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
|
/*
* Copyright 2011 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "GrTexture.h"
#include "GrContext.h"
#include "GrGpu.h"
#include "GrRenderTarget.h"
#include "GrResourceCache.h"
SK_DEFINE_INST_COUNT(GrTexture)
/**
* This method allows us to interrupt the normal deletion process and place
* textures back in the texture cache when their ref count goes to zero.
*/
void GrTexture::internal_dispose() const {
if (this->isSetFlag((GrTextureFlags) kReturnToCache_FlagBit) &&
NULL != this->INHERITED::getContext()) {
GrTexture* nonConstThis = const_cast<GrTexture *>(this);
this->fRefCnt = 1; // restore ref count to initial setting
nonConstThis->resetFlag((GrTextureFlags) kReturnToCache_FlagBit);
nonConstThis->INHERITED::getContext()->addExistingTextureToCache(nonConstThis);
// Note: "this" texture might be freed inside addExistingTextureToCache
// if it is purged.
return;
}
this->INHERITED::internal_dispose();
}
bool GrTexture::readPixels(int left, int top, int width, int height,
GrPixelConfig config, void* buffer,
size_t rowBytes, uint32_t pixelOpsFlags) {
// go through context so that all necessary flushing occurs
GrContext* context = this->getContext();
if (NULL == context) {
return false;
}
return context->readTexturePixels(this,
left, top, width, height,
config, buffer, rowBytes,
pixelOpsFlags);
}
void GrTexture::writePixels(int left, int top, int width, int height,
GrPixelConfig config, const void* buffer,
size_t rowBytes, uint32_t pixelOpsFlags) {
// go through context so that all necessary flushing occurs
GrContext* context = this->getContext();
if (NULL == context) {
return;
}
context->writeTexturePixels(this,
left, top, width, height,
config, buffer, rowBytes,
pixelOpsFlags);
}
void GrTexture::releaseRenderTarget() {
if (NULL != fRenderTarget) {
GrAssert(fRenderTarget->asTexture() == this);
GrAssert(fDesc.fFlags & kRenderTarget_GrTextureFlagBit);
fRenderTarget->onTextureReleaseRenderTarget();
fRenderTarget->unref();
fRenderTarget = NULL;
fDesc.fFlags = fDesc.fFlags &
~(kRenderTarget_GrTextureFlagBit|kNoStencil_GrTextureFlagBit);
fDesc.fSampleCnt = 0;
}
}
void GrTexture::onRelease() {
GrAssert(!this->isSetFlag((GrTextureFlags) kReturnToCache_FlagBit));
this->releaseRenderTarget();
INHERITED::onRelease();
}
void GrTexture::onAbandon() {
if (NULL != fRenderTarget) {
fRenderTarget->abandon();
}
INHERITED::onAbandon();
}
void GrTexture::validateDesc() const {
if (NULL != this->asRenderTarget()) {
// This texture has a render target
GrAssert(0 != (fDesc.fFlags & kRenderTarget_GrTextureFlagBit));
if (NULL != this->asRenderTarget()->getStencilBuffer()) {
GrAssert(0 != (fDesc.fFlags & kNoStencil_GrTextureFlagBit));
} else {
GrAssert(0 == (fDesc.fFlags & kNoStencil_GrTextureFlagBit));
}
GrAssert(fDesc.fSampleCnt == this->asRenderTarget()->numSamples());
} else {
GrAssert(0 == (fDesc.fFlags & kRenderTarget_GrTextureFlagBit));
GrAssert(0 == (fDesc.fFlags & kNoStencil_GrTextureFlagBit));
GrAssert(0 == fDesc.fSampleCnt);
}
}
// These flags need to fit in a GrResourceKey::ResourceFlags so they can be folded into the texture
// key
enum TextureFlags {
/**
* The kStretchToPOT bit is set when the texture is NPOT and is being repeated but the
* hardware doesn't support that feature.
*/
kStretchToPOT_TextureFlag = 0x1,
/**
* The kFilter bit can only be set when the kStretchToPOT flag is set and indicates whether the
* stretched texture should be bilerp filtered or point sampled.
*/
kFilter_TextureFlag = 0x2,
};
namespace {
GrResourceKey::ResourceFlags get_texture_flags(const GrGpu* gpu,
const GrTextureParams* params,
const GrTextureDesc& desc) {
GrResourceKey::ResourceFlags flags = 0;
bool tiled = NULL != params && params->isTiled();
if (tiled && !gpu->getCaps().npotTextureTileSupport()) {
if (!GrIsPow2(desc.fWidth) || !GrIsPow2(desc.fHeight)) {
flags |= kStretchToPOT_TextureFlag;
if (params->isBilerp()) {
flags |= kFilter_TextureFlag;
}
}
}
return flags;
}
GrResourceKey::ResourceType texture_resource_type() {
static const GrResourceKey::ResourceType gType = GrResourceKey::GenerateResourceType();
return gType;
}
// FIXME: This should be refactored with the code in gl/GrGpuGL.cpp.
GrSurfaceOrigin resolve_origin(const GrTextureDesc& desc) {
// By default, GrRenderTargets are GL's normal orientation so that they
// can be drawn to by the outside world without the client having
// to render upside down.
bool renderTarget = 0 != (desc.fFlags & kRenderTarget_GrTextureFlagBit);
if (kDefault_GrSurfaceOrigin == desc.fOrigin) {
return renderTarget ? kBottomLeft_GrSurfaceOrigin : kTopLeft_GrSurfaceOrigin;
} else {
return desc.fOrigin;
}
}
}
GrResourceKey GrTexture::ComputeKey(const GrGpu* gpu,
const GrTextureParams* params,
const GrTextureDesc& desc,
const GrCacheID& cacheID) {
GrResourceKey::ResourceFlags flags = get_texture_flags(gpu, params, desc);
return GrResourceKey(cacheID, texture_resource_type(), flags);
}
GrResourceKey GrTexture::ComputeScratchKey(const GrTextureDesc& desc) {
GrCacheID::Key idKey;
// Instead of a client-provided key of the texture contents we create a key from the
// descriptor.
GR_STATIC_ASSERT(sizeof(idKey) >= 16);
GrAssert(desc.fHeight < (1 << 16));
GrAssert(desc.fWidth < (1 << 16));
idKey.fData32[0] = (desc.fWidth) | (desc.fHeight << 16);
idKey.fData32[1] = desc.fConfig | desc.fSampleCnt << 16;
idKey.fData32[2] = desc.fFlags;
idKey.fData32[3] = resolve_origin(desc); // Only needs 2 bits actually
static const int kPadSize = sizeof(idKey) - 16;
GR_STATIC_ASSERT(kPadSize >= 0);
memset(idKey.fData8 + 16, 0, kPadSize);
GrCacheID cacheID(GrResourceKey::ScratchDomain(), idKey);
return GrResourceKey(cacheID, texture_resource_type(), 0);
}
bool GrTexture::NeedsResizing(const GrResourceKey& key) {
return SkToBool(key.getResourceFlags() & kStretchToPOT_TextureFlag);
}
bool GrTexture::NeedsFiltering(const GrResourceKey& key) {
return SkToBool(key.getResourceFlags() & kFilter_TextureFlag);
}
|
