ReactOS  0.4.15-dev-4914-g2220e56
alphablend.c File Reference
#include <win32k.h>
#include <debug.h>
Include dependency graph for alphablend.c:

Go to the source code of this file.

Macros

#define NDEBUG
 

Functions

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)
 
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)
 
BOOL APIENTRY NtGdiEngAlphaBlend (IN SURFOBJ *psoDest, IN SURFOBJ *psoSource, IN CLIPOBJ *ClipRegion, IN XLATEOBJ *ColorTranslation, IN PRECTL upDestRect, IN PRECTL upSourceRect, IN BLENDOBJ *BlendObj)
 

Macro Definition Documentation

◆ NDEBUG

#define NDEBUG

Definition at line 11 of file alphablend.c.

Function Documentation

◆ EngAlphaBlend()

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 at line 20 of file alphablend.c.

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  ClipRect.left = ClipRegion->rclBounds.left + Translate.x;
135  ClipRect.right = ClipRegion->rclBounds.right + Translate.x;
136  ClipRect.top = ClipRegion->rclBounds.top + Translate.y;
137  ClipRect.bottom = ClipRegion->rclBounds.bottom + Translate.y;
138  if (RECTL_bIntersectRect(&CombinedRect, &OutputRect, &ClipRect))
139  {
140  /* take into acount clipping results when calculating new input rect (scaled to input rect size) */
141  Rect.left = InputRect.left + (CombinedRect.left - OutputRect.left) * (InputRect.right - InputRect.left) / (OutputRect.right - OutputRect.left);
142  Rect.right = InputRect.right + (CombinedRect.right - OutputRect.right) * (InputRect.right - InputRect.left) / (OutputRect.right - OutputRect.left);
143  Rect.top = InputRect.top + (CombinedRect.top - OutputRect.top) * (InputRect.bottom - InputRect.top) / (OutputRect.bottom - OutputRect.top);
144  Rect.bottom = InputRect.bottom + (CombinedRect.bottom - OutputRect.bottom) * (InputRect.bottom - InputRect.top) / (OutputRect.bottom - OutputRect.top);
145 
146  /* Aplha blend one rect */
148  OutputObj, InputObj, &CombinedRect, &Rect, ClipRegion, ColorTranslation, BlendObj);
149  }
150  break;
151 
152  case DC_COMPLEX:
153  Ret = TRUE;
154  CLIPOBJ_cEnumStart(ClipRegion, FALSE, CT_RECTANGLES, CD_ANY, 0);
155  do
156  {
157  EnumMore = CLIPOBJ_bEnum(ClipRegion,(ULONG) sizeof(RectEnum),
158  (PVOID) &RectEnum);
159 
160  for (i = 0; i < RectEnum.c; i++)
161  {
162  ClipRect.left = RectEnum.arcl[i].left + Translate.x;
163  ClipRect.right = RectEnum.arcl[i].right + Translate.x;
164  ClipRect.top = RectEnum.arcl[i].top + Translate.y;
165  ClipRect.bottom = RectEnum.arcl[i].bottom + Translate.y;
166  if (RECTL_bIntersectRect(&CombinedRect, &OutputRect, &ClipRect))
167  {
168  /* take into acount clipping results when calculating new input rect (scaled to input rect size) */
169  Rect.left = InputRect.left + (CombinedRect.left - OutputRect.left) * (InputRect.right - InputRect.left) / (OutputRect.right - OutputRect.left);
170  Rect.right = InputRect.right + (CombinedRect.right - OutputRect.right) * (InputRect.right - InputRect.left) / (OutputRect.right - OutputRect.left);
