/** * Extra utility functions related to EGL configs. */ #include #include #include #include "eglconfigutil.h" #include "egllog.h" /** * Convert an _EGLConfig to a __GLcontextModes object. * NOTE: This routine may be incomplete - we're only making sure that * the fields needed by Mesa (for _mesa_create_context/framebuffer) are * set correctly. */ void _eglConfigToContextModesRec(const _EGLConfig *config, __GLcontextModes *mode) { memset(mode, 0, sizeof(*mode)); mode->rgbMode = GL_TRUE; /* no color index */ mode->colorIndexMode = GL_FALSE; mode->doubleBufferMode = GL_TRUE; /* always DB for now */ mode->stereoMode = GL_FALSE; mode->redBits = GET_CONFIG_ATTRIB(config, EGL_RED_SIZE); mode->greenBits = GET_CONFIG_ATTRIB(config, EGL_GREEN_SIZE); mode->blueBits = GET_CONFIG_ATTRIB(config, EGL_BLUE_SIZE); mode->alphaBits = GET_CONFIG_ATTRIB(config, EGL_ALPHA_SIZE); mode->rgbBits = GET_CONFIG_ATTRIB(config, EGL_BUFFER_SIZE); /* no rgba masks - fix? */ mode->depthBits = GET_CONFIG_ATTRIB(config, EGL_DEPTH_SIZE); mode->haveDepthBuffer = mode->depthBits > 0; mode->stencilBits = GET_CONFIG_ATTRIB(config, EGL_STENCIL_SIZE); mode->haveStencilBuffer = mode->stencilBits > 0; /* no accum */ mode->level = GET_CONFIG_ATTRIB(config, EGL_LEVEL); mode->samples = GET_CONFIG_ATTRIB(config, EGL_SAMPLES); mode->sampleBuffers = GET_CONFIG_ATTRIB(config, EGL_SAMPLE_BUFFERS); /* surface type - not really needed */ mode->visualType = GLX_TRUE_COLOR; mode->renderType = GLX_RGBA_BIT; } /** * Creates a set of \c _EGLConfigs that a driver will expose. * * A set of \c __GLcontextModes will be created based on the supplied * parameters. The number of modes processed will be 2 * * \c num_depth_stencil_bits * \c num_db_modes. * * For the most part, data is just copied from \c depth_bits, \c stencil_bits, * \c db_modes, and \c visType into each \c __GLcontextModes element. * However, the meanings of \c fb_format and \c fb_type require further * explanation. The \c fb_format specifies which color components are in * each pixel and what the default order is. For example, \c GL_RGB specifies * that red, green, blue are available and red is in the "most significant" * position and blue is in the "least significant". The \c fb_type specifies * the bit sizes of each component and the actual ordering. For example, if * \c GL_UNSIGNED_SHORT_5_6_5_REV is specified with \c GL_RGB, bits [15:11] * are the blue value, bits [10:5] are the green value, and bits [4:0] are * the red value. * * One sublte issue is the combination of \c GL_RGB or \c GL_BGR and either * of the \c GL_UNSIGNED_INT_8_8_8_8 modes. The resulting mask values in the * \c __GLcontextModes structure is \b identical to the \c GL_RGBA or * \c GL_BGRA case, except the \c alphaMask is zero. This means that, as * far as this routine is concerned, \c GL_RGB with \c GL_UNSIGNED_INT_8_8_8_8 * still uses 32-bits. * * If in doubt, look at the tables used in the function. * * \param configs the array of configs generated * \param fb_format Format of the framebuffer. Currently only \c GL_RGB, * \c