| 1 | /* |
| 2 | Copyright (C) 2003 Rice1964 |
| 3 | |
| 4 | This program is free software; you can redistribute it and/or |
| 5 | modify it under the terms of the GNU General Public License |
| 6 | as published by the Free Software Foundation; either version 2 |
| 7 | of the License, or (at your option) any later version. |
| 8 | |
| 9 | This program is distributed in the hope that it will be useful, |
| 10 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 12 | GNU General Public License for more details. |
| 13 | |
| 14 | You should have received a copy of the GNU General Public License |
| 15 | along with this program; if not, write to the Free Software |
| 16 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
| 17 | */ |
| 18 | |
| 19 | #include <stdlib.h> |
| 20 | |
| 21 | #include "Config.h" |
| 22 | #include "Debugger.h" |
| 23 | #include "OGLDebug.h" |
| 24 | #include "OGLGraphicsContext.h" |
| 25 | #include "OGLTexture.h" |
| 26 | #include "TextureManager.h" |
| 27 | |
| 28 | COGLTexture::COGLTexture(uint32 dwWidth, uint32 dwHeight, TextureUsage usage) : |
| 29 | CTexture(dwWidth,dwHeight,usage), |
| 30 | m_glFmt(GL_RGBA) |
| 31 | { |
| 32 | // FIXME: If usage is AS_RENDER_TARGET, we need to create pbuffer instead of regular texture |
| 33 | |
| 34 | m_dwTextureFmt = TEXTURE_FMT_A8R8G8B8; // Always use 32bit to load texture |
| 35 | glGenTextures( 1, &m_dwTextureName ); |
| 36 | OPENGL_CHECK_ERRORS; |
| 37 | |
| 38 | // Make the width and height be the power of 2 |
| 39 | uint32 w; |
| 40 | for (w = 1; w < dwWidth; w <<= 1); |
| 41 | m_dwCreatedTextureWidth = w; |
| 42 | for (w = 1; w < dwHeight; w <<= 1); |
| 43 | m_dwCreatedTextureHeight = w; |
| 44 | |
| 45 | if (dwWidth*dwHeight > 256*256) |
| 46 | TRACE4("Large texture: (%d x %d), created as (%d x %d)", |
| 47 | dwWidth, dwHeight,m_dwCreatedTextureWidth,m_dwCreatedTextureHeight); |
| 48 | |
| 49 | m_fYScale = (float)m_dwCreatedTextureHeight/(float)m_dwHeight; |
| 50 | m_fXScale = (float)m_dwCreatedTextureWidth/(float)m_dwWidth; |
| 51 | |
| 52 | m_pTexture = malloc(m_dwCreatedTextureWidth * m_dwCreatedTextureHeight * GetPixelSize()); |
| 53 | |
| 54 | switch( options.textureQuality ) |
| 55 | { |
| 56 | case TXT_QUALITY_DEFAULT: |
| 57 | if( options.colorQuality == TEXTURE_FMT_A4R4G4B4 ) |
| 58 | m_glFmt = GL_RGBA4; |
| 59 | break; |
| 60 | case TXT_QUALITY_32BIT: |
| 61 | break; |
| 62 | case TXT_QUALITY_16BIT: |
| 63 | m_glFmt = GL_RGBA4; |
| 64 | break; |
| 65 | }; |
| 66 | LOG_TEXTURE(TRACE2("New texture: (%d, %d)", dwWidth, dwHeight)); |
| 67 | } |
| 68 | |
| 69 | COGLTexture::~COGLTexture() |
| 70 | { |
| 71 | // FIXME: If usage is AS_RENDER_TARGET, we need to destroy the pbuffer |
| 72 | |
| 73 | glDeleteTextures(1, &m_dwTextureName ); |
| 74 | OPENGL_CHECK_ERRORS; |
| 75 | free(m_pTexture); |
| 76 | m_pTexture = NULL; |
| 77 | m_dwWidth = 0; |
| 78 | m_dwHeight = 0; |
| 79 | } |
| 80 | |
