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
|
/*
Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies)
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Library General Public License for more details.
You should have received a copy of the GNU Library General Public License
along with this library; see the file COPYING.LIB. If not, write to
the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
Boston, MA 02110-1301, USA.
*/
#include "config.h"
#include "GraphicsSurface.h"
#if USE(GRAPHICS_SURFACE) && OS(DARWIN)
#include <CFNumber.h>
#include <CGLContext.h>
#include <CGLCurrent.h>
#include <CGLIOSurface.h>
#include <IOSurface/IOSurface.h>
namespace WebCore {
uint32_t GraphicsSurface::platformExport()
{
return IOSurfaceGetID(m_platformSurface);
}
static uint32_t createTexture(IOSurfaceRef handle)
{
GLuint texture = 0;
GLuint format = GL_BGRA;
GLuint type = GL_UNSIGNED_INT_8_8_8_8_REV;
GLuint internalFormat = GL_RGBA;
CGLContextObj context = CGLGetCurrentContext();
if (!context)
return 0;
GLint prevTexture;
GLboolean wasEnabled = glIsEnabled(GL_TEXTURE_RECTANGLE_ARB);
glGetIntegerv(GL_TEXTURE_RECTANGLE_ARB, &prevTexture);
if (!wasEnabled)
glEnable(GL_TEXTURE_RECTANGLE_ARB);
glGenTextures(1, &texture);
glBindTexture(GL_TEXTURE_RECTANGLE_ARB, texture);
CGLError error = CGLTexImageIOSurface2D(context, GL_TEXTURE_RECTANGLE_ARB, internalFormat, IOSurfaceGetWidth(handle), IOSurfaceGetHeight(handle), format, type, handle, 0);
if (error) {
glDeleteTextures(1, &texture);
texture = 0;
}
glBindTexture(GL_TEXTURE_RECTANGLE_ARB, prevTexture);
if (!wasEnabled)
glDisable(GL_TEXTURE_RECTANGLE_ARB);
return texture;
}
uint32_t GraphicsSurface::platformGetTextureID()
{
if (!m_texture)
m_texture = createTexture(m_platformSurface);
return m_texture;
}
void GraphicsSurface::platformCopyToGLTexture(uint32_t target, uint32_t id, const IntRect& targetRect, const IntPoint& offset)
{
glPushAttrib(GL_ALL_ATTRIB_BITS);
if (!m_texture)
m_texture = createTexture(m_platformSurface);
if (!m_fbo)
glGenFramebuffers(1, &m_fbo);
glBindTexture(GL_TEXTURE_RECTANGLE_ARB, 0);
glEnable(GL_TEXTURE_RECTANGLE_ARB);
glEnable(target);
glBindTexture(target, id);
glBindFramebuffer(GL_READ_FRAMEBUFFER, m_fbo);
glFramebufferTexture2D(GL_READ_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_RECTANGLE_ARB, m_texture, 0);
glCopyTexSubImage2D(target, 0, targetRect.x(), targetRect.y(), offset.x(), offset.y(), targetRect.width(), targetRect.height());
glFramebufferTexture2D(GL_READ_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_RECTANGLE_ARB, 0, 0);
glBindFramebuffer(GL_READ_FRAMEBUFFER, 0);
glPopAttrib();
}
void GraphicsSurface::platformCopyFromFramebuffer(uint32_t originFbo, const IntRect& sourceRect)
{
glPushAttrib(GL_ALL_ATTRIB_BITS);
if (!m_texture)
m_texture = createTexture(m_platformSurface);
if (!m_fbo)
glGenFramebuffers(1, &m_fbo);
GLint oldFBO;
glGetIntegerv(GL_FRAMEBUFFER_BINDING, &oldFBO);
glEnable(GL_TEXTURE_RECTANGLE_ARB);
glBindFramebuffer(GL_READ_FRAMEBUFFER, originFbo);
glBindFramebuffer(GL_DRAW_FRAMEBUFFER, m_fbo);
glFramebufferTexture2D(GL_DRAW_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_RECTANGLE_ARB, m_texture, 0);
glBlitFramebuffer(0, 0, sourceRect.width(), sourceRect.height(), 0, sourceRect.height(), sourceRect.width(), 0, GL_COLOR_BUFFER_BIT, GL_LINEAR); // Flip the texture upside down.
