mirrors/raylib
1
0
Fork 0
mirror of https://github.com/raysan5/raylib.git synced 2025-10-11 20:36:29 +00:00
Code Issues Packages Projects Releases Wiki Activity

Support KXT image file export

Browse Source 
[textures] Added SaveKTX()
[rlgl] Exposed rlGetGlTextureFormats()
This commit is contained in:
Ray
2018-10-01 15:30:48 +02:00
parent ecb787d76f
commit d67edb591a
2 changed files with 154 additions and 67 deletions
Download Patch File Download Diff File Expand all files Collapse all files

93
src/textures.c
View File

@@ -148,6 +148,7 @@ static Image LoadPKM(const char *fileName); // Load PKM file
#endif
#if defined(SUPPORT_FILEFORMAT_KTX)
static Image LoadKTX(const char *fileName); // Load KTX file
static void SaveKTX(Image image, const char *fileName); // Save image data as KTX file
#endif
#if defined(SUPPORT_FILEFORMAT_PVR)
static Image LoadPVR(const char *fileName); // Load PVR file
@@ -726,10 +727,11 @@ void ExportImage(Image image, const char *fileName)
if (IsFileExtension(fileName, ".png")) success = stbi_write_png(fileName, image.width, image.height, 4, imgData, image.width*4);
else if (IsFileExtension(fileName, ".bmp")) success = stbi_write_bmp(fileName, image.width, image.height, 4, imgData);
else if (IsFileExtension(fileName, ".tga")) success = stbi_write_tga(fileName, image.width, image.height, 4, imgData);
else if (IsFileExtension(fileName, ".jpg")) success = stbi_write_jpg(fileName, image.width, image.height, 4, imgData, 80); // Between 1 and 100
else if (IsFileExtension(fileName, ".jpg")) success = stbi_write_jpg(fileName, image.width, image.height, 4, imgData, 80); // JPG quality: between 1 and 100
else if (IsFileExtension(fileName, ".ktx")) SaveKTX(image, fileName);
else if (IsFileExtension(fileName, ".raw"))
{
// Export raw pixel data
// Export raw pixel data (without header)
// NOTE: It's up to the user to track image parameters
FILE *rawFile = fopen(fileName, "wb");
fwrite(image.data, GetPixelDataSize(image.width, image.height, image.format), 1, rawFile);
@@ -2932,6 +2934,93 @@ static Image LoadKTX(const char *fileName)
return image;
}
// Save image data as KTX file
// NOTE: By default KTX 1.1 spec is used, 2.0 is still on draft (01Oct2018)
static void SaveKTX(Image image, const char *fileName)
{
// KTX file Header (64 bytes)
// v1.1 - https://www.khronos.org/opengles/sdk/tools/KTX/file_format_spec/
// v2.0 - http://github.khronos.org/KTX-Specification/ - still on draft, not ready for implementation
typedef struct {
char id[12]; // Identifier: "«KTX 11»\r\n\x1A\n" // KTX 2.0: "«KTX 22»\r\n\x1A\n"
unsigned int endianness; // Little endian: 0x01 0x02 0x03 0x04
unsigned int glType; // For compressed textures, glType must equal 0
unsigned int glTypeSize; // For compressed texture data, usually 1
unsigned int glFormat; // For compressed textures is 0
unsigned int glInternalFormat; // Compressed internal format
unsigned int glBaseInternalFormat; // Same as glFormat (RGB, RGBA, ALPHA...) // KTX 2.0: UInt32 vkFormat
unsigned int width; // Texture image width in pixels
unsigned int height; // Texture image height in pixels
unsigned int depth; // For 2D textures is 0
unsigned int elements; // Number of array elements, usually 0
unsigned int faces; // Cubemap faces, for no-cubemap = 1
unsigned int mipmapLevels; // Non-mipmapped textures = 1
unsigned int keyValueDataSize; // Used to encode any arbitrary data... // KTX 2.0: UInt32 levelOrder - ordering of the mipmap levels, usually 0
// KTX 2.0: UInt32 supercompressionScheme - 0 (None), 1 (Crunch CRN), 2 (Zlib DEFLATE)...
// KTX 2.0 defines additional header elements...
} KTXHeader;
// NOTE: Before start of every mipmap data block, we have: unsigned int dataSize
FILE *ktxFile = fopen(fileName, "wb");
if (ktxFile == NULL) TraceLog(LOG_WARNING, "[%s] KTX image file could not be created", fileName);
else
{
KTXHeader ktxHeader;
// KTX identifier (v2.2)
//unsigned char id[12] = { '«', 'K', 'T', 'X', ' ', '1', '1', '»', '\r', '\n', '\x1A', '\n' };
//unsigned char id[12] = { 0xAB, 0x4B, 0x54, 0x58, 0x20, 0x31, 0x31, 0xBB, 0x0D, 0x0A, 0x1A, 0x0A };
// Get the image header
strcpy(ktxHeader.id, "«KTX 11»\r\n\x1A\n"); // KTX 1.1 signature
ktxHeader.endianness = 0;
ktxHeader.glType = 0; // Obtained from image.format
ktxHeader.glTypeSize = 1;
ktxHeader.glFormat = 0; // Obtained from image.format
ktxHeader.glInternalFormat = 0; // Obtained from image.format
ktxHeader.glBaseInternalFormat = 0;
ktxHeader.width = image.width;
ktxHeader.height = image.height;
ktxHeader.depth = 0;
ktxHeader.elements = 0;
ktxHeader.faces = 1;
ktxHeader.mipmapLevels = image.mipmaps; // If it was 0, it means mipmaps should be generated on loading (not for compressed formats)
ktxHeader.keyValueDataSize = 0; // No extra data after the header
rlGetGlTextureFormats(image.format, &ktxHeader.glInternalFormat, &ktxHeader.glFormat, &ktxHeader.glType); // rlgl module function
ktxHeader.glBaseInternalFormat = ktxHeader.glFormat; // KTX 1.1 only
// NOTE: We can save into a .ktx all PixelFormats supported by raylib, including compressed formats like DXT, ETC or ASTC
if (ktxHeader.glFormat == -1) TraceLog(LOG_WARNING, "Image format not supported for KTX export.");
else
{
fwrite(&ktxHeader, 1, sizeof(KTXHeader), ktxFile);
int width = image.width;
int height = image.height;
int dataOffset = 0;
// Save all mipmaps data
for (int i = 0; i < image.mipmaps; i++)
{
unsigned int dataSize = GetPixelDataSize(width, height, image.format);
fwrite(&dataSize, 1, sizeof(unsigned int), ktxFile);
fwrite(image.data + dataOffset, 1, dataSize, ktxFile);
width /= 2;
height /= 2;
dataOffset += dataSize;
}
}
fclose(ktxFile); // Close file pointer
}
}
#endif
#if defined(SUPPORT_FILEFORMAT_PVR)