1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
|
/*
* Copyright 2011 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#ifndef GrTexture_DEFINED
#define GrTexture_DEFINED
#include "GrSurface.h"
#include "SkPoint.h"
#include "GrRenderTarget.h"
class GrResourceKey;
class GrTextureParams;
class GrTexture : public GrSurface {
public:
SK_DECLARE_INST_COUNT(GrTexture)
// from GrResource
/**
* Informational texture flags
*/
enum FlagBits {
kFirstBit = (kLastPublic_GrTextureFlagBit << 1),
/**
* This texture should be returned to the texture cache when
* it is no longer reffed
*/
kReturnToCache_FlagBit = kFirstBit,
};
void setFlag(GrTextureFlags flags) {
fDesc.fFlags = fDesc.fFlags | flags;
}
void resetFlag(GrTextureFlags flags) {
fDesc.fFlags = fDesc.fFlags & ~flags;
}
bool isSetFlag(GrTextureFlags flags) const {
return 0 != (fDesc.fFlags & flags);
}
void dirtyMipMaps(bool mipMapsDirty) {
fMipMapsDirty = mipMapsDirty;
}
bool mipMapsAreDirty() const {
return fMipMapsDirty;
}
/**
* Approximate number of bytes used by the texture
*/
virtual size_t sizeInBytes() const SK_OVERRIDE {
return (size_t) fDesc.fWidth *
fDesc.fHeight *
GrBytesPerPixel(fDesc.fConfig);
}
// GrSurface overrides
virtual bool readPixels(int left, int top, int width, int height,
GrPixelConfig config,
void* buffer,
size_t rowBytes = 0,
uint32_t pixelOpsFlags = 0) SK_OVERRIDE;
virtual void writePixels(int left, int top, int width, int height,
GrPixelConfig config,
const void* buffer,
size_t rowBytes = 0,
uint32_t pixelOpsFlags = 0) SK_OVERRIDE;
/**
* @return this texture
*/
virtual GrTexture* asTexture() SK_OVERRIDE { return this; }
virtual const GrTexture* asTexture() const SK_OVERRIDE { return this; }
/**
* Retrieves the render target underlying this texture that can be passed to
* GrGpu::setRenderTarget().
*
* @return handle to render target or NULL if the texture is not a
* render target
*/
virtual GrRenderTarget* asRenderTarget() SK_OVERRIDE {
return fRenderTarget.get();
}
virtual const GrRenderTarget* asRenderTarget() const SK_OVERRIDE {
return fRenderTarget.get();
}
// GrTexture
/**
* Convert from texels to normalized texture coords for POT textures
* only.
*/
GrFixed normalizeFixedX(GrFixed x) const {
SkASSERT(GrIsPow2(fDesc.fWidth));
return x >> fShiftFixedX;
}
GrFixed normalizeFixedY(GrFixed y) const {
SkASSERT(GrIsPow2(fDesc.fHeight));
return y >> fShiftFixedY;
}
/**
* Return the native ID or handle to the texture, depending on the
* platform. e.g. on OpenGL, return the texture ID.
*/
virtual GrBackendObject getTextureHandle() const = 0;
/**
* Call this when the state of the native API texture object is
* altered directly, without being tracked by skia.
*/
virtual void invalidateCachedState() = 0;
#ifdef SK_DEBUG
void validate() const {
this->INHERITED::validate();
this->validateDesc();
}
#endif
static GrResourceKey ComputeKey(const GrGpu* gpu,
const GrTextureParams* params,
const GrTextureDesc& desc,
const GrCacheID& cacheID);
static GrResourceKey ComputeScratchKey(const GrTextureDesc& desc);
static bool NeedsResizing(const GrResourceKey& key);
static bool NeedsBilerp(const GrResourceKey& key);
protected:
// A texture refs its rt representation but not vice-versa. It is up to
// the subclass constructor to initialize this pointer.
SkAutoTUnref<GrRenderTarget> fRenderTarget;
GrTexture(GrGpu* gpu, bool isWrapped, const GrTextureDesc& desc)
: INHERITED(gpu, isWrapped, desc)
, fRenderTarget(NULL)
, fMipMapsDirty(true) {
// only make sense if alloc size is pow2
fShiftFixedX = 31 - SkCLZ(fDesc.fWidth);
fShiftFixedY = 31 - SkCLZ(fDesc.fHeight);
}
virtual ~GrTexture();
// GrResource overrides
virtual void onRelease() SK_OVERRIDE;
virtual void onAbandon() SK_OVERRIDE;
void validateDesc() const;
private:
// these two shift a fixed-point value into normalized coordinates
// for this texture if the texture is power of two sized.
int fShiftFixedX;
int fShiftFixedY;
bool fMipMapsDirty;
virtual void internal_dispose() const SK_OVERRIDE;
typedef GrSurface INHERITED;
};
/**
* Represents a texture that is intended to be accessed in device coords with an offset.
*/
class GrDeviceCoordTexture {
public:
GrDeviceCoordTexture() { fOffset.set(0, 0); }
GrDeviceCoordTexture(const GrDeviceCoordTexture& other) {
*this = other;
}
GrDeviceCoordTexture(GrTexture* texture, const SkIPoint& offset)
: fTexture(SkSafeRef(texture))
, fOffset(offset) {
}
GrDeviceCoordTexture& operator=(const GrDeviceCoordTexture& other) {
fTexture.reset(SkSafeRef(other.fTexture.get()));
fOffset = other.fOffset;
return *this;
}
const SkIPoint& offset() const { return fOffset; }
void setOffset(const SkIPoint& offset) { fOffset = offset; }
void setOffset(int ox, int oy) { fOffset.set(ox, oy); }
GrTexture* texture() const { return fTexture.get(); }
GrTexture* setTexture(GrTexture* texture) {
fTexture.reset(SkSafeRef(texture));
return texture;
}
private:
SkAutoTUnref<GrTexture> fTexture;
SkIPoint fOffset;
};
#endif
|
