FGFS-4.1/OpenSceneGraph
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copySubImage support for block compressed images, added support for astc compressed type.

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This commit is contained in:
Laurens Voerman
2017-10-13 16:54:04 +02:00
parent 4d67c80350
commit 274cea19bf
2 changed files with 319 additions and 47 deletions
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39
include/osg/Image
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@@ -17,6 +17,7 @@
#include <osg/BufferObject>
#include <osg/Vec2>
#include <osg/Vec3>
#include <osg/Vec3i>
#include <osg/Vec4>
#include <osg/FrameStamp>
#include <osg/StateAttribute>
@@ -118,6 +119,38 @@
#define GL_COMPRESSED_SIGNED_RG11_EAC 0x9273
#endif
#ifndef GL_KHR_texture_compression_astc_hdr
#define GL_KHR_texture_compression_astc_hdr 1
#define GL_COMPRESSED_RGBA_ASTC_4x4_KHR 0x93B0
#define GL_COMPRESSED_RGBA_ASTC_5x4_KHR 0x93B1
#define GL_COMPRESSED_RGBA_ASTC_5x5_KHR 0x93B2
#define GL_COMPRESSED_RGBA_ASTC_6x5_KHR 0x93B3
#define GL_COMPRESSED_RGBA_ASTC_6x6_KHR 0x93B4
#define GL_COMPRESSED_RGBA_ASTC_8x5_KHR 0x93B5
#define GL_COMPRESSED_RGBA_ASTC_8x6_KHR 0x93B6
#define GL_COMPRESSED_RGBA_ASTC_8x8_KHR 0x93B7
#define GL_COMPRESSED_RGBA_ASTC_10x5_KHR 0x93B8
#define GL_COMPRESSED_RGBA_ASTC_10x6_KHR 0x93B9
#define GL_COMPRESSED_RGBA_ASTC_10x8_KHR 0x93BA
#define GL_COMPRESSED_RGBA_ASTC_10x10_KHR 0x93BB
#define GL_COMPRESSED_RGBA_ASTC_12x10_KHR 0x93BC
#define GL_COMPRESSED_RGBA_ASTC_12x12_KHR 0x93BD
#define GL_COMPRESSED_SRGB8_ALPHA8_ASTC_4x4_KHR 0x93D0
#define GL_COMPRESSED_SRGB8_ALPHA8_ASTC_5x4_KHR 0x93D1
#define GL_COMPRESSED_SRGB8_ALPHA8_ASTC_5x5_KHR 0x93D2
#define GL_COMPRESSED_SRGB8_ALPHA8_ASTC_6x5_KHR 0x93D3
#define GL_COMPRESSED_SRGB8_ALPHA8_ASTC_6x6_KHR 0x93D4
#define GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x5_KHR 0x93D5
#define GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x6_KHR 0x93D6
#define GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x8_KHR 0x93D7
#define GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x5_KHR 0x93D8
#define GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x6_KHR 0x93D9
#define GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x8_KHR 0x93DA
#define GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x10_KHR 0x93DB
#define GL_COMPRESSED_SRGB8_ALPHA8_ASTC_12x10_KHR 0x93DC
#define GL_COMPRESSED_SRGB8_ALPHA8_ASTC_12x12_KHR 0x93DD
#endif /* GL_KHR_texture_compression_astc_hdr */
#ifndef GL_DEPTH_COMPONENT
#define GL_DEPTH_COMPONENT 0x1902
#endif
@@ -408,11 +441,17 @@ class OSG_EXPORT Image : public BufferData
static bool isPackedType(GLenum type);
static GLenum computePixelFormat(GLenum pixelFormat);
static GLenum computeFormatDataType(GLenum pixelFormat);
/** return the dimensions of a block of compressed pixels */
static osg::Vec3i computeBlockFootprint(GLenum pixelFormat);
/** return the size in bytes of a block of compressed pixels */
static unsigned int computeBlockSize(GLenum pixelFormat, GLenum packing);
static unsigned int computeNumComponents(GLenum pixelFormat);
static unsigned int computePixelSizeInBits(GLenum pixelFormat,GLenum type);
static unsigned int computeRowWidthInBytes(int width,GLenum pixelFormat,GLenum type,int packing);
static unsigned int computeImageSizeInBytes(int width,int height, int depth, GLenum pixelFormat, GLenum type, int packing = 1, int slice_packing = 1, int image_packing = 1);
static int roudUpToMultiple(int s, int pack);
static int computeNearestPowerOfTwo(int s,float bias=0.5f);
static int computeNumberOfMipmapLevels(int s,int t = 1, int r = 1);