171  Rect.top = InputRect.top + (CombinedRect.top - OutputRect.top) * (InputRect.bottom - InputRect.top) / (OutputRect.bottom - OutputRect.top);
172  Rect.bottom = InputRect.bottom + (CombinedRect.bottom - OutputRect.bottom) * (InputRect.bottom - InputRect.top) / (OutputRect.bottom - OutputRect.top);
173 
174  /* Alpha blend one rect */
176  OutputObj, InputObj, &CombinedRect, &Rect, ClipRegion, ColorTranslation, BlendObj) && Ret;
177  }
178  }
179  }
180  while (EnumMore);
181  break;
182 
183  default:
185  ASSERT(FALSE);
186  break;
187  }
188 
189  IntEngLeave(&EnterLeaveDest);
190  IntEngLeave(&EnterLeaveSource);
191 
192  return Ret;
193 }
#define ERROR_INVALID_PARAMETER
Definition: compat.h:101
#define TRUE
Definition: types.h:120
#define DC_TRIVIAL
Definition: winddi.h:259
long bottom
Definition: polytest.cpp:53
ULONG iBitmapFormat
Definition: winddi.h:1215
#define AC_SRC_ALPHA
Definition: alphablend.c:9
ULONG c
Definition: vgaddi.h:78
LONG y
Definition: windef.h:330
PFN_DIB_AlphaBlend DIB_AlphaBlend
Definition: dib.h:54
long right
Definition: polytest.cpp:53
#define FALSE
Definition: types.h:117
unsigned int BOOL
Definition: ntddk_ex.h:94
long LONG
Definition: pedump.c:60
long top
Definition: polytest.cpp:53
unsigned char BOOLEAN
#define CT_RECTANGLES
Definition: winddi.h:1317
switch(r->id)
Definition: btrfs.c:3015
long left
Definition: polytest.cpp:53
#define DC_RECT
Definition: winddi.h:260
#define ASSERT(a)
Definition: mode.c:44
ENGAPI ULONG APIENTRY CLIPOBJ_cEnumStart(_Inout_ CLIPOBJ *pco, _In_ BOOL bAll, _In_ ULONG iType, _In_ ULONG iDirection, _In_ ULONG cLimit)
Definition: clip.c:255
BOOL FASTCALL RECTL_bIntersectRect(_Out_ RECTL *prclDst, _In_ const RECTL *prcl1, _In_ const RECTL *prcl2)
Definition: rect.c:55
LONG x
Definition: windef.h:329
BOOL APIENTRY IntEngEnter(PINTENG_ENTER_LEAVE EnterLeave, SURFOBJ *psoDest, RECTL *DestRect, BOOL ReadOnly, POINTL *Translate, SURFOBJ **ppsoOutput)
Definition: engmisc.c:15
#define AC_SRC_OVER
Definition: wingdi.h:1369
RECTL arcl[ENUM_RECT_LIMIT]
Definition: vgaddi.h:79
#define DC_COMPLEX
Definition: winddi.h:261
DIB_FUNCTIONS DibFunctionsForBitmapFormat[]
Definition: dib.c:20
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 NULL
Definition: types.h:112
#define DPRINT1
Definition: precomp.h:8
unsigned int ULONG
Definition: retypes.h:1
#define UNIMPLEMENTED
Definition: debug.h:115
BOOL APIENTRY IntEngLeave(PINTENG_ENTER_LEAVE EnterLeave)
Definition: engmisc.c:162
#define DPRINT
Definition: sndvol32.h:71
VOID FASTCALL RECTL_vMakeWellOrdered(_Inout_ RECTL *prcl)
Definition: rect.c:81
ENGAPI BOOL APIENTRY CLIPOBJ_bEnum(_In_ CLIPOBJ *pco, _In_ ULONG cj, _Out_bytecap_(cj) ULONG *pul)
Definition: clip.c:319
ENGAPI VOID APIENTRY EngSetLastError(_In_ ULONG iError)
Definition: error.c:28
struct Rect Rect
#define CD_ANY
Definition: winddi.h:1326

Referenced by IntEngAlphaBlend(), NtGdiEngAlphaBlend(), and PanAlphaBlend().

◆ IntEngAlphaBlend()

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 at line 197 of file alphablend.c.

