1 /*
2 * Copyright (C) 2011 Andrew Wason (rectalogic@rectalogic.com)
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR
17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26 #include "config.h"
27
28 #if ENABLE(ACCELERATED_2D_CANVAS) || ENABLE(WEBGL)
29
30 #include "DrawingBuffer.h"
31
32 namespace WebCore {
33
DrawingBuffer(GraphicsContext3D * context,const IntSize & size,bool multisampleExtensionSupported,bool packedDepthStencilExtensionSupported)34 DrawingBuffer::DrawingBuffer(GraphicsContext3D* context,
35 const IntSize& size,
36 bool multisampleExtensionSupported,
37 bool packedDepthStencilExtensionSupported)
38 : m_context(context)
39 , m_size(-1, -1)
40 , m_multisampleExtensionSupported(multisampleExtensionSupported)
41 , m_packedDepthStencilExtensionSupported(packedDepthStencilExtensionSupported)
42 , m_fbo(context->createFramebuffer())
43 , m_colorBuffer(0)
44 , m_depthStencilBuffer(0)
45 , m_depthBuffer(0)
46 , m_stencilBuffer(0)
47 , m_multisampleFBO(0)
48 , m_multisampleColorBuffer(0)
49 {
50 ASSERT(m_fbo);
51 if (!m_fbo) {
52 clear();
53 return;
54 }
55
56 // create a texture to render into
57 m_colorBuffer = context->createTexture();
58 context->bindTexture(GraphicsContext3D::TEXTURE_2D, m_colorBuffer);
59 context->texParameterf(GraphicsContext3D::TEXTURE_2D, GraphicsContext3D::TEXTURE_MAG_FILTER, GraphicsContext3D::LINEAR);
60 context->texParameterf(GraphicsContext3D::TEXTURE_2D, GraphicsContext3D::TEXTURE_MIN_FILTER, GraphicsContext3D::LINEAR);
61 context->texParameteri(GraphicsContext3D::TEXTURE_2D, GraphicsContext3D::TEXTURE_WRAP_S, GraphicsContext3D::CLAMP_TO_EDGE);
62 context->texParameteri(GraphicsContext3D::TEXTURE_2D, GraphicsContext3D::TEXTURE_WRAP_T, GraphicsContext3D::CLAMP_TO_EDGE);
63 context->bindTexture(GraphicsContext3D::TEXTURE_2D, 0);
64
65 // Create the FBO
66 m_fbo = context->createFramebuffer();
67 ASSERT(m_fbo);
68 if (!m_fbo) {
69 clear();
70 return;
71 }
72
73 createSecondaryBuffers();
74 reset(size);
75 }
76
~DrawingBuffer()77 DrawingBuffer::~DrawingBuffer()
78 {
79 clear();
80 }
81
didReset()82 void DrawingBuffer::didReset()
83 {
84 }
85
86 #if USE(ACCELERATED_COMPOSITING)
platformLayer()87 PlatformLayer* DrawingBuffer::platformLayer()
88 {
89 return 0;
90 }
91 #endif
92
platformColorBuffer() const93 Platform3DObject DrawingBuffer::platformColorBuffer() const
94 {
95 return m_colorBuffer;
96 }
97
98 }
99
100 #endif
101