GL_RGBA, \c GL_BGR, and \c GL_BGRA are supported. * \param fb_type Type of the pixels in the framebuffer. Currently only * \c GL_UNSIGNED_SHORT_5_6_5, * \c GL_UNSIGNED_SHORT_5_6_5_REV, * \c GL_UNSIGNED_INT_8_8_8_8, and * \c GL_UNSIGNED_INT_8_8_8_8_REV are supported. * \param depth_bits Array of depth buffer sizes to be exposed. * \param stencil_bits Array of stencil buffer sizes to be exposed. * \param num_depth_stencil_bits Number of entries in both \c depth_bits and * \c stencil_bits. * \param db_modes Array of buffer swap modes. If an element has a * value of \c GLX_NONE, then it represents a * single-buffered mode. Other valid values are * \c GLX_SWAP_EXCHANGE_OML, \c GLX_SWAP_COPY_OML, and * \c GLX_SWAP_UNDEFINED_OML. See the * GLX_OML_swap_method extension spec for more details. * \param num_db_modes Number of entries in \c db_modes. * \param visType GLX visual type. Usually either \c GLX_TRUE_COLOR or * \c GLX_DIRECT_COLOR. * * \returns * \c GL_TRUE on success or \c GL_FALSE on failure. Currently the only * cause of failure is a bad parameter (i.e., unsupported \c fb_format or * \c fb_type). * * \todo * There is currently no way to support packed RGB modes (i.e., modes with * exactly 3 bytes per pixel) or floating-point modes. This could probably * be done by creating some new, private enums with clever names likes * \c GL_UNSIGNED_3BYTE_8_8_8, \c GL_4FLOAT_32_32_32_32, * \c GL_4HALF_16_16_16_16, etc. We can cross that bridge when we come to it. */ EGLBoolean _eglFillInConfigs(_EGLConfig * configs, GLenum fb_format, GLenum fb_type, const uint8_t * depth_bits, const uint8_t * stencil_bits, unsigned num_depth_stencil_bits, const GLenum * db_modes, unsigned num_db_modes, int visType) { static const uint8_t bits_table[3][4] = { /* R G B A */ { 5, 6, 5, 0 }, /* Any GL_UNSIGNED_SHORT_5_6_5 */ { 8, 8, 8, 0 }, /* Any RGB with any GL_UNSIGNED_INT_8_8_8_8 */ { 8, 8, 8, 8 } /* Any RGBA with any GL_UNSIGNED_INT_8_8_8_8 */ }; /* The following arrays are all indexed by the fb_type masked with 0x07. * Given the four supported fb_type values, this results in valid array * indices of 3, 4, 5, and 7. */ static const uint32_t masks_table_rgb[8][4] = { {0x00000000, 0x00000000, 0x00000000, 0x00000000}, {0x00000000, 0x00000000, 0x00000000, 0x00000000}, {0x00000000, 0x00000000, 0x00000000, 0x00000000}, {0x0000F800, 0x000007E0, 0x0000001F, 0x00000000}, /* 5_6_5 */ {0x0000001F, 0x000007E0, 0x0000F800, 0x00000000}, /* 5_6_5_REV */ {0xFF000000, 0x00FF0000, 0x0000FF00, 0x00000000}, /* 8_8_8_8 */ {0x00000000, 0x00000000, 0x00000000, 0x00000000}, {0x000000FF, 0x0000FF00, 0x00FF0000, 0x00000000} /* 8_8_8_8_REV */ }; static const uint32_t masks_table_rgba[8][4] = { {0x00000000, 0x00000000, 0x00000000, 0x00000000}, {0x00000000, 0x00000000, 0x00000000, 0x00000000}, {0x00000000, 0x00000000, 0x00000000, 0x00000000}, {0x0000F800, 0x000007E0, 0x0000001F, 0x00000000}, /* 5_6_5 */ {0x0000001F, 0x000007E0, 0x0000F800, 0x00000000}, /* 5_6_5_REV */ {0xFF000000, 0x00FF0000, 0x0000FF00, 0x000000FF}, /* 8_8_8_8 */ {0x00000000, 0x00000000, 