205 {
206  BOOL ret = FALSE;
207  SURFACE *psurfDest;
208 
209  ASSERT(psoDest);
210  ASSERT(psoSource);
211  ASSERT(prclDest);
212  ASSERT(prclSrc);
213  //ASSERT(pBlendObj);
214 
215  /* If no clip object is given, use trivial one */
216  if (!pco) pco = (CLIPOBJ *)&gxcoTrivial;
217 
218  /* Check if there is anything to draw */
219  if ((pco->rclBounds.left >= pco->rclBounds.right) ||
220  (pco->rclBounds.top >= pco->rclBounds.bottom))
221  {
222  /* Nothing to do */
223  return TRUE;
224  }
225 
226  psurfDest = CONTAINING_RECORD(psoDest, SURFACE, SurfObj);
227 
228  /* Call the driver's DrvAlphaBlend if available */
229  if (psurfDest->flags & HOOK_ALPHABLEND)
230  {
231  ret = GDIDEVFUNCS(psoDest).AlphaBlend(
232  psoDest, psoSource, pco, pxlo,
234  }
235 
236  if (!ret)
237  {
238  ret = EngAlphaBlend(psoDest, psoSource, pco, pxlo,
240  }
241 
242  return ret;
243 }
XCLIPOBJ gxcoTrivial
Definition: bitblt.c:20
#define TRUE
Definition: types.h:120
#define HOOK_ALPHABLEND
Definition: winddi.h:1435
#define FALSE
Definition: types.h:117
unsigned int BOOL
Definition: ntddk_ex.h:94
PFLT_MESSAGE_WAITER_QUEUE CONTAINING_RECORD(Csq, DEVICE_EXTENSION, IrpQueue)) -> WaiterQ.mLock) _IRQL_raises_(DISPATCH_LEVEL) VOID NTAPI FltpAcquireMessageWaiterLock(_In_ PIO_CSQ Csq, _Out_ PKIRQL Irql)
Definition: Messaging.c:560
_In_ SURFOBJ _In_ CLIPOBJ _In_opt_ XLATEOBJ _In_ RECTL _In_ RECTL * prclSrc
Definition: winddi.h:3414
#define ASSERT(a)
Definition: mode.c:44
#define GDIDEVFUNCS(SurfObj)
Definition: surface.h:106
_In_ SURFOBJ _In_ CLIPOBJ _In_opt_ XLATEOBJ _In_ RECTL * prclDest
Definition: winddi.h:3414
int ret
_In_ SURFOBJ _In_ CLIPOBJ * pco
Definition: winddi.h:3414
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
_In_ SURFOBJ _In_ CLIPOBJ _In_opt_ XLATEOBJ _In_ RECTL _In_ RECTL _In_ BLENDOBJ * pBlendObj
Definition: winddi.h:3414
FLONG flags
Definition: surface.h:10
_In_ SURFOBJ _In_ CLIPOBJ _In_opt_ XLATEOBJ * pxlo
Definition: winddi.h:3414

Referenced by IntShowMousePointer(), NtGdiAlphaBlend(), and UserDrawIconEx().

◆ NtGdiEngAlphaBlend()

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 at line 250 of file alphablend.c.

257 {
258  RECTL DestRect;
259  RECTL SourceRect;
260 
261  _SEH2_TRY
262  {
263  ProbeForRead(upDestRect, sizeof(RECTL), 1);
264  RtlCopyMemory(&DestRect,upDestRect, sizeof(RECTL));
265 
266  ProbeForRead(upSourceRect, sizeof(RECTL), 1);
267  RtlCopyMemory(&SourceRect, upSourceRect, sizeof(RECTL));
268 
269  }
271  {
272  _SEH2_YIELD(return FALSE);
273  }
274  _SEH2_END;
275 
276  return EngAlphaBlend(psoDest, psoSource, ClipRegion, ColorTranslation, &DestRect, &SourceRect, BlendObj);
277 }
_SEH2_TRY
Definition: create.c:4226
#define FALSE
Definition: types.h:117
#define EXCEPTION_EXECUTE_HANDLER
Definition: excpt.h:85
VOID NTAPI ProbeForRead(IN CONST VOID *Address, IN SIZE_T Length, IN ULONG Alignment)
Definition: exintrin.c:102
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
_SEH2_END
Definition: create.c:4400
#define RtlCopyMemory(Destination, Source, Length)
Definition: typedefs.h:263
#define _SEH2_EXCEPT(...)
Definition: pseh2_64.h:40
#define _SEH2_YIELD(__stmt)
Definition: pseh2_64.h:168