c; i++)
162 {
163 ClipRect.left = RectEnum.arcl[i].left + Translate.x;
164 ClipRect.right = RectEnum.arcl[i].right + Translate.x;
165 ClipRect.top = RectEnum.arcl[i].top + Translate.y;
166 ClipRect.bottom = RectEnum.arcl[i].bottom + Translate.y;
167 if (RECTL_bIntersectRect(&CombinedRect, &OutputRect, &ClipRect))
168 {
169 /* take into acount clipping results when calculating new input rect (scaled to input rect size) */
170 Rect.left = InputRect.left + (CombinedRect.left - OutputRect.left) * (InputRect.right - InputRect.left) / (OutputRect.right - OutputRect.left);
171 Rect.right = InputRect.right + (CombinedRect.right - OutputRect.right) * (InputRect.right - InputRect.left) / (OutputRect.right - OutputRect.left);
172 Rect.top = InputRect.top + (CombinedRect.top - OutputRect.top) * (InputRect.bottom - InputRect.top) / (OutputRect.bottom - OutputRect.top);
173 Rect.bottom = InputRect.bottom + (CombinedRect.bottom - OutputRect.bottom) * (InputRect.bottom - InputRect.top) / (OutputRect.bottom - OutputRect.top);
174
175 /* Alpha blend one rect */
177 OutputObj, InputObj, &CombinedRect, &Rect, ClipRegion, ColorTranslation, BlendObj) && Ret;
178 }
179 }
180 }
181 while (EnumMore);
182 break;
183
184 default:
186 ASSERT(FALSE);
187 break;
188 }
189
190 IntEngLeave(&EnterLeaveDest);
191 IntEngLeave(&EnterLeaveSource);
192
193 return Ret;
194}
195
196BOOL
199 _Inout_ SURFOBJ *psoDest,
200 _In_ SURFOBJ *psoSource,
206{
207 BOOL ret = FALSE;
208 SURFACE *psurfDest;
209
210 ASSERT(psoDest);
211 ASSERT(psoSource);
214 //ASSERT(pBlendObj);
215
216 /* If no clip object is given, use trivial one */
217 if (!pco) pco = (CLIPOBJ *)&gxcoTrivial;
218
219 /* Check if there is anything to draw */
220 if ((pco->rclBounds.left >= pco->rclBounds.right) ||
221 (pco->rclBounds.top >= pco->rclBounds.bottom))
222 {
223 /* Nothing to do */
224 return TRUE;
225 }
226
227 psurfDest = CONTAINING_RECORD(psoDest, SURFACE, SurfObj);
228
229 /* Call the driver's DrvAlphaBlend if available */
230 if (psurfDest->flags & HOOK_ALPHABLEND)
231 {
232 ret = GDIDEVFUNCS(psoDest).AlphaBlend(
233 psoDest, psoSource, pco, pxlo,
235 }
236
237 if (!ret)
238 {
239 ret = EngAlphaBlend(psoDest, psoSource, pco, pxlo,
241 }
242
243 return ret;
244}
245
246/*
247 * @implemented
248 */
249BOOL
252 IN SURFOBJ *psoSource,
253 IN CLIPOBJ *ClipRegion,
254 IN XLATEOBJ *ColorTranslation,
255 IN PRECTL upDestRect,
256 IN PRECTL upSourceRect,
257 IN BLENDOBJ *BlendObj)
258{
259 RECTL DestRect;
260 RECTL SourceRect;
261
263 {
264 ProbeForRead(upDestRect, sizeof(RECTL), 1);
265 RtlCopyMemory(&DestRect,upDestRect, sizeof(RECTL));
266
267 ProbeForRead(upSourceRect, sizeof(RECTL), 1);
268 RtlCopyMemory(&SourceRect, upSourceRect, sizeof(RECTL));
269
270 }
272 {
273 _SEH2_YIELD(return FALSE);
274 }
275 _SEH2_END;
276
