mirror of
https://github.com/leozide/leocad
synced 2024-11-17 07:47:55 +01:00
284 lines
7 KiB
C++
284 lines
7 KiB
C++
#include "lc_global.h"
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#include "lc_texture.h"
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#include "lc_application.h"
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#include "lc_library.h"
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#include "image.h"
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#include "system.h"
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#include "lc_glextensions.h"
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lcTexture* gGridTexture;
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lcTexture* lcLoadTexture(const QString& FileName, int Flags)
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{
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lcTexture* Texture = new lcTexture();
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if (!Texture->Load(FileName.toLatin1().constData(), Flags)) // todo: qstring
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{
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delete Texture;
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Texture = NULL;
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}
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return Texture;
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}
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void lcReleaseTexture(lcTexture* Texture)
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{
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if (Texture && Texture->Release() == 0)
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delete Texture;
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}
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lcTexture::lcTexture()
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{
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mTexture = 0;
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mRefCount = 0;
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}
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lcTexture::~lcTexture()
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{
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Unload();
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}
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void lcTexture::CreateGridTexture()
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{
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const int NumLevels = 9;
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Image GridImages[NumLevels];
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lcuint8* Previous = NULL;
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for (int ImageLevel = 0; ImageLevel < NumLevels; ImageLevel++)
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{
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Image& GridImage = GridImages[ImageLevel];
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const int GridSize = 256 >> ImageLevel;
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GridImage.Allocate(GridSize, GridSize, LC_PIXEL_FORMAT_A8);
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if (Previous)
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{
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int PreviousGridSize = 2 * GridSize;
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for (int y = 0; y < GridSize - 1; y++)
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{
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for (int x = 0; x < GridSize - 1; x++)
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{
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lcuint8 a = Previous[x * 2 + y * 2 * PreviousGridSize] > 64 ? 255 : 0;
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lcuint8 b = Previous[x * 2 + 1 + y * 2 * PreviousGridSize] > 64 ? 255 : 0;
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lcuint8 c = Previous[x * 2 + (y * 2 + 1) * PreviousGridSize] > 64 ? 255 : 0;
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lcuint8 d = Previous[x * 2 + 1 + (y * 2 + 1) * PreviousGridSize] > 64 ? 255 : 0;
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GridImage.mData[x + y * GridSize] = (a + b + c + d) / 4;
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}
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int x = GridSize - 1;
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lcuint8 a = Previous[x * 2 + y * 2 * PreviousGridSize];
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lcuint8 c = Previous[x * 2 + (y * 2 + 1) * PreviousGridSize];
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GridImage.mData[x + y * GridSize] = (a + c) / 2;
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}
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int y = GridSize - 1;
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for (int x = 0; x < GridSize - 1; x++)
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{
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lcuint8 a = Previous[x * 2 + y * 2 * PreviousGridSize];
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lcuint8 b = Previous[x * 2 + 1 + y * 2 * PreviousGridSize];
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GridImage.mData[x + y * GridSize] = (a + b) / 2;
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}
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int x = GridSize - 1;
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GridImage.mData[x + y * GridSize] = Previous[x + y * PreviousGridSize];
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}
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else
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{
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const float Radius1 = (80 >> ImageLevel) * (80 >> ImageLevel);
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const float Radius2 = (72 >> ImageLevel) * (72 >> ImageLevel);
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lcuint8* TempBuffer = new lcuint8[GridSize * GridSize];
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for (int y = 0; y < GridSize; y++)
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{
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lcuint8* Pixel = TempBuffer + y * GridSize;
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memset(Pixel, 0, GridSize);
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const float y2 = (y - GridSize / 2) * (y - GridSize / 2);
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if (Radius1 <= y2)
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continue;
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if (Radius2 <= y2)
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{
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int x1 = sqrtf(Radius1 - y2);
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for (int x = GridSize / 2 - x1; x < GridSize / 2 + x1; x++)
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Pixel[x] = 255;
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}
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else
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{
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int x1 = sqrtf(Radius1 - y2);
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int x2 = sqrtf(Radius2 - y2);
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for (int x = GridSize / 2 - x1; x < GridSize / 2 - x2; x++)
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Pixel[x] = 255;
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for (int x = GridSize / 2 + x2; x < GridSize / 2 + x1; x++)
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Pixel[x] = 255;
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}
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}
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for (int y = 0; y < GridSize - 1; y++)
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{
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for (int x = 0; x < GridSize - 1; x++)
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{
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lcuint8 a = TempBuffer[x + y * GridSize];
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lcuint8 b = TempBuffer[x + 1 + y * GridSize];
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lcuint8 c = TempBuffer[x + (y + 1) * GridSize];
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lcuint8 d = TempBuffer[x + 1 + (y + 1) * GridSize];
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GridImage.mData[x + y * GridSize] = (a + b + c + d) / 4;
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}
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int x = GridSize - 1;
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lcuint8 a = TempBuffer[x + y * GridSize];
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lcuint8 c = TempBuffer[x + (y + 1) * GridSize];
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GridImage.mData[x + y * GridSize] = (a + c) / 2;
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}
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int y = GridSize - 1;
