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More work towards paletted textures

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This commit is contained in:
Luke Benstead 2018-09-22 20:45:17 +01:00
parent e4f8cb8c9b
commit c84f211ad0
3 changed files with 74 additions and 30 deletions
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1
GL/private.h
View File

@ -65,6 +65,7 @@ typedef struct {
GLenum magFilter;
GLboolean isCompressed;
GLboolean isPaletted;
TexturePalette* palette;
} TextureObject;

102
GL/texture.c
View File

@ -143,6 +143,8 @@ void APIENTRY glGenTextures(GLsizei n, GLuint *textures) {
txr->minFilter = GL_NEAREST;
txr->magFilter = GL_NEAREST;
txr->palette = NULL;
txr->isCompressed = GL_FALSE;
txr->isPaletted = GL_FALSE;
*textures = id;
@ -168,6 +170,16 @@ void APIENTRY glDeleteTextures(GLsizei n, GLuint *textures) {
txr->data = NULL;
}
if(txr->palette && txr->palette->data) {
free(txr->palette->data);
txr->palette->data = NULL;
}
if(txr->palette) {
free(txr->palette);
txr->palette = NULL;
}
named_array_release(&TEXTURE_OBJECTS, *textures++);
}
}
@ -247,13 +259,13 @@ void APIENTRY glCompressedTexImage2DARB(GLenum target,
GLint w = width;
if(w < 8 || (w & -w) != w) {
/* Width is not a power of two. Must be!*/
_glKosThrowError(GL_INVALID_VALUE, "glTexImage2D");
_glKosThrowError(GL_INVALID_VALUE, __func__);
}
GLint h = height;
if(h < 8 || (h & -h) != h) {
/* Height is not a power of two. Must be!*/
_glKosThrowError(GL_INVALID_VALUE, "glTexImage2D");
_glKosThrowError(GL_INVALID_VALUE, __func__);
}
if(level || border) {
@ -334,6 +346,8 @@ void APIENTRY glCompressedTexImage2DARB(GLenum target,
static GLint _cleanInternalFormat(GLint internalFormat) {
switch (internalFormat) {
case GL_COLOR_INDEX8_EXT:
return GL_COLOR_INDEX8_EXT;
case GL_ALPHA:
/* case GL_ALPHA4:
case GL_ALPHA8:
@ -365,24 +379,24 @@ static GLint _cleanInternalFormat(GLint internalFormat) {
case 3:
return GL_RGB;
case GL_RGB:
/* case GL_R3_G3_B2:
/* case GL_R3_G3_B2: */
case GL_RGB4:
case GL_RGB5:
case GL_RGB8:
case GL_RGB10:
case GL_RGB12:
case GL_RGB16: */
case GL_RGB16:
return GL_RGB;
case 4:
return GL_RGBA;
case GL_RGBA:
/* case GL_RGBA2:
case GL_RGBA2:
case GL_RGBA4:
case GL_RGB5_A1:
case GL_RGBA8:
case GL_RGB10_A2:
case GL_RGBA12:
case GL_RGBA16: */
case GL_RGBA16:
return GL_RGBA;
/* Support ARB_texture_rg */
@ -452,19 +466,21 @@ static GLuint _determinePVRFormat(GLint internalFormat, GLenum type) {
case GL_COMPRESSED_ARGB_1555_VQ_TWID_KOS:
case GL_COMPRESSED_ARGB_1555_VQ_MIPMAP_TWID_KOS:
return PVR_TXRFMT_ARGB1555 | PVR_TXRFMT_TWIDDLED | PVR_TXRFMT_VQ_ENABLE;
case GL_COLOR_INDEX8_EXT:
return PVR_TXRFMT_PAL8BPP;
default:
return 0;
}
}
typedef void (*TextureConversionFunc)(const GLubyte*, GLushort*);
typedef void (*TextureConversionFunc)(const GLubyte*, GLubyte*);
static void _rgba8888_to_argb4444(const GLubyte* source, GLushort* dest) {