0x00000000, 0x00000000}, {0x000000FF, 0x0000FF00, 0x00FF0000, 0xFF000000}, /* 8_8_8_8_REV */ }; #if 0 static const uint32_t masks_table_bgr[8][4] = { {0x00000000, 0x00000000, 0x00000000, 0x00000000}, {0x00000000, 0x00000000, 0x00000000, 0x00000000}, {0x00000000, 0x00000000, 0x00000000, 0x00000000}, {0x0000001F, 0x000007E0, 0x0000F800, 0x00000000}, /* 5_6_5 */ {0x0000F800, 0x000007E0, 0x0000001F, 0x00000000}, /* 5_6_5_REV */ {0x0000FF00, 0x00FF0000, 0xFF000000, 0x00000000}, /* 8_8_8_8 */ {0x00000000, 0x00000000, 0x00000000, 0x00000000}, {0x00FF0000, 0x0000FF00, 0x000000FF, 0x00000000}, /* 8_8_8_8_REV */ }; static const uint32_t masks_table_bgra[8][4] = { {0x00000000, 0x00000000, 0x00000000, 0x00000000}, {0x00000000, 0x00000000, 0x00000000, 0x00000000}, {0x00000000, 0x00000000, 0x00000000, 0x00000000}, {0x0000001F, 0x000007E0, 0x0000F800, 0x00000000}, /* 5_6_5 */ {0x0000F800, 0x000007E0, 0x0000001F, 0x00000000}, /* 5_6_5_REV */ {0x0000FF00, 0x00FF0000, 0xFF000000, 0x000000FF}, /* 8_8_8_8 */ {0x00000000, 0x00000000, 0x00000000, 0x00000000}, {0x00FF0000, 0x0000FF00, 0x000000FF, 0xFF000000}, /* 8_8_8_8_REV */ }; #endif static const uint8_t bytes_per_pixel[8] = { 0, 0, 0, 2, 2, 4, 0, 4 }; const uint8_t * bits; const uint32_t * masks; const int index = fb_type & 0x07; _EGLConfig *config; unsigned i; unsigned j; unsigned k; if ( bytes_per_pixel[index] == 0 ) { _eglLog(_EGL_INFO, "[_eglFillInConfigs:%u] Framebuffer type 0x%04x has 0 bytes per pixel.", __LINE__, fb_type); return GL_FALSE; } /* Valid types are GL_UNSIGNED_SHORT_5_6_5 and GL_UNSIGNED_INT_8_8_8_8 and * the _REV versions. * * Valid formats are GL_RGBA, GL_RGB, and GL_BGRA. */ switch ( fb_format ) { case GL_RGB: bits = (bytes_per_pixel[index] == 2) ? bits_table[0] : bits_table[1]; masks = masks_table_rgb[index]; break; case GL_RGBA: bits = (bytes_per_pixel[index] == 2) ? bits_table[0] : bits_table[2]; masks = masks_table_rgba[index]; break; #if 0 case GL_BGR: bits = (bytes_per_pixel[index] == 2) ? bits_table[0] : bits_table[1]; masks = masks_table_bgr[index]; break; case GL_BGRA: bits = (bytes_per_pixel[index] == 2) ? bits_table[0] : bits_table[2]; masks = masks_table_bgra[index]; break; #endif default: _eglLog(_EGL_WARNING, "[_eglFillInConfigs:%u] Framebuffer format 0x%04x is not GL_RGB, GL_RGBA, GL_BGR, or GL_BGRA.", __LINE__, fb_format); return GL_FALSE; } config = configs; for (k = 0; k < num_depth_stencil_bits; k++) { for (i = 0; i < num_db_modes; i++) { for (j = 0; j < 2; j++) { _eglSetConfigAttrib(config, EGL_RED_SIZE, bits[0]); _eglSetConfigAttrib(config, EGL_GREEN_SIZE, bits[1]); _eglSetConfigAttrib(config, EGL_BLUE_SIZE, bits[2]); _eglSetConfigAttrib(config, EGL_ALPHA_SIZE, bits[3]); _eglSetConfigAttrib(config, EGL_BUFFER_SIZE, bits[0] + bits[1] + bits[2] + bits[3]); _eglSetConfigAttrib(config, EGL_STENCIL_SIZE, stencil_bits[k]); _eglSetConfigAttrib(config, EGL_DEPTH_SIZE, depth_bits[i]); _eglSetConfigAttrib(config, EGL_SURFACE_TYPE, EGL_SCREEN_BIT_MESA | EGL_PBUFFER_BIT | EGL_PIXMAP_BIT | EGL_WINDOW_BIT); config++; } } } return GL_TRUE; }