2 Copyright (C) 2003 Rice1964
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.
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.
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.
24 #include "OGLGraphicsContext.h"
25 #include "OGLTexture.h"
26 #include "TextureManager.h"
29 #define GL_RGBA4 0x8056
32 COGLTexture::COGLTexture(uint32 dwWidth, uint32 dwHeight, TextureUsage usage) :
33 CTexture(dwWidth,dwHeight,usage),
36 // FIXME: If usage is AS_RENDER_TARGET, we need to create pbuffer instead of regular texture
38 m_dwTextureFmt = TEXTURE_FMT_A8R8G8B8; // Always use 32bit to load texture
39 glGenTextures( 1, &m_dwTextureName );
42 // Make the width and height be the power of 2
44 for (w = 1; w < dwWidth; w <<= 1);
45 m_dwCreatedTextureWidth = w;
46 for (w = 1; w < dwHeight; w <<= 1);
47 m_dwCreatedTextureHeight = w;
49 if (dwWidth*dwHeight > 256*256)
50 TRACE4("Large texture: (%d x %d), created as (%d x %d)",
51 dwWidth, dwHeight,m_dwCreatedTextureWidth,m_dwCreatedTextureHeight);
53 m_fYScale = (float)m_dwCreatedTextureHeight/(float)m_dwHeight;
54 m_fXScale = (float)m_dwCreatedTextureWidth/(float)m_dwWidth;
56 m_pTexture = malloc(m_dwCreatedTextureWidth * m_dwCreatedTextureHeight * GetPixelSize());
59 switch( options.textureQuality )
61 case TXT_QUALITY_DEFAULT:
62 if( options.colorQuality == TEXTURE_FMT_A4R4G4B4 )
65 case TXT_QUALITY_32BIT:
67 case TXT_QUALITY_16BIT:
73 LOG_TEXTURE(TRACE2("New texture: (%d, %d)", dwWidth, dwHeight));
76 COGLTexture::~COGLTexture()
78 // FIXME: If usage is AS_RENDER_TARGET, we need to destroy the pbuffer
80 glDeleteTextures(1, &m_dwTextureName );
88 bool COGLTexture::StartUpdate(DrawInfo *di)
90 if (m_pTexture == NULL)
93 di->dwHeight = (uint16)m_dwHeight;
94 di->dwWidth = (uint16)m_dwWidth;
95 di->dwCreatedHeight = m_dwCreatedTextureHeight;
96 di->dwCreatedWidth = m_dwCreatedTextureWidth;
97 di->lpSurface = m_pTexture;
98 di->lPitch = GetPixelSize()*m_dwCreatedTextureWidth;
103 void COGLTexture::EndUpdate(DrawInfo *di)
105 COGLGraphicsContext *pcontext = (COGLGraphicsContext *)(CGraphicsContext::g_pGraphicsContext); // we need this to check if the GL extension is avaible
107 glBindTexture(GL_TEXTURE_2D, m_dwTextureName);
110 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
114 if(options.mipmapping)
116 int m_maximumAnistropy = pcontext->getMaxAnisotropicFiltering(); //if getMaxAnisotropicFiltering() return more than 0, so aniso is supported and maxAnisotropicFiltering is set
118 // Set Anisotropic filtering (mipmapping have to be activated, aniso filtering is not effective without)
119 if( m_maximumAnistropy )
121 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAX_ANISOTROPY_EXT, m_maximumAnistropy);
126 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_NEAREST);
130 // Tell to hardware to generate mipmap (himself) when glTexImage2D is called
131 glTexParameteri(GL_TEXTURE_2D, GL_GENERATE_MIPMAP, GL_TRUE);
132 #elif SDL_VIDEO_OPENGL_ES2
133 glGenerateMipmap(GL_TEXTURE_2D);
139 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
143 // Copy the image data from main memory to video card texture memory
146 // first change format BGRA->RGBA and reduce bit if needed
147 unsigned char* m_glesTex;
148 if (m_glFmt == GL_RGBA4) {
149 m_glesTex = (unsigned char*)malloc(m_dwCreatedTextureHeight*m_dwCreatedTextureWidth*2);
150 unsigned short *p = (unsigned short*)m_glesTex;
151 unsigned char *f = (unsigned char*)m_pTexture;
152 for (int j=0; j<m_dwCreatedTextureHeight; j++)
153 for (int i=0; i<m_dwCreatedTextureWidth; i++) {
154 // *f = B, *(f+1) = G, *(f+2) = R, *(f+3) = A
155 // RRRR GGGG BBBB AAAA
156 *(p++)= ((*(f+2))&0xf0)>>4 | ((*(f+1))&0xf0) | (((*f))&0xf0)<<4 | ((*(f+3))&0xf0)<<8;
159 glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, m_dwCreatedTextureWidth, m_dwCreatedTextureHeight, 0, GL_RGBA, GL_UNSIGNED_SHORT_4_4_4_4, m_glesTex);
161 m_glesTex = (unsigned char*)malloc(m_dwCreatedTextureHeight*m_dwCreatedTextureWidth*4);
162 unsigned int *p = (unsigned int*)m_glesTex;
163 unsigned char *f = (unsigned char*)m_pTexture;
164 for (int j=0; j<m_dwCreatedTextureHeight; j++)
165 for (int i=0; i<m_dwCreatedTextureWidth; i++) {
166 // *f = B, *(f+1) = G, *(f+2) = R, *(f+3) = A
167 // AAAAAAAA BBBBBBBB GGGGGGGG RRRRRRRR
168 *(p++)= ((*(f+2))) | ((*(f+1)))<<8 | ((*f))<<16 | ((*(f+3)))<<24;
171 glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, m_dwCreatedTextureWidth, m_dwCreatedTextureHeight, 0, GL_RGBA, GL_UNSIGNED_BYTE, m_glesTex);
175 glTexImage2D(GL_TEXTURE_2D, 0, m_glFmt, m_dwCreatedTextureWidth, m_dwCreatedTextureHeight, 0, GL_BGRA_EXT, GL_UNSIGNED_BYTE, m_pTexture);
177 #elif SDL_VIDEO_OPENGL_ES2
178 //GL_BGRA_IMG works on adreno but not inside profiler.
179 glTexImage2D(GL_TEXTURE_2D, 0, m_glFmt, m_dwCreatedTextureWidth, m_dwCreatedTextureHeight, 0, GL_RGBA, GL_UNSIGNED_BYTE, m_pTexture);
185 // Keep in mind that the real texture is not scaled to fix the created opengl texture yet.
186 // when the image is need to be scaled, ScaleImageToSurface in CTexure will be called to
187 // scale the image automatically