From 559a1072dab3c67f06fe23f4ad0dc15b771608c9 Mon Sep 17 00:00:00 2001 From: Iago Toral Quiroga Date: Fri, 5 Dec 2014 13:10:08 +0100 Subject: [PATCH] mesa: Add helper to convert a GL format and type to a mesa (array) format. v2 after review by Jason Ekstrand: - Move _mesa_format_from_format_and_type to glformats - Return a mesa_format for GL_UNSIGNED_INT_8_8_8_8(_REV) v3: - Adapted to the new implementation of mesa_array_format as a plain uint32_t bitfield. Reviewed-by: Jason Ekstrand --- src/mesa/main/glformats.c | 277 ++++++++++++++++++++++++++++++++++++++ src/mesa/main/glformats.h | 2 + 2 files changed, 279 insertions(+) diff --git a/src/mesa/main/glformats.c b/src/mesa/main/glformats.c index 6bd6c70af46..ca0b62d4b3c 100644 --- a/src/mesa/main/glformats.c +++ b/src/mesa/main/glformats.c @@ -27,6 +27,7 @@ #include "context.h" #include "glformats.h" +#include "formats.h" #include "enums.h" enum { @@ -2404,3 +2405,279 @@ _mesa_es3_error_check_format_and_type(GLenum format, GLenum type, return GL_NO_ERROR; } + +static void +set_swizzle(uint8_t *swizzle, int x, int y, int z, int w) +{ + swizzle[MESA_FORMAT_SWIZZLE_X] = x; + swizzle[MESA_FORMAT_SWIZZLE_Y] = y; + swizzle[MESA_FORMAT_SWIZZLE_Z] = z; + swizzle[MESA_FORMAT_SWIZZLE_W] = w; +} + +static bool +get_swizzle_from_gl_format(GLenum format, uint8_t *swizzle) +{ + switch (format) { + case GL_RGBA: + case GL_RGBA_INTEGER_EXT: + set_swizzle(swizzle, 0, 1, 2, 3); + return true; + case GL_BGRA: + case GL_BGRA_INTEGER_EXT: + set_swizzle(swizzle, 2, 1, 0, 3); + return true; + case GL_ABGR_EXT: + set_swizzle(swizzle, 3, 2, 1, 0); + return true; + case GL_RGB: + case GL_RGB_INTEGER_EXT: + set_swizzle(swizzle, 0, 1, 2, 5); + return true; + case GL_BGR: + case GL_BGR_INTEGER_EXT: + set_swizzle(swizzle, 2, 1, 0, 5); + return true; + case GL_LUMINANCE_ALPHA: + case GL_LUMINANCE_ALPHA_INTEGER_EXT: + set_swizzle(swizzle, 0, 0, 0, 1); + return true; + case GL_RG: + case GL_RG_INTEGER: + set_swizzle(swizzle, 0, 1, 4, 5); + return true; + case GL_RED: + case GL_RED_INTEGER_EXT: + set_swizzle(swizzle, 0, 4, 4, 5); + return true; + case GL_GREEN: + case GL_GREEN_INTEGER_EXT: + set_swizzle(swizzle, 4, 0, 4, 5); + return true; + case GL_BLUE: + case GL_BLUE_INTEGER_EXT: + set_swizzle(swizzle, 4, 4, 0, 5); + return true; + case GL_ALPHA: + case GL_ALPHA_INTEGER_EXT: + set_swizzle(swizzle, 4, 4, 4, 0); + return true; + case GL_LUMINANCE: + case GL_LUMINANCE_INTEGER_EXT: + set_swizzle(swizzle, 0, 0, 0, 5); + return true; + case GL_INTENSITY: + set_swizzle(swizzle, 0, 0, 0, 0); + return true; + default: + return false; + } +} + +/** +* Take an OpenGL format (GL_RGB, GL_RGBA, etc), OpenGL data type (GL_INT, +* GL_FOAT, etc) and return a matching mesa_array_format or a mesa_format +* otherwise (for non-array formats). +* +* This function will typically be used to compute a mesa format from a GL type +* so we can then call _mesa_format_convert. This function does +* not consider byte swapping, so it returns types assuming that no byte +* swapping is involved. If byte swapping is involved then clients are supposed +* to handle that on their side before calling _mesa_format_convert. +* +* This function returns an uint32_t that can pack a mesa_format or a +* mesa_array_format. Clients must check the mesa array format bit +* (MESA_ARRAY_FORMAT_BIT) on the return value to know if the returned +* format is a mesa_array_format or a mesa_format. +*/ +uint32_t +_mesa_format_from_format_and_type(GLenum format, GLenum type) +{ + mesa_array_format array_format; + + bool is_array_format = true; + uint8_t swizzle[4]; + bool normalized = false, is_float = false, is_signed = false; + int num_channels = 0, type_size = 0; + + /* Extract array format type information from the OpenGL data type */ + switch (type) { + case GL_UNSIGNED_BYTE: + type_size = 1; + break; + case GL_BYTE: + type_size = 1; + is_signed = true; + break; + case GL_UNSIGNED_SHORT: + type_size = 2; + break; + case GL_SHORT: + type_size = 2; + is_signed = true; + break; + case GL_UNSIGNED_INT: + type_size = 4; + break; + case GL_INT: + type_size = 4; + is_signed = true; + break; + case GL_HALF_FLOAT: + type_size = 2; + is_signed = true; + is_float = true; + break; + case GL_FLOAT: + type_size = 4; + is_signed = true; + is_float = true; + break; + default: + is_array_format = false; + break; + } + + /* Extract array format swizzle information from the OpenGL format */ + if (is_array_format) + is_array_format = get_swizzle_from_gl_format(format, swizzle); + + /* If this is an array format type after checking data type and format, + * create the array format + */ + if (is_array_format) { + normalized = !_mesa_is_enum_format_integer(format); + num_channels = _mesa_components_in_format(format); + + array_format = + MESA_ARRAY_FORMAT(type_size, is_signed, is_float, + normalized, num_channels, + swizzle[0], swizzle[1], swizzle[2], swizzle[3]); + + if (!_mesa_little_endian()) + array_format = _mesa_array_format_flip_channels(array_format); + + return array_format; + } + + /* Otherwise this is not an array format, so return the mesa_format + * matching the OpenGL format and data type + */ + switch (type) { + case GL_UNSIGNED_SHORT_5_6_5: + if (format == GL_RGB) + return MESA_FORMAT_B5G6R5_UNORM; + else if (format == GL_BGR) + return MESA_FORMAT_R5G6B5_UNORM; + break; + case GL_UNSIGNED_SHORT_5_6_5_REV: + if (format == GL_RGB) + return MESA_FORMAT_R5G6B5_UNORM; + else if (format == GL_BGR) + return MESA_FORMAT_B5G6R5_UNORM; + break; + case GL_UNSIGNED_SHORT_4_4_4_4: + if (format == GL_RGBA) + return MESA_FORMAT_A4B4G4R4_UNORM; + else if (format == GL_BGRA) + return MESA_FORMAT_A4R4G4B4_UNORM; + else if (format == GL_ABGR_EXT) + return MESA_FORMAT_R4G4B4A4_UNORM; + break; + case GL_UNSIGNED_SHORT_4_4_4_4_REV: + if (format == GL_RGBA) + return MESA_FORMAT_R4G4B4A4_UNORM; + else if (format == GL_BGRA) + return MESA_FORMAT_B4G4R4A4_UNORM; + else if (format == GL_ABGR_EXT) + return MESA_FORMAT_A4B4G4R4_UNORM; + break; + case GL_UNSIGNED_SHORT_5_5_5_1: + if (format == GL_RGBA) + return MESA_FORMAT_A1B5G5R5_UNORM; + else if (format == GL_BGRA) + return MESA_FORMAT_A1R5G5B5_UNORM; + else if (format == GL_ABGR_EXT) + return MESA_FORMAT_R1G5B5A5_UNORM; + break; + case GL_UNSIGNED_SHORT_1_5_5_5_REV: + if (format == GL_RGBA) + return MESA_FORMAT_R5G5B5A1_UNORM; + else if (format == GL_BGRA) + return MESA_FORMAT_B5G5R5A1_UNORM; + else if (format == GL_ABGR_EXT) + return MESA_FORMAT_A5B5G5R1_UNORM; + break; + case GL_UNSIGNED_BYTE_3_3_2: + if (format == GL_RGB) + return MESA_FORMAT_B2G3R3_UNORM; + break; + case GL_UNSIGNED_BYTE_2_3_3_REV: + if (format == GL_RGB) + return MESA_FORMAT_R3G3B2_UNORM; + break; + case GL_UNSIGNED_INT_5_9_9_9_REV: + if (format == GL_RGB) + return MESA_FORMAT_R9G9B9E5_FLOAT; + break; + case GL_UNSIGNED_INT_10_10_10_2: + if (format == GL_RGBA) + return MESA_FORMAT_A2B10G10R10_UNORM; + else if (format == GL_RGBA_INTEGER) + return MESA_FORMAT_A2B10G10R10_UINT; + else if (format == GL_BGRA) + return MESA_FORMAT_A2R10G10B10_UNORM; + else if (format == GL_BGRA_INTEGER) + return MESA_FORMAT_A2R10G10B10_UINT; + else if (format == GL_ABGR_EXT) + return MESA_FORMAT_R2G10B10A10_UNORM; + break; + case GL_UNSIGNED_INT_2_10_10_10_REV: + if (format == GL_RGBA) + return MESA_FORMAT_R10G10B10A2_UNORM; + else if (format == GL_RGBA_INTEGER) + return MESA_FORMAT_R10G10B10A2_UINT; + else if (format == GL_BGRA) + return MESA_FORMAT_B10G10R10A2_UNORM; + else if (format == GL_BGRA_INTEGER) + return MESA_FORMAT_B10G10R10A2_UINT; + else if (format == GL_ABGR_EXT) + return MESA_FORMAT_A10B10G10R2_UNORM; + break; + case GL_UNSIGNED_INT_8_8_8_8: + if (format == GL_RGBA) + return MESA_FORMAT_A8B8G8R8_UNORM; + else if (format == GL_BGRA) + return MESA_FORMAT_A8R8G8B8_UNORM; + else if (format == GL_ABGR_EXT) + return MESA_FORMAT_R8G8B8A8_UNORM; + break; + case GL_UNSIGNED_INT_8_8_8_8_REV: + if (format == GL_RGBA) + return MESA_FORMAT_R8G8B8A8_UNORM; + else if (format == GL_BGRA) + return MESA_FORMAT_B8G8R8A8_UNORM; + else if (format == GL_ABGR_EXT) + return MESA_FORMAT_A8B8G8R8_UNORM; + break; + case GL_UNSIGNED_SHORT_8_8_MESA: + if (format == GL_YCBCR_MESA) + return MESA_FORMAT_YCBCR; + break; + case GL_UNSIGNED_SHORT_8_8_REV_MESA: + if (format == GL_YCBCR_MESA) + return MESA_FORMAT_YCBCR_REV; + break; + case GL_UNSIGNED_INT_10F_11F_11F_REV: + if (format == GL_RGB) + return MESA_FORMAT_R11G11B10_FLOAT; + default: + break; + } + + /* If we got here it means that we could not find a Mesa format that + * matches the GL format/type provided. We may need to add a new Mesa + * format in that case. + */ + assert(!"Unsupported format"); +} diff --git a/src/mesa/main/glformats.h b/src/mesa/main/glformats.h index 584909bfa45..f77edfa360a 100644 --- a/src/mesa/main/glformats.h +++ b/src/mesa/main/glformats.h @@ -128,6 +128,8 @@ extern GLenum _mesa_es3_error_check_format_and_type(GLenum format, GLenum type, GLenum internalFormat); +extern uint32_t +_mesa_format_from_format_and_type(GLenum format, GLenum type); #ifdef __cplusplus } -- 2.30.2