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      1 //
      2 // Copyright (c) 2013 The ANGLE Project Authors. All rights reserved.
      3 // Use of this source code is governed by a BSD-style license that can be
      4 // found in the LICENSE file.
      5 //
      6 
      7 // formatutils.h: Queries for GL image formats.
      8 
      9 #ifndef LIBGLESV2_FORMATUTILS_H_
     10 #define LIBGLESV2_FORMATUTILS_H_
     11 
     12 #include "libGLESv2/Caps.h"
     13 #include "libGLESv2/angletypes.h"
     14 
     15 #include "angle_gl.h"
     16 
     17 #include <cstddef>
     18 #include <cstdint>
     19 
     20 typedef void (*MipGenerationFunction)(size_t sourceWidth, size_t sourceHeight, size_t sourceDepth,
     21                                       const uint8_t *sourceData, size_t sourceRowPitch, size_t sourceDepthPitch,
     22                                       uint8_t *destData, size_t destRowPitch, size_t destDepthPitch);
     23 
     24 typedef void (*LoadImageFunction)(size_t width, size_t height, size_t depth,
     25                                   const uint8_t *input, size_t inputRowPitch, size_t inputDepthPitch,
     26                                   uint8_t *output, size_t outputRowPitch, size_t outputDepthPitch);
     27 
     28 typedef void (*InitializeTextureDataFunction)(size_t width, size_t height, size_t depth,
     29                                               uint8_t *output, size_t outputRowPitch, size_t outputDepthPitch);
     30 
     31 typedef void (*ColorReadFunction)(const uint8_t *source, uint8_t *dest);
     32 typedef void (*ColorWriteFunction)(const uint8_t *source, uint8_t *dest);
     33 typedef void (*ColorCopyFunction)(const uint8_t *source, uint8_t *dest);
     34 
     35 typedef void (*VertexCopyFunction)(const uint8_t *input, size_t stride, size_t count, uint8_t *output);
     36 
     37 namespace gl
     38 {
     39 
     40 struct FormatType
     41 {
     42     FormatType();
     43 
     44     GLenum internalFormat;
     45     ColorWriteFunction colorWriteFunction;
     46 };
     47 const FormatType &GetFormatTypeInfo(GLenum format, GLenum type);
     48 
     49 struct Type
     50 {
     51     Type();
     52 
     53     GLuint bytes;
     54     bool specialInterpretation;
     55 };
     56 const Type &GetTypeInfo(GLenum type);
     57 
     58 struct InternalFormat
     59 {
     60     InternalFormat();
     61 
     62     GLuint redBits;
     63     GLuint greenBits;
     64     GLuint blueBits;
     65 
     66     GLuint luminanceBits;
     67 
     68     GLuint alphaBits;
     69     GLuint sharedBits;
     70 
     71     GLuint depthBits;
     72     GLuint stencilBits;
     73 
     74     GLuint pixelBytes;
     75 
     76     GLuint componentCount;
     77 
     78     bool compressed;
     79     GLuint compressedBlockWidth;
     80     GLuint compressedBlockHeight;
     81 
     82     GLenum format;
     83     GLenum type;
     84 
     85     GLenum componentType;
     86     GLenum colorEncoding;
     87 
     88     typedef bool (*SupportCheckFunction)(GLuint, const Extensions &);
     89     SupportCheckFunction textureSupport;
     90     SupportCheckFunction renderSupport;
     91     SupportCheckFunction filterSupport;
     92 
     93     GLuint computeRowPitch(GLenum type, GLsizei width, GLint alignment) const;
     94     GLuint computeDepthPitch(GLenum type, GLsizei width, GLsizei height, GLint alignment) const;
     95     GLuint computeBlockSize(GLenum type, GLsizei width, GLsizei height) const;
     96 };
     97 const InternalFormat &GetInternalFormatInfo(GLenum internalFormat);
     98 
     99 GLenum GetSizedInternalFormat(GLenum internalFormat, GLenum type);
    100 
    101 typedef std::set<GLenum> FormatSet;
    102 const FormatSet &GetAllSizedInternalFormats();
    103 
    104 }
    105 
    106 #endif // LIBGLESV2_FORMATUTILS_H_
    107