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gfx/skia/trunk/src/gpu/gl/GrGLBufferImpl.cpp@129ffea94266 (annotated)

gfx/skia/trunk/src/gpu/gl/GrGLBufferImpl.cpp

Sat, 03 Jan 2015 20:18:00 +0100

author
Michael Schloh von Bennewitz <michael@schloh.com>
date
Sat, 03 Jan 2015 20:18:00 +0100
branch
TOR_BUG_3246
changeset 7
129ffea94266
permissions
-rw-r--r--

Conditionally enable double key logic according to:
private browsing mode or privacy.thirdparty.isolate preference and
implement in GetCookieStringCommon and FindCookie where it counts...
With some reservations of how to convince FindCookie users to test
condition and pass a nullptr when disabling double key logic.

michael@0 1 /*
michael@0 2 * Copyright 2013 Google Inc.
michael@0 3 *
michael@0 4 * Use of this source code is governed by a BSD-style license that can be
michael@0 5 * found in the LICENSE file.
michael@0 6 */
michael@0 7
michael@0 8 #include "GrGLBufferImpl.h"
michael@0 9 #include "GrGpuGL.h"
michael@0 10
michael@0 11 #define GL_CALL(GPU, X) GR_GL_CALL(GPU->glInterface(), X)
michael@0 12
michael@0 13 #ifdef SK_DEBUG
michael@0 14 #define VALIDATE() this->validate()
michael@0 15 #else
michael@0 16 #define VALIDATE() do {} while(false)
michael@0 17 #endif
michael@0 18
michael@0 19 // GL_STREAM_DRAW triggers an optimization in Chromium's GPU process where a client's vertex buffer
michael@0 20 // objects are implemented as client-side-arrays on tile-deferred architectures.
michael@0 21 #define DYNAMIC_USAGE_PARAM GR_GL_STREAM_DRAW
michael@0 22
michael@0 23 GrGLBufferImpl::GrGLBufferImpl(GrGpuGL* gpu, const Desc& desc, GrGLenum bufferType)
michael@0 24 : fDesc(desc)
michael@0 25 , fBufferType(bufferType)
michael@0 26 , fLockPtr(NULL) {
michael@0 27 if (0 == desc.fID) {
michael@0 28 fCPUData = sk_malloc_flags(desc.fSizeInBytes, SK_MALLOC_THROW);
michael@0 29 } else {
michael@0 30 fCPUData = NULL;
michael@0 31 }
michael@0 32 VALIDATE();
michael@0 33 }
michael@0 34
michael@0 35 void GrGLBufferImpl::release(GrGpuGL* gpu) {
michael@0 36 // make sure we've not been abandoned or already released
michael@0 37 if (NULL != fCPUData) {
michael@0 38 VALIDATE();
michael@0 39 sk_free(fCPUData);
michael@0 40 fCPUData = NULL;
michael@0 41 } else if (fDesc.fID && !fDesc.fIsWrapped) {
michael@0 42 VALIDATE();
michael@0 43 GL_CALL(gpu, DeleteBuffers(1, &fDesc.fID));
michael@0 44 if (GR_GL_ARRAY_BUFFER == fBufferType) {
michael@0 45 gpu->notifyVertexBufferDelete(fDesc.fID);
michael@0 46 } else {
michael@0 47 SkASSERT(GR_GL_ELEMENT_ARRAY_BUFFER == fBufferType);
michael@0 48 gpu->notifyIndexBufferDelete(fDesc.fID);
michael@0 49 }
michael@0 50 fDesc.fID = 0;
michael@0 51 }
michael@0 52 fLockPtr = NULL;
michael@0 53 }
michael@0 54
michael@0 55 void GrGLBufferImpl::abandon() {
michael@0 56 fDesc.fID = 0;
michael@0 57 fLockPtr = NULL;
michael@0 58 sk_free(fCPUData);
michael@0 59 fCPUData = NULL;
michael@0 60 }
michael@0 61
michael@0 62 void GrGLBufferImpl::bind(GrGpuGL* gpu) const {
michael@0 63 VALIDATE();
michael@0 64 if (GR_GL_ARRAY_BUFFER == fBufferType) {
michael@0 65 gpu->bindVertexBuffer(fDesc.fID);
michael@0 66 } else {
michael@0 67 SkASSERT(GR_GL_ELEMENT_ARRAY_BUFFER == fBufferType);
michael@0 68 gpu->bindIndexBufferAndDefaultVertexArray(fDesc.fID);
michael@0 69 }
michael@0 70 }
michael@0 71
michael@0 72 void* GrGLBufferImpl::lock(GrGpuGL* gpu) {
michael@0 73 VALIDATE();
michael@0 74 SkASSERT(!this->isLocked());
michael@0 75 if (0 == fDesc.fID) {
michael@0 76 fLockPtr = fCPUData;
michael@0 77 } else if (gpu->caps()->bufferLockSupport()) {
michael@0 78 this->bind(gpu);
michael@0 79 // Let driver know it can discard the old data
michael@0 80 GL_CALL(gpu, BufferData(fBufferType,
michael@0 81 (GrGLsizeiptr) fDesc.fSizeInBytes,
michael@0 82 NULL,
michael@0 83 fDesc.fDynamic ? DYNAMIC_USAGE_PARAM : GR_GL_STATIC_DRAW));
michael@0 84 GR_GL_CALL_RET(gpu->glInterface(),
michael@0 85 fLockPtr,
michael@0 86 MapBuffer(fBufferType, GR_GL_WRITE_ONLY));
