/* libs/opengles/mipmap.cpp ** ** Copyright 2006, The Android Open Source Project ** ** Licensed under the Apache License, Version 2.0 (the "License"); ** you may not use this file except in compliance with the License. ** You may obtain a copy of the License at ** ** http://www.apache.org/licenses/LICENSE-2.0 ** ** Unless required by applicable law or agreed to in writing, software ** distributed under the License is distributed on an "AS IS" BASIS, ** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. ** See the License for the specific language governing permissions and ** limitations under the License. */ #include <stdio.h> #include <stdlib.h> #include "context.h" #include "state.h" #include "texture.h" #include "TextureObjectManager.h" namespace android { // ---------------------------------------------------------------------------- status_t buildAPyramid(ogles_context_t* c, EGLTextureObject* tex) { int level = 0; const GGLSurface* base = &tex->surface; const GGLFormat& pixelFormat(c->rasterizer.formats[base->format]); int w = base->width; int h = base->height; if ((w&h) == 1) return NO_ERROR; w = (w>>1) ? : 1; h = (h>>1) ? : 1; while(true) { ++level; const int bpr = w * pixelFormat.size; if (tex->reallocate(level, w, h, w, base->format, base->compressedFormat, bpr) != NO_ERROR) { return NO_MEMORY; } int stride = w; int bs = base->stride; GGLSurface& cur = tex->editMip(level); if (base->format == GGL_PIXEL_FORMAT_RGB_565) { uint16_t const * src = (uint16_t const *)base->data; uint16_t* dst = (uint16_t*)cur.data; const uint32_t mask = 0x07E0F81F; for (int y=0 ; y<h ; y++) { size_t offset = (y*2) * bs; for (int x=0 ; x<w ; x++) { uint32_t p00 = src[offset]; uint32_t p10 = src[offset+1]; uint32_t p01 = src[offset+bs]; uint32_t p11 = src[offset+bs+1]; p00 = (p00 | (p00 << 16)) & mask; p01 = (p01 | (p01 << 16)) & mask; p10 = (p10 | (p10 << 16)) & mask; p11 = (p11 | (p11 << 16)) & mask; uint32_t grb = ((p00 + p10 + p01 + p11) >> 2) & mask; uint32_t rgb = (grb & 0xFFFF) | (grb >> 16); dst[x + y*stride] = rgb; offset += 2; } } } else if (base->format == GGL_PIXEL_FORMAT_RGBA_5551) { uint16_t const * src = (uint16_t const *)base->data; uint16_t* dst = (uint16_t*)cur.data; for (int y=0 ; y<h ; y++) { size_t offset = (y*2) * bs; for (int x=0 ; x<w ; x++) { uint32_t p00 = src[offset]; uint32_t p10 = src[offset+1]; uint32_t p01 = src[offset+bs]; uint32_t p11 = src[offset+bs+1]; uint32_t r = ((p00>>11)+(p10>>11)+(p01>>11)+(p11>>11)+2)>>2; uint32_t g = (((p00>>6)+(p10>>6)+(p01>>6)+(p11>>6)+2)>>2)&0x3F; uint32_t b = ((p00&0x3E)+(p10&0x3E)+(p01&0x3E)+(p11&0x3E)+4)>>3; uint32_t a = ((p00&1)+(p10&1)+(p01&1)+(p11&1)+2)>>2; dst[x + y*stride] = (r<<11)|(g<<6)|(b<<1)|a; offset += 2; } } } else if (base->format == GGL_PIXEL_FORMAT_RGBA_8888) { uint32_t const * src = (uint32_t const *)base->data; uint32_t* dst = (uint32_t*)cur.data; for (int y=0 ; y<h ; y++) { size_t offset = (y*2) * bs; for (int x=0 ; x<w ; x++) { uint32_t p00 = src[offset]; uint32_t p10 = src[offset+1]; uint32_t p01 = src[offset+bs]; uint32_t p11 = src[offset+bs+1]; uint32_t rb00 = p00 & 0x00FF00FF; uint32_t rb01 = p01 & 0x00FF00FF; uint32_t rb10 = p10 & 0x00FF00FF; uint32_t rb11 = p11 & 0x00FF00FF; uint32_t ga00 = (p00 >> 8) & 0x00FF00FF; uint32_t ga01 = (p01 >> 8) & 0x00FF00FF; uint32_t ga10 = (p10 >> 8) & 0x00FF00FF; uint32_t ga11 = (p11 >> 8) & 0x00FF00FF; uint32_t rb = (rb00 + rb01 + rb10 + rb11)>>2; uint32_t ga = (ga00 + ga01 + ga10 + ga11)>>2; uint32_t rgba = (rb & 0x00FF00FF) | ((ga & 0x00FF00FF)<<8); dst[x + y*stride] = rgba; offset += 2; } } } else if ((base->format == GGL_PIXEL_FORMAT_RGB_888) || (base->format == GGL_PIXEL_FORMAT_LA_88) || (base->format == GGL_PIXEL_FORMAT_A_8) || (base->format == GGL_PIXEL_FORMAT_L_8)) { int skip; switch (base->format) { case GGL_PIXEL_FORMAT_RGB_888: skip = 3; break; case GGL_PIXEL_FORMAT_LA_88: skip = 2; break; default: skip = 1; break; } uint8_t const * src = (uint8_t const *)base->data; uint8_t* dst = (uint8_t*)cur.data; bs *= skip; stride *= skip; for (int y=0 ; y<h ; y++) { size_t offset = (y*2) * bs; for (int x=0 ; x<w ; x++) { for (int c=0 ; c<skip ; c++) { uint32_t p00 = src[c+offset]; uint32_t p10 = src[c+offset+skip]; uint32_t p01 = src[c+offset+bs]; uint32_t p11 = src[c+offset+bs+skip]; dst[x + y*stride + c] = (p00 + p10 + p01 + p11) >> 2; } offset += 2*skip; } } } else if (base->format == GGL_PIXEL_FORMAT_RGBA_4444) { uint16_t const * src = (uint16_t const *)base->data; uint16_t* dst = (uint16_t*)cur.data; for (int y=0 ; y<h ; y++) { size_t offset = (y*2) * bs; for (int x=0 ; x<w ; x++) { uint32_t p00 = src[offset]; uint32_t p10 = src[offset+1]; uint32_t p01 = src[offset+bs]; uint32_t p11 = src[offset+bs+1]; p00 = ((p00 << 12) & 0x0F0F0000) | (p00 & 0x0F0F); p10 = ((p10 << 12) & 0x0F0F0000) | (p10 & 0x0F0F); p01 = ((p01 << 12) & 0x0F0F0000) | (p01 & 0x0F0F); p11 = ((p11 << 12) & 0x0F0F0000) | (p11 & 0x0F0F); uint32_t rbga = (p00 + p10 + p01 + p11) >> 2; uint32_t rgba = (rbga & 0x0F0F) | ((rbga>>12) & 0xF0F0); dst[x + y*stride] = rgba; offset += 2; } } } else { LOGE("Unsupported format (%d)", base->format); return BAD_TYPE; } // exit condition: we just processed the 1x1 LODs if ((w&h) == 1) break; base = &cur; w = (w>>1) ? : 1; h = (h>>1) ? : 1; } return NO_ERROR; } }; // namespace android