*dest = (source[3] & 0xF0) << 8 | (source[0] & 0xF0) << 4 | (source[1] & 0xF0) | (source[2] & 0xF0) >> 4;
static inline void _rgba8888_to_argb4444(const GLubyte* source, GLubyte* dest) {
*((GLushort*) dest) = (source[3] & 0xF0) << 8 | (source[0] & 0xF0) << 4 | (source[1] & 0xF0) | (source[2] & 0xF0) >> 4;
}
static void _rgba8888_to_rgba8888(const GLubyte* source, GLushort* dest) {
static inline void _rgba8888_to_rgba8888(const GLubyte* source, GLubyte* dest) {
/* Noop */
GLubyte* dst = (GLubyte*) dest;
dst[0] = source[0];
@ -473,7 +489,7 @@ static void _rgba8888_to_rgba8888(const GLubyte* source, GLushort* dest) {
dst[3] = source[3];
}
static void _rgb888_to_rgba8888(const GLubyte* source, GLushort* dest) {
static inline void _rgb888_to_rgba8888(const GLubyte* source, GLubyte* dest) {
/* Noop */
GLubyte* dst = (GLubyte*) dest;
dst[0] = source[0];
@ -482,31 +498,37 @@ static void _rgb888_to_rgba8888(const GLubyte* source, GLushort* dest) {
dst[3] = 255;
}
static void _rgb888_to_rgb565(const GLubyte* source, GLushort* dest) {
*dest = ((source[0] & 0b11111000) << 8) | ((source[1] & 0b11111100) << 3) | (source[2] >> 3);
static inline void _rgb888_to_rgb565(const GLubyte* source, GLubyte* dest) {
*((GLushort*) dest) = ((source[0] & 0b11111000) << 8) | ((source[1] & 0b11111100) << 3) | (source[2] >> 3);
}
static void _rgba8888_to_a000(const GLubyte* source, GLushort* dest) {
*dest = ((source[3] & 0b11111000) << 8);
static inline void _rgba8888_to_a000(const GLubyte* source, GLubyte* dest) {
*((GLushort*) dest) = ((source[3] & 0b11111000) << 8);
}
static void _r8_to_rgb565(const GLubyte* source, GLushort* dest) {
*dest = (source[0] & 0b11111000) << 8;
static inline void _r8_to_rgb565(const GLubyte* source, GLubyte* dest) {
*((GLushort*) dest) = (source[0] & 0b11111000) << 8;
}
static void _rgba4444_to_argb4444(const GLubyte* source, GLushort* dest) {
static inline void _rgba4444_to_argb4444(const GLubyte* source, GLubyte* dest) {
GLushort* src = (GLushort*) source;
*dest = ((*src & 0x000F) << 12) | *src >> 4;
*((GLushort*) dest) = ((*src & 0x000F) << 12) | *src >> 4;
}
static void _rgba4444_to_rgba8888(const GLubyte* source, GLushort* dest) {
static inline void _rgba4444_to_rgba8888(const GLubyte* source, GLubyte* dest) {
GLushort src = *((GLushort*) source);
GLubyte* dst = (GLubyte*) dest;
dst[0] = (src & 0xF000) * 2;
dst[1] = (src & 0x0F00) * 2;
dst[2] = (src & 0x00F0) * 2;
dst[3] = (src & 0x000F) * 2;
dst[0] = ((src & 0xF000) >> 12) * 2;
dst[1] = ((src & 0x0F00) >> 8) * 2;
dst[2] = ((src & 0x00F0) >> 4) * 2;
dst[3] = ((src & 0x000F)) * 2;
}
static inline void _i8_to_i8(const GLubyte* source, GLubyte* dest) {
/* For indexes */
GLubyte* dst = (GLubyte*) dest;
*dst = *source;
}
static TextureConversionFunc _determineConversion(GLint internalFormat, GLenum format, GLenum type) {
@ -555,6 +577,17 @@ static TextureConversionFunc _determineConversion(GLint internalFormat, GLenum f