| 81 | bool COGLTexture::StartUpdate(DrawInfo *di) |
| 82 | { |
| 83 | if (m_pTexture == NULL) |
| 84 | return false; |
| 85 | |
| 86 | di->dwHeight = (uint16)m_dwHeight; |
| 87 | di->dwWidth = (uint16)m_dwWidth; |
| 88 | di->dwCreatedHeight = m_dwCreatedTextureHeight; |
| 89 | di->dwCreatedWidth = m_dwCreatedTextureWidth; |
| 90 | di->lpSurface = m_pTexture; |
| 91 | di->lPitch = GetPixelSize()*m_dwCreatedTextureWidth; |
| 92 | |
| 93 | return true; |
| 94 | } |
| 95 | |
| 96 | void COGLTexture::EndUpdate(DrawInfo *di) |
| 97 | { |
| 98 | COGLGraphicsContext *pcontext = (COGLGraphicsContext *)(CGraphicsContext::g_pGraphicsContext); // we need this to check if the GL extension is avaible |
| 99 | |
| 100 | glBindTexture(GL_TEXTURE_2D, m_dwTextureName); |
| 101 | OPENGL_CHECK_ERRORS; |
| 102 | |
| 103 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR); |
| 104 | OPENGL_CHECK_ERRORS; |
| 105 | |
| 106 | // mipmap support |
| 107 | if(options.mipmapping) |
| 108 | { |
| 109 | int m_maximumAnistropy = pcontext->getMaxAnisotropicFiltering(); //if getMaxAnisotropicFiltering() return more than 0, so aniso is supported and maxAnisotropicFiltering is set |
| 110 | |
| 111 | // Set Anisotropic filtering (mipmapping have to be activated, aniso filtering is not effective without) |
| 112 | if( m_maximumAnistropy ) |
| 113 | { |
| 114 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAX_ANISOTROPY_EXT, m_maximumAnistropy); |
| 115 | OPENGL_CHECK_ERRORS; |
| 116 | } |
| 117 | |
| 118 | // Set Mipmap |
| 119 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_NEAREST); |
| 120 | OPENGL_CHECK_ERRORS; |
| 121 | |
| 122 | #if SDL_VIDEO_OPENGL |
| 123 | // Tell to hardware to generate mipmap (himself) when glTexImage2D is called |
| 124 | glTexParameteri(GL_TEXTURE_2D, GL_GENERATE_MIPMAP, GL_TRUE); |
| 125 | #elif SDL_VIDEO_OPENGL_ES2 |
| 126 | glGenerateMipmap(GL_TEXTURE_2D); |
| 127 | #endif |
| 128 | OPENGL_CHECK_ERRORS; |
| 129 | } |
| 130 | else |
| 131 | { |
| 132 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR); |
| 133 | OPENGL_CHECK_ERRORS; |
| 134 | } |
| 135 | |
| 136 | // Copy the image data from main memory to video card texture memory |
| 137 | #if SDL_VIDEO_OPENGL |
| 138 | glTexImage2D(GL_TEXTURE_2D, 0, m_glFmt, m_dwCreatedTextureWidth, m_dwCreatedTextureHeight, 0, GL_BGRA_EXT, GL_UNSIGNED_BYTE, m_pTexture); |
| 139 | #elif SDL_VIDEO_OPENGL_ES2 |
| 140 | //GL_BGRA_IMG works on adreno but not inside profiler. |
| 141 | glTexImage2D(GL_TEXTURE_2D, 0, m_glFmt, m_dwCreatedTextureWidth, m_dwCreatedTextureHeight, 0, GL_RGBA, GL_UNSIGNED_BYTE, m_pTexture); |
| 142 | #endif |
| 143 | OPENGL_CHECK_ERRORS; |
| 144 | } |
| 145 | |
| 146 | |
| 147 | // Keep in mind that the real texture is not scaled to fix the created opengl texture yet. |
| 148 | // when the image is need to be scaled, ScaleImageToSurface in CTexure will be called to |
| 149 | // scale the image automatically |
| 150 | |