Table of Contents Glide Programming Guide
Chapter 10. Managing Texture Memory 95
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- Chapter 11. Accessing the Linear Frame Buffer 117
| Chapter 10. Managing Texture Memory 95
1In This Chapter 95 2Texture Map Formats 95 3Narrow Channel Compression 96 4The Color Palette (not implemented in TMU Revision 0) 98 5Texture Memory 99 6Computing the Size of a Mipmap 99 7Querying for Available Memory 102 Example Managing Texture Memory.1 Will the mipmap fit? 103 Example Managing Texture Memory.2 Setting up to load several mipmaps. 103 8Downloading Mipmaps 104 1Downloading All or Part of a Mipmap 104 Figure Managing Texture Memory.3 Downloading a mipmap. 105 2Replacing a Single LOD 106 3Replacing Part of an LOD 107 9Identifying a Mipmap as the Texel Source 108 Example Managing Texture Memory.3 Downloading a texture for decal texture mapping. 109 Example Managing Texture Memory.4 Downloading two textures for modulated or composite texture mapping. 110 Example Managing Texture Memory.5 Splitting a texture across two TMUs for trilinear mipmapping. 111 10Loading a Mipmap into Fragmented Memory 112 Example Managing Texture Memory.6 Using multiple texture base registers. 113 11Downloading a Decompression Table or Color Palette 113 1Decompression Tables 114 Example Managing Texture Memory.7 Loading an NCC table. 115 2Color Palettes 115 Example Managing Texture Memory.8 Loading a color palette. 115 12Loading Mipmaps From Disk 115 Example Managing Texture Memory.9 Reading a .3DF file. 116 Chapter 11. Accessing the Linear Frame Buffer 117 1In This Chapter 117 2Acquiring an LFB Read or Write Pointer 117 3Calculating a Pixel Address 119 4Reading from the LFB 120 Example Accessing the Linear Frame Buffer.1 Reading a pixel value from the LFB. 122 5Reading a Rectangle of Pixels from the LFB 123 6Writing to the LFB 123 7Setting LFB Write Parameters 123 1Linear Frame Buffer Write Modes 124 2Setting Constant Color, Alpha, and Depth Values 127 3Establishing a y Origin 128 8Special Effects and Linear Frame Buffer Writes 128 1Disabling All Special Effects 128 Example Accessing the Linear Frame Buffer.2 Enabling specific special effects. 129 2What Happens When a Special Effect is Enabled During an LFB Write? 129 Example Accessing the Linear Frame Buffer.3 Writing one 565 RGB pixel to the back buffer (RGB ordering). 131 Example Accessing the Linear Frame Buffer.4 Writing two 565 RGB pixels to the back buffer (RGB color ordering). 131 Example Accessing the Linear Frame Buffer.5 Writing one 888 RGB pixel to the back buffer (ARGB color ordering). 131 9Writing a Rectangle of Pixels into the LFB 132 Download 6.22 Mb. Share with your friends:
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