#include <GL/glew.h>
#include <GL/glut.h>
#include <stdio.h>
#include <stdlib.h>
#include <assert.h>
#include <sys/time.h>

Include dependency graph for dxt_common.h:

This graph shows which files directly or indirectly include this file:

Go to the source code of this file.

Macros
#define	DXT_COMPRESS_STANDALONE

#define	DXT_IMAGE_GL_FORMAT GL_RGBA

#define	DXT_IMAGE_GL_TYPE GL_UNSIGNED_INT_8_8_8_8_REV

#define	DXT_IMAGE_TYPE unsigned char

#define	TIMER_DURATION()

#define	TIMER_INIT()

#define	TIMER_START()

#define	TIMER_STOP()

#define	TIMER_STOP_PRINT(text)

Enumerations
enum	dxt_format { DXT_FORMAT_RGB , DXT_FORMAT_RGBA , DXT_FORMAT_YUV , DXT_FORMAT_YUV422 }

enum	dxt_type { DXT_TYPE_DXT1 , DXT_TYPE_DXT1_YUV , DXT_TYPE_DXT5_YCOCG }

Functions
int	dxt_image_compressed_destroy (unsigned char *image_compressed)

int	dxt_image_compressed_load_from_file (const char filename, unsigned char data, int data_size)

int	dxt_image_compressed_save_to_file (const char filename, unsigned char image, int image_size)

int	dxt_image_destroy (DXT_IMAGE_TYPE *image)

int	dxt_image_load_from_file (const char filename, int width, int height, DXT_IMAGE_TYPE *image)

int	dxt_image_save_to_file (const char filename, DXT_IMAGE_TYPE image, int width, int height)

int	dxt_init ()

Macro Definition Documentation

◆ DXT_COMPRESS_STANDALONE

#define DXT_COMPRESS_STANDALONE

Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:

* Redistributions of source code must retain the above copyright
  notice, this list of conditions and the following disclaimer.
* Redistributions in binary form must reproduce the above copyright
  notice, this list of conditions and the following disclaimer in the
  documentation and/or other materials provided with the distribution.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

Definition at line 35 of file dxt_common.h.

◆ DXT_IMAGE_GL_FORMAT

#define DXT_IMAGE_GL_FORMAT GL_RGBA

Definition at line 73 of file dxt_common.h.

Referenced by dxt_decoder_create(), dxt_display_image(), and dxt_display_image_comparison().

◆ DXT_IMAGE_GL_TYPE

#define DXT_IMAGE_GL_TYPE GL_UNSIGNED_INT_8_8_8_8_REV

Definition at line 72 of file dxt_common.h.

Referenced by dxt_decoder_create(), dxt_decoder_decompress(), dxt_display_image(), dxt_display_image_comparison(), and dxt_encoder_compress().

◆ DXT_IMAGE_TYPE

#define DXT_IMAGE_TYPE unsigned char

Image type

Definition at line 71 of file dxt_common.h.

Referenced by dxt_decoder_buffer_allocate(), dxt_image_load_from_file(), main(), perform_comparison(), perform_decode(), perform_display(), and perform_encode().

◆ TIMER_DURATION

#define TIMER_DURATION ( )

Value:

__elapsedTime

Definition at line 63 of file dxt_common.h.

Referenced by perform_decode(), and perform_encode().

◆ TIMER_INIT

#define TIMER_INIT ( )

Value:

    struct timeval __start, __stop; \
    long __seconds, __useconds; \
    float __elapsedTime;

Timer

Definition at line 52 of file dxt_common.h.

#define TIMER_INIT() \
    struct timeval __start, __stop; \
    long __seconds, __useconds; \
    float __elapsedTime;

Referenced by dxt_decoder_decompress(), dxt_encoder_compress(), perform_decode(), and perform_encode().

◆ TIMER_START

#define TIMER_START ( )

Value:

gettimeofday(&__start, NULL);

Definition at line 56 of file dxt_common.h.