michael@0 87 }
michael@0 88 return fLockPtr;
michael@0 89 }
michael@0 90
michael@0 91 void GrGLBufferImpl::unlock(GrGpuGL* gpu) {
michael@0 92 VALIDATE();
michael@0 93 SkASSERT(this->isLocked());
michael@0 94 if (0 != fDesc.fID) {
michael@0 95 SkASSERT(gpu->caps()->bufferLockSupport());
michael@0 96 this->bind(gpu);
michael@0 97 GL_CALL(gpu, UnmapBuffer(fBufferType));
michael@0 98 }
michael@0 99 fLockPtr = NULL;
michael@0 100 }
michael@0 101
michael@0 102 bool GrGLBufferImpl::isLocked() const {
michael@0 103 VALIDATE();
michael@0 104 return NULL != fLockPtr;
michael@0 105 }
michael@0 106
michael@0 107 bool GrGLBufferImpl::updateData(GrGpuGL* gpu, const void* src, size_t srcSizeInBytes) {
michael@0 108 SkASSERT(!this->isLocked());
michael@0 109 VALIDATE();
michael@0 110 if (srcSizeInBytes > fDesc.fSizeInBytes) {
michael@0 111 return false;
michael@0 112 }
michael@0 113 if (0 == fDesc.fID) {
michael@0 114 memcpy(fCPUData, src, srcSizeInBytes);
michael@0 115 return true;
michael@0 116 }
michael@0 117 this->bind(gpu);
michael@0 118 GrGLenum usage = fDesc.fDynamic ? DYNAMIC_USAGE_PARAM : GR_GL_STATIC_DRAW;
michael@0 119
michael@0 120 #if GR_GL_USE_BUFFER_DATA_NULL_HINT
michael@0 121 if (fDesc.fSizeInBytes == srcSizeInBytes) {
michael@0 122 GL_CALL(gpu, BufferData(fBufferType, (GrGLsizeiptr) srcSizeInBytes, src, usage));
michael@0 123 } else {
michael@0 124 // Before we call glBufferSubData we give the driver a hint using
michael@0 125 // glBufferData with NULL. This makes the old buffer contents
michael@0 126 // inaccessible to future draws. The GPU may still be processing
michael@0 127 // draws that reference the old contents. With this hint it can
michael@0 128 // assign a different allocation for the new contents to avoid
michael@0 129 // flushing the gpu past draws consuming the old contents.
michael@0 130 GL_CALL(gpu, BufferData(fBufferType, (GrGLsizeiptr) fDesc.fSizeInBytes, NULL, usage));
michael@0 131 GL_CALL(gpu, BufferSubData(fBufferType, 0, (GrGLsizeiptr) srcSizeInBytes, src));
michael@0 132 }
michael@0 133 #else
michael@0 134 // Note that we're cheating on the size here. Currently no methods
michael@0 135 // allow a partial update that preserves contents of non-updated
michael@0 136 // portions of the buffer (lock() does a glBufferData(..size, NULL..))
michael@0 137 bool doSubData = false;
michael@0 138 #if GR_GL_MAC_BUFFER_OBJECT_PERFOMANCE_WORKAROUND
michael@0 139 static int N = 0;
michael@0 140 // 128 was chosen experimentally. At 256 a slight hitchiness was noticed
michael@0 141 // when dragging a Chromium window around with a canvas tab backgrounded.
michael@0 142 doSubData = 0 == (N % 128);
michael@0 143 ++N;
michael@0 144 #endif
michael@0 145 if (doSubData) {
michael@0 146 // The workaround is to do a glBufferData followed by glBufferSubData.
michael@0 147 // Chromium's command buffer may turn a glBufferSubData where the size
michael@0 148 // exactly matches the buffer size into a glBufferData. So we tack 1
michael@0 149 // extra byte onto the glBufferData.
michael@0 150 GL_CALL(gpu, BufferData(fBufferType, srcSizeInBytes + 1, NULL, usage));
michael@0 151 GL_CALL(gpu, BufferSubData(fBufferType, 0, srcSizeInBytes, src));
michael@0 152 } else {
michael@0 153 GL_CALL(gpu, BufferData(fBufferType, srcSizeInBytes, src, usage));
michael@0 154 }
michael@0 155 #endif
michael@0 156 return true;
michael@0 157 }
michael@0 158
michael@0 159 void GrGLBufferImpl::validate() const {
michael@0 160 SkASSERT(GR_GL_ARRAY_BUFFER == fBufferType || GR_GL_ELEMENT_ARRAY_BUFFER == fBufferType);
michael@0 161 // The following assert isn't valid when the buffer has been abandoned:
michael@0 162 // SkASSERT((0 == fDesc.fID) == (NULL != fCPUData));
michael@0 163 SkASSERT(0 != fDesc.fID || !fDesc.fIsWrapped);
michael@0 164 SkASSERT(NULL == fCPUData || NULL == fLockPtr || fCPUData == fLockPtr);
michael@0 165 }

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