Open Source Tomb Raider Engine
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Texture.h 4.6KB

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  1. /*!
  2. * \file include/Texture.h
  3. * \brief Texture registry
  4. *
  5. * \author Mongoose
  6. * \author xythobuz
  7. */
  8. #ifndef _TEXTURE_H
  9. #define _TEXTURE_H
  10. #include <stdio.h>
  11. /*!
  12. * \brief Texture registry
  13. */
  14. class Texture {
  15. public:
  16. enum ColorMode {
  17. GREYSCALE = 1,
  18. RGB,
  19. RGBA,
  20. ARGB
  21. };
  22. enum TextureFlag {
  23. fUseMipmaps = (1 << 0),
  24. fUseMultiTexture = (1 << 1),
  25. };
  26. /*!
  27. * \brief Constructs an object of Texture
  28. */
  29. Texture();
  30. /*!
  31. * \brief Deconstructs an object of Texture
  32. */
  33. ~Texture();
  34. /*!
  35. * \brief Generates a texture buffer with (width * height * 4) bytes.
  36. * \param rgba 32bpp RGBA color to fill into buffer
  37. * \param width width of newly allocated buffer, power of 2, pref same as height
  38. * \param height height of newly allocated buffer, power of 2, pref same as width
  39. * \returns newly allocated texture buffer filled with specified color
  40. */
  41. static unsigned char *generateColorTexture(unsigned char rgba[4],
  42. unsigned int width,
  43. unsigned int height);
  44. /*!
  45. * \brief Get number of textures in use
  46. * \returns used texture count, or -1 on error (uninitialized)
  47. */
  48. int getTextureCount();
  49. /*!
  50. * \brief Dumps a screenshot to disk.
  51. *
  52. * Avoids overwriting files with same base name.
  53. * \param base base filename
  54. * \param width viewport width
  55. * \param height viewport height
  56. */
  57. void glScreenShot(char *base, unsigned int width, unsigned int height);
  58. /*!
  59. * \brief Sets up multitexture rendering with passed ids
  60. * \param texture0 first texture for multitexture
  61. * \param texture1 second texture for multitexture
  62. */
  63. void bindMultiTexture(int texture0, int texture1);
  64. /*!
  65. * \brief Binds the texture for use in GL
  66. * \param n valid texture index
  67. */
  68. void bindTextureId(unsigned int n);
  69. /*!
  70. * \brief Clears an option flag
  71. * \param flag flag to clear
  72. */
  73. void clearFlag(TextureFlag flag);
  74. void disableMultiTexture();
  75. /*!
  76. * \brief Loads Buffer as texture
  77. * \param image pixmap matching other params
  78. * \param width width of image
  79. * \param height height of image
  80. * \param mode mode of image
  81. * \param bpp bits per pixel of image
  82. * \returns texture ID or < 0 on error
  83. */
  84. int loadBuffer(unsigned char *image,
  85. unsigned int width, unsigned int height,
  86. ColorMode mode, unsigned int bpp);
  87. /*!
  88. * \brief Loads Buffer as texture
  89. * \param image pixmap matching other params
  90. * \param width width of image
  91. * \param height height of image
  92. * \param mode mode of image
  93. * \param bpp bits per pixel of image
  94. * \param slot slot (ID) of image
  95. * \returns texture ID or < 0 on error
  96. */
  97. int loadBufferSlot(unsigned char *image,
  98. unsigned int width, unsigned int height,
  99. ColorMode mode, unsigned int bpp,
  100. unsigned int slot);
  101. /*!
  102. * \brief Generates and loads a solid color texture.
  103. * \param rgba color for new texture
  104. * \param width width of new texture
  105. * \param height height of new texture
  106. * \returns texture ID or -1 on error
  107. */
  108. int loadColorTexture(unsigned char rgba[4],
  109. unsigned int width, unsigned int height);
  110. /*!
  111. * \brief Loads TGA file as texture
  112. * \param filename Existing TGA file
  113. * \returns ID of new texture or -1 on error
  114. */
  115. int loadTGA(const char *filename);
  116. /*!
  117. * \brief Resets all texture data
  118. */
  119. void reset();
  120. /*!
  121. * \brief Sets an option flag
  122. * \param flag flag to set
  123. */
  124. void setFlag(TextureFlag flag);
  125. /*!
  126. * \brief Sets up GL texturing.
  127. *
  128. * Must be called as first setup step!
  129. * \param n maximum number of textures you wish to allow
  130. */
  131. void setMaxTextureCount(unsigned int n);
  132. void useMultiTexture(float u, float v);
  133. void useMultiTexture(float aU, float aV, float bU, float bV);
  134. private:
  135. int nextPower(int seed);
  136. unsigned char *scaleBuffer(unsigned char *image, int width, int height,
  137. int components);
  138. unsigned int *mTextureIds; //!< GL texture list
  139. unsigned int mTextureCount; //!< Texture counter
  140. unsigned int mTextureLimit; //!< The texture limit
  141. unsigned int mFlags; //!< Class options
  142. int mTextureId; //!< Currently bound texture id
  143. int mTextureId2; //!< Multitexture Texture Id
  144. };
  145. #endif