277 return EngAlphaBlend(psoDest, psoSource, ClipRegion, ColorTranslation, &DestRect, &SourceRect, BlendObj);
278}
279
unsigned char BOOLEAN
#define DPRINT1
Definition: precomp.h:8
#define UNIMPLEMENTED
Definition: debug.h:118
#define NULL
Definition: types.h:112
#define TRUE
Definition: types.h:120
#define FALSE
Definition: types.h:117
#define APIENTRY
Definition: api.h:79
#define ERROR_INVALID_PARAMETER
Definition: compat.h:101
switch(r->id)
Definition: btrfs.c:3046
BOOL APIENTRY IntEngEnter(PINTENG_ENTER_LEAVE EnterLeave, SURFOBJ *psoDest, RECTL *DestRect, BOOL ReadOnly, POINTL *Translate, SURFOBJ **ppsoOutput)
Definition: engmisc.c:15
BOOL APIENTRY IntEngLeave(PINTENG_ENTER_LEAVE EnterLeave)
Definition: engmisc.c:162
VOID NTAPI ProbeForRead(IN CONST VOID *Address, IN SIZE_T Length, IN ULONG Alignment)
Definition: exintrin.c:102
#define _SEH2_END
Definition: filesup.c:22
#define _SEH2_TRY
Definition: filesup.c:19
unsigned int BOOL
Definition: ntddk_ex.h:94
GLsizei GLenum const GLvoid GLsizei GLenum GLbyte GLbyte GLbyte GLdouble GLdouble GLdouble GLfloat GLfloat GLfloat GLint GLint GLint GLshort GLshort GLshort GLubyte GLubyte GLubyte GLuint GLuint GLuint GLushort GLushort GLushort GLbyte GLbyte GLbyte GLbyte GLdouble GLdouble GLdouble GLdouble GLfloat GLfloat GLfloat GLfloat GLint GLint GLint GLint GLshort GLshort GLshort GLshort GLubyte GLubyte GLubyte GLubyte GLuint GLuint GLuint GLuint GLushort GLushort GLushort GLushort GLboolean const GLdouble const GLfloat const GLint const GLshort const GLbyte const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLdouble const GLfloat const GLfloat const GLint const GLint const GLshort const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort GLenum GLenum GLenum GLfloat GLenum GLint GLenum GLenum GLenum GLfloat GLenum GLenum GLint GLenum GLfloat GLenum GLint GLint GLushort GLenum GLenum GLfloat GLenum GLenum GLint GLfloat const GLubyte GLenum GLenum GLenum const GLfloat GLenum GLenum const GLint GLenum GLint GLint GLsizei GLsizei GLint GLenum GLenum const GLvoid GLenum GLenum const GLfloat GLenum GLenum const GLint GLenum GLenum const GLdouble GLenum GLenum const GLfloat GLenum GLenum const GLint GLsizei GLuint GLfloat GLuint GLbitfield GLfloat GLint GLuint GLboolean GLenum GLfloat GLenum GLbitfield GLenum GLfloat GLfloat GLint GLint const GLfloat GLenum GLfloat GLfloat GLint GLint GLfloat GLfloat GLint GLint const GLfloat GLint GLfloat GLfloat GLint GLfloat GLfloat GLint GLfloat GLfloat const GLdouble const GLfloat const GLdouble const GLfloat GLint i
Definition: glfuncs.h:248
#define EXCEPTION_EXECUTE_HANDLER
Definition: excpt.h:85
#define ASSERT(a)
Definition: mode.c:44
#define AC_SRC_ALPHA
Definition: alphablend.c:9
#define _Inout_
Definition: ms_sal.h:378
#define _In_
Definition: ms_sal.h:308
#define _In_opt_
Definition: ms_sal.h:309
long LONG
Definition: pedump.c:60
#define _SEH2_EXCEPT(...)