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for (int x = 0; x < GridSize - 1; x++)
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{
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lcuint8 a = TempBuffer[x + y * GridSize];
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lcuint8 b = TempBuffer[x + 1 + y * GridSize];
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GridImage.mData[x + y * GridSize] = (a + b) / 2;
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}
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int x = GridSize - 1;
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GridImage.mData[x + y * GridSize] = TempBuffer[x + y * GridSize];
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delete[] TempBuffer;
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}
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Previous = GridImage.mData;
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}
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Load(GridImages, NumLevels, LC_TEXTURE_WRAPU | LC_TEXTURE_WRAPV | LC_TEXTURE_MIPMAPS | LC_TEXTURE_ANISOTROPIC);
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mRefCount = 1;
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}
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bool lcTexture::Load()
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{
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return lcGetPiecesLibrary()->LoadTexture(this);
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}
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bool lcTexture::Load(const char* FileName, int Flags)
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{
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Image image;
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if (!image.FileLoad(FileName))
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return false;
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return Load(image, Flags);
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}
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bool lcTexture::Load(lcMemFile& File, int Flags)
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{
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Image image;
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if (!image.FileLoad(File))
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return false;
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return Load(image, Flags);
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}
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bool lcTexture::Load(Image* images, int NumLevels, int Flags)
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{
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mWidth = images[0].mWidth;
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mHeight = images[0].mHeight;
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glGenTextures(1, &mTexture);
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int Filters[2][5] =
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{
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{ GL_NEAREST_MIPMAP_NEAREST, GL_NEAREST_MIPMAP_LINEAR, GL_LINEAR_MIPMAP_NEAREST, GL_LINEAR_MIPMAP_LINEAR, GL_LINEAR_MIPMAP_LINEAR },
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{ GL_NEAREST, GL_LINEAR, GL_LINEAR, GL_LINEAR, GL_LINEAR },
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};
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int FilterFlags = Flags & LC_TEXTURE_FILTER_MASK;
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int FilterIndex = FilterFlags >> LC_TEXTURE_FILTER_SHIFT;
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int MipIndex = Flags & LC_TEXTURE_MIPMAPS ? 0 : 1;
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glBindTexture(GL_TEXTURE_2D, mTexture);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, (Flags & LC_TEXTURE_WRAPU) ? GL_REPEAT : GL_CLAMP);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, (Flags & LC_TEXTURE_WRAPV) ? GL_REPEAT : GL_CLAMP);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, Filters[MipIndex][FilterIndex]);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, Filters[1][FilterIndex]);
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glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
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if (gSupportsAnisotropic && FilterFlags == LC_TEXTURE_ANISOTROPIC)
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glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAX_ANISOTROPY_EXT, lcMin(4.0f, gMaxAnisotropy));
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int Format;
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switch (images[0].mFormat)
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{
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default:
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case LC_PIXEL_FORMAT_INVALID:
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LC_ASSERT(false);
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Format = 0;
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break;
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case LC_PIXEL_FORMAT_A8:
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Format = GL_ALPHA;
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break;
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case LC_PIXEL_FORMAT_L8A8:
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Format = GL_LUMINANCE_ALPHA;
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break;
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case LC_PIXEL_FORMAT_R8G8B8:
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Format = GL_RGB;
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break;
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case LC_PIXEL_FORMAT_R8G8B8A8:
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Format = GL_RGBA;
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break;
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}
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void* Data = images[0].mData;
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glTexImage2D(GL_TEXTURE_2D, 0, Format, mWidth, mHeight, 0, Format, GL_UNSIGNED_BYTE, Data);
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if (Flags & LC_TEXTURE_MIPMAPS)
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{
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int Width = mWidth;
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int Height = mHeight;
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int Components = images[0].GetBPP();
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for (int Level = 1; ((Width != 1) || (Height != 1)); Level++)
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{
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int RowStride = Width * Components;
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Width = lcMax(1, Width >> 1);
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Height = lcMax(1, Height >> 1);
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if (NumLevels == 1)
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{
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GLubyte *Out, *In;
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In = Out = (GLubyte*)Data;
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for (int y = 0; y < Height; y++, In += RowStride)
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for (int x = 0; x < Width; x++, Out += Components, In += 2 * Components)
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for (int c = 0; c < Components; c++)
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Out[c] = (In[c] + In[c + Components] + In[RowStride] + In[c + RowStride + Components]) / 4;
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}
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else
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Data = images[Level].mData;
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glTexImage2D(GL_TEXTURE_2D, Level, Format, Width, Height, 0, Format, GL_UNSIGNED_BYTE, Data);
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}
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}
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glBindTexture(GL_TEXTURE_2D, 0);
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return true;
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}
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bool lcTexture::Load(Image& image, int Flags)
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{
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image.ResizePow2();
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return Load(&image, 1, Flags);
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}
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void lcTexture::Unload()
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{
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if (mTexture)
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glDeleteTextures(1, &mTexture);
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mTexture = 0;
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}
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