glFramebufferTexture2D(GL_DRAW_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_RECTANGLE_ARB, 0, 0);
glBindFramebuffer(GL_FRAMEBUFFER, oldFBO);
glPopAttrib();
// Flushing the gl command buffer is necessary to ensure the texture has correctly been bound to the IOSurface.
glFlush();
}
bool GraphicsSurface::platformCreate(const IntSize& size, Flags flags)
{
unsigned pixelFormat = 'BGRA';
unsigned bytesPerElement = 4;
int width = size.width();
int height = size.height();
unsigned long bytesPerRow = IOSurfaceAlignProperty(kIOSurfaceBytesPerRow, width * bytesPerElement);
if (!bytesPerRow)
return false;
unsigned long allocSize = IOSurfaceAlignProperty(kIOSurfaceAllocSize, height * bytesPerRow);
if (!allocSize)
return false;
const void *keys[7];
const void *values[7];
keys[0] = kIOSurfaceWidth;
values[0] = CFNumberCreate(0, kCFNumberIntType, &width);
keys[1] = kIOSurfaceHeight;
values[1] = CFNumberCreate(0, kCFNumberIntType, &height);
keys[2] = kIOSurfacePixelFormat;
values[2] = CFNumberCreate(0, kCFNumberIntType, &pixelFormat);
keys[3] = kIOSurfaceBytesPerElement;
values[3] = CFNumberCreate(0, kCFNumberIntType, &bytesPerElement);
keys[4] = kIOSurfaceBytesPerRow;
values[4] = CFNumberCreate(0, kCFNumberLongType, &bytesPerRow);
keys[5] = kIOSurfaceAllocSize;
values[5] = CFNumberCreate(0, kCFNumberLongType, &allocSize);
keys[6] = kIOSurfaceIsGlobal;
values[6] = (flags & GraphicsSurface::SupportsSharing) ? kCFBooleanTrue : kCFBooleanFalse;
CFDictionaryRef dict = CFDictionaryCreate(0, keys, values, 7, &kCFTypeDictionaryKeyCallBacks, &kCFTypeDictionaryValueCallBacks);
for (unsigned i = 0; i < 7; i++)
CFRelease(values[i]);
m_platformSurface = IOSurfaceCreate(dict);
return !!m_platformSurface;
}
bool GraphicsSurface::platformImport(uint32_t token)
{
m_platformSurface = IOSurfaceLookup(token);
return !!m_platformSurface;
}
static int ioSurfaceLockOptions(int lockOptions)
{
int options = 0;
if (lockOptions & GraphicsSurface::ReadOnly)
options |= kIOSurfaceLockReadOnly;
if (!(lockOptions & GraphicsSurface::RetainPixels))
options |= kIOSurfaceLockAvoidSync;
return options;
}
static int ioSurfaceUnlockOptions(int lockOptions)
{
int options = 0;
if (lockOptions & GraphicsSurface::ReadOnly)
options |= (kIOSurfaceLockAvoidSync | kIOSurfaceLockReadOnly);
return options;
}
char* GraphicsSurface::platformLock(const IntRect& rect, int* outputStride, LockOptions lockOptions)
{
m_lockOptions = lockOptions;
IOSurfaceLock(m_platformSurface, ioSurfaceLockOptions(m_lockOptions), 0);
int stride = IOSurfaceGetBytesPerRow(m_platformSurface);
if (outputStride)
*outputStride = stride;
char* base = static_cast<char*>(IOSurfaceGetBaseAddress(m_platformSurface));
return base + stride * rect.y() + rect.x() * 4;
}
void GraphicsSurface::platformUnlock()
{
IOSurfaceUnlock(m_platformSurface, ioSurfaceUnlockOptions(m_lockOptions) & (~kIOSurfaceLockAvoidSync), 0);
}
void GraphicsSurface::platformDestroy()
{
if (m_fbo)
glDeleteFramebuffers(1, &m_fbo);
if (m_texture)
glDeleteTextures(1, &m_texture);
CFRelease(IOSurfaceRef(m_platformSurface));
}
}
#endif
|