Definition: pseh2_64.h:66
#define _SEH2_YIELD(__stmt)
Definition: pseh2_64.h:168
#define DPRINT
Definition: sndvol32.h:73
PFN_DIB_AlphaBlend DIB_AlphaBlend
Definition: dib.h:54
long bottom
Definition: polytest.cpp:53
long right
Definition: polytest.cpp:53
long top
Definition: polytest.cpp:53
long left
Definition: polytest.cpp:53
LONG y
Definition: windef.h:330
LONG x
Definition: windef.h:329
FLONG flags
Definition: surface.h:10
ULONG iBitmapFormat
Definition: winddi.h:1215
#define RtlCopyMemory(Destination, Source, Length)
Definition: typedefs.h:263
#define IN
Definition: typedefs.h:39
#define CONTAINING_RECORD(address, type, field)
Definition: typedefs.h:260
uint32_t ULONG
Definition: typedefs.h:59
int ret
DIB_FUNCTIONS DibFunctionsForBitmapFormat[]
Definition: dib.c:20
BOOL APIENTRY EngAlphaBlend(_Inout_ SURFOBJ *psoDest, _In_ SURFOBJ *psoSource, _In_opt_ CLIPOBJ *ClipRegion, _In_opt_ XLATEOBJ *ColorTranslation, _In_ RECTL *DestRect, _In_ RECTL *SourceRect, _In_ BLENDOBJ *BlendObj)
Definition: alphablend.c:20
BOOL APIENTRY NtGdiEngAlphaBlend(IN SURFOBJ *psoDest, IN SURFOBJ *psoSource, IN CLIPOBJ *ClipRegion, IN XLATEOBJ *ColorTranslation, IN PRECTL upDestRect, IN PRECTL upSourceRect, IN BLENDOBJ *BlendObj)
Definition: alphablend.c:251
BOOL APIENTRY IntEngAlphaBlend(_Inout_ SURFOBJ *psoDest, _In_ SURFOBJ *psoSource, _In_opt_ CLIPOBJ *pco, _In_opt_ XLATEOBJ *pxlo, _In_ RECTL *prclDest, _In_ RECTL *prclSrc, _In_ BLENDOBJ *pBlendObj)
Definition: alphablend.c:198
XCLIPOBJ gxcoTrivial
Definition: bitblt.c:20
#define GDIDEVFUNCS(SurfObj)
Definition: surface.h:106
VOID FASTCALL RECTL_vMakeWellOrdered(_Inout_ RECTL *prcl)
Definition: rect.c:81
BOOL FASTCALL RECTL_bIntersectRect(_Out_ RECTL *prclDst, _In_ const RECTL *prcl1, _In_ const RECTL *prcl2)
Definition: rect.c:55
#define DC_TRIVIAL
Definition: winddi.h:259
#define CT_RECTANGLES
Definition: winddi.h:1317
ENGAPI BOOL APIENTRY CLIPOBJ_bEnum(_In_ CLIPOBJ *pco, _In_ ULONG cj, _Out_bytecap_(cj) ULONG *pul)
Definition: clip.c:319
#define DC_COMPLEX
Definition: winddi.h:261
_In_ SURFOBJ _In_ CLIPOBJ _In_opt_ XLATEOBJ _In_ RECTL _In_ RECTL * prclSrc
Definition: winddi.h:3418
_In_ SURFOBJ _In_ CLIPOBJ _In_opt_ XLATEOBJ * pxlo
Definition: winddi.h:3416
ENGAPI ULONG APIENTRY CLIPOBJ_cEnumStart(_Inout_ CLIPOBJ *pco, _In_ BOOL bAll, _In_ ULONG iType, _In_ ULONG iDirection, _In_ ULONG cLimit)
Definition: clip.c:255
#define DC_RECT
Definition: winddi.h:260
#define CD_ANY
Definition: winddi.h:1326
ENGAPI VOID APIENTRY EngSetLastError(_In_ ULONG iError)
Definition: error.c:22
#define HOOK_ALPHABLEND
Definition: winddi.h:1435
_In_ SURFOBJ _In_ CLIPOBJ _In_opt_ XLATEOBJ _In_ RECTL _In_ RECTL _In_ BLENDOBJ * pBlendObj
Definition: winddi.h:3419
_In_ SURFOBJ _In_ CLIPOBJ _In_opt_ XLATEOBJ _In_ RECTL * prclDest
Definition: winddi.h:3417
_In_ SURFOBJ _In_ CLIPOBJ * pco
Definition: winddi.h:3415
#define AC_SRC_OVER
Definition: wingdi.h:1369