return _rgba4444_to_rgba8888;
}
} break;
case GL_COLOR_INDEX8_EXT:
if(format == GL_COLOR_INDEX) {
switch(type) {
case GL_BYTE:
case GL_UNSIGNED_BYTE:
return _i8_to_i8;
default:
break;
}
}
break;
default:
fprintf(stderr, "Unsupported conversion: %x -> %x, %x\n", internalFormat, format, type);
break;
@ -568,6 +601,7 @@ static GLboolean _isSupportedFormat(GLenum format) {
case GL_RGB:
case GL_RGBA:
case GL_BGRA:
case GL_COLOR_INDEX:
return GL_TRUE;
default:
return GL_FALSE;
@ -661,7 +695,12 @@ void APIENTRY glTexImage2D(GLenum target, GLint level, GLint internalFormat,
}
}
GLuint bytes = (width * height * sizeof(GLushort));
/* All colour formats are represented as shorts internally. Paletted textures
* are represented by byte indexes (which look up into a color table)
*/
GLboolean isPaletted = (internalFormat == GL_COLOR_INDEX8_EXT) ? GL_TRUE : GL_FALSE;
GLint destStride = isPaletted ? 1 : 2;
GLuint bytes = (width * height * destStride);
if(!active->data) {
/* need texture memory */
@ -670,11 +709,12 @@ void APIENTRY glTexImage2D(GLenum target, GLint level, GLint internalFormat,
active->color = pvr_format;
/* Set the required mipmap count */
active->mipmapCount = _glGetMipmapLevelCount(active);
active->dataStride = sizeof(GLshort);
active->dataStride = destStride;
GLuint size = _glGetMipmapDataSize(active);
active->data = pvr_mem_malloc(size);
active->isCompressed = GL_FALSE;
active->isPaletted = isPaletted;
}
/* Mark this level as set in the mipmap bitmask */
@ -722,7 +762,7 @@ void APIENTRY glTexImage2D(GLenum target, GLint level, GLint internalFormat,
return;
}
GLushort* dest = (GLushort*) targetData;
GLubyte* dest = (GLubyte*) targetData;
const GLubyte* source = data;
GLint stride = _determineStride(format, type);
@ -734,10 +774,10 @@ void APIENTRY glTexImage2D(GLenum target, GLint level, GLint internalFormat,
/* Perform the conversion */
GLuint i;
for(i = 0; i < bytes; i += 2) {
for(i = 0; i < bytes; i += destStride) {
convert(source, dest);
dest++;
dest += destStride;
source += stride;
}
}
@ -865,6 +905,8 @@ GLAPI void APIENTRY glColorTableEXT(GLenum target, GLenum internalFormat, GLsize
}
active->palette->data = (GLubyte*) malloc(width * 4);
active->palette->format = format;
active->palette->width = width;
GLubyte* src = (GLubyte*) data;
GLubyte* dst = (GLubyte*) active->palette->data;
@ -872,7 +914,7 @@ GLAPI void APIENTRY glColorTableEXT(GLenum target, GLenum internalFormat, GLsize
/* Transform and copy the source palette to the texture */
GLushort i = 0;
for(; i < width; ++i) {
convert(src, (GLushort*) dst);
convert(src, dst);
src += sourceStride;
dst += 4;

1
include/gl.h
View File

@ -339,6 +339,7 @@ __BEGIN_DECLS
#define GL_UNSIGNED_SHORT_4_4_4_4_REV 0x8365
#define GL_UNSIGNED_SHORT_1_5_5_5_REV 0x8366
#define GL_COLOR_INDEX 0x1900
#define GL_RED 0x1903
#define GL_GREEN 0x1904
#define GL_BLUE 0x1905