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comparison src/modules/image/CompressedData.cpp @ 1420:2a5ef265e040 image-CompressedData

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Added support for DXT1/3/5 and BC5/7 compressed textures via love.image.CompressedData. Some internals are still iffy. - added a new CompressedData type to love.image - added love.image.isCompressed(file or data) - love.graphics.newImage automatically tests for compression when loading a file - added love.graphics.isSupported strings for DXT, BC5, and BC7 Compressed textures meant to be used on the GPU offer huge performance gains when - loading the texture from a file - loading the texture from RAM to VRAM - loading mipmaps - rendering
author Alex Szpakowski <slime73@gmail.com>
date Thu, 04 Apr 2013 19:09:18 -0300
parents
children aa603d1b03bc
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1419:edd946442f86 1420:2a5ef265e040
1 /**
2 * Copyright (c) 2006-2013 LOVE Development Team
3 *
4 * This software is provided 'as-is', without any express or implied
5 * warranty. In no event will the authors be held liable for any damages
6 * arising from the use of this software.
7 *
8 * Permission is granted to anyone to use this software for any purpose,
9 * including commercial applications, and to alter it and redistribute it
10 * freely, subject to the following restrictions:
11 *
12 * 1. The origin of this software must not be misrepresented; you must not
13 * claim that you wrote the original software. If you use this software
14 * in a product, an acknowledgment in the product documentation would be
15 * appreciated but is not required.
16 * 2. Altered source versions must be plainly marked as such, and must not be
17 * misrepresented as being the original software.
18 * 3. This notice may not be removed or altered from any source distribution.
19 **/
20
21 #include "CompressedData.h"
22
23 namespace love
24 {
25 namespace image
26 {
27
28 CompressedData::CompressedData()
29 : type(TYPE_MAX_ENUM)
30 {
31
32 }
33
34 CompressedData::~CompressedData()
35 {
36
37 }
38
39 int CompressedData::getSize() const
40 {
41 size_t totalsize = sizeof(MipmapInfo) * dataMipmapInfo.size();
42
43 for (size_t i = 0; i < dataMipmapInfo.size(); i++)
44 totalsize += dataMipmapInfo[i].size;
45
46 return totalsize;
47 }
48
49 void *CompressedData::getData() const
50 {
51 // ?
52 return (void *) &dataMipmapInfo[0].data[0];
53 }
54
55 int CompressedData::getNumMipmaps() const
56 {
57 return dataMipmapInfo.size();
58 }
59
60 int CompressedData::getSize(int miplevel) const
61 {
62 checkMipmapLevelExists(miplevel);
63
64 return dataMipmapInfo[miplevel].size;
65 }
66
67 void *CompressedData::getData(int miplevel) const
68 {
69 checkMipmapLevelExists(miplevel);
70
71 return (void *) &dataMipmapInfo[miplevel].data[0];
72 }
73
74 int CompressedData::getWidth(int miplevel) const
75 {
76 checkMipmapLevelExists(miplevel);
77
78 return dataMipmapInfo[miplevel].width;
79 }
80
81 int CompressedData::getHeight(int miplevel) const
82 {
83 checkMipmapLevelExists(miplevel);
84
85 return dataMipmapInfo[miplevel].height;
86 }
87
88 CompressedData::TextureType CompressedData::getType() const
89 {
90 return type;
91 }
92
93 void CompressedData::checkMipmapLevelExists(int miplevel) const
94 {
95 if (miplevel < 0 || miplevel >= dataMipmapInfo.size())
96 throw love::Exception("Mipmap level %d does not exist", miplevel);
97 }
98
99 bool CompressedData::getConstant(const char *in, CompressedData::TextureType &out)
100 {
101 return types.find(in, out);
102 }
103
104 bool CompressedData::getConstant(CompressedData::TextureType in, const char *&out)
105 {
106 return types.find(in, out);
107 }
108
109 StringMap<CompressedData::TextureType, CompressedData::TYPE_MAX_ENUM>::Entry CompressedData::typeEntries[] =
110 {
111 {"dxt1", CompressedData::TYPE_DXT1},
112 {"dxt3", CompressedData::TYPE_DXT3},
113 {"dxt5", CompressedData::TYPE_DXT5},
114 {"bc5s", CompressedData::TYPE_BC5s},
115 {"bc5u", CompressedData::TYPE_BC5u},
116 {"bc7", CompressedData::TYPE_BC7},
117 {"bc7srgb", CompressedData::TYPE_BC7srgb},
118 };
119
120 StringMap<CompressedData::TextureType, CompressedData::TYPE_MAX_ENUM> CompressedData::types(CompressedData::typeEntries, sizeof(CompressedData::typeEntries));
121
122 } // image
123 } // love