56#define TIMER_START() \

57 gettimeofday(&__start, NULL);

Referenced by dxt_decoder_decompress(), dxt_encoder_compress(), dxt_encoder_compress_texture(), perform_decode(), and perform_encode().

◆ TIMER_STOP

#define TIMER_STOP ( )

Value:

    gettimeofday(&__stop, NULL); \
    __seconds  = __stop.tv_sec  - __start.tv_sec; \
    __useconds = __stop.tv_usec - __start.tv_usec; \
    __elapsedTime = ((__seconds) * 1000.0 + __useconds/1000.0) + 0.5;

Definition at line 58 of file dxt_common.h.

#define TIMER_STOP() \
    gettimeofday(&__stop, NULL); \
    __seconds  = __stop.tv_sec  - __start.tv_sec; \
    __useconds = __stop.tv_usec - __start.tv_usec; \
    __elapsedTime = ((__seconds) * 1000.0 + __useconds/1000.0) + 0.5;

Referenced by perform_decode(), and perform_encode().

◆ TIMER_STOP_PRINT

#define TIMER_STOP_PRINT ( text )

Value:

TIMER_STOP(); \

printf("%s %f ms\n", text, __elapsedTime)

TIMER_STOP

#define TIMER_STOP()

Definition dxt_common.h:58

Definition at line 64 of file dxt_common.h.

#define TIMER_STOP_PRINT(text) \
    TIMER_STOP(); \
    printf("%s %f ms\n", text, __elapsedTime)

Referenced by dxt_decoder_decompress(), dxt_encoder_compress(), and dxt_encoder_compress_texture().

Enumeration Type Documentation

◆ dxt_format

enum dxt_format

DXT format

Enumerator
DXT_FORMAT_RGB
DXT_FORMAT_RGBA
DXT_FORMAT_YUV
DXT_FORMAT_YUV422

Definition at line 78 of file dxt_common.h.

                {
    DXT_FORMAT_RGB,
    DXT_FORMAT_RGBA,
    DXT_FORMAT_YUV,
    DXT_FORMAT_YUV422
};

◆ dxt_type

enum dxt_type

DXT type

Enumerator
DXT_TYPE_DXT1
DXT_TYPE_DXT1_YUV
DXT_TYPE_DXT5_YCOCG

Definition at line 88 of file dxt_common.h.

              {
    DXT_TYPE_DXT1,
    DXT_TYPE_DXT1_YUV,
    DXT_TYPE_DXT5_YCOCG
};

Function Documentation

◆ dxt_image_compressed_destroy()

int dxt_image_compressed_destroy ( unsigned char * image_compressed )

Destroy DXT compressed image

Parameters

image_compressed Compressed image data buffer

Documented at declaration

Definition at line 206 of file dxt_common.c.

{
    free(image_compressed);
 
    return 0;
}

Referenced by perform_comparison(), perform_decode(), and perform_display().

◆ dxt_image_compressed_load_from_file()

int dxt_image_compressed_load_from_file	(	const char *	filename,
		unsigned char **	data,
		int *	data_size )

Load compressed image from file

Parameters

filaname	Image filename
width	Image width in pixels
height	Image height in pixels

Returns: 0 if succeeds, otherwise nonzero

Documented at declaration

Definition at line 145 of file dxt_common.c.

{
    FILE* file;
        file = fopen(filename, "rb");
        if ( !file ) {
                fprintf(stderr, "Failed open %s for reading!\n", filename);
                return -1;
        }
 
    fseek(file, 0, SEEK_END);
    *data_size = ftell(file);
    rewind(file);
    *data = (unsigned char*)malloc(*data_size * sizeof(unsigned char));
    if ( (size_t) *data_size != fread(*data, sizeof(unsigned char), *data_size, file) ) {
        fprintf(stderr, "Failed to load image data [%d bytes] from file %s!\n", *data_size, filename);
        return -1;
    }
    fclose(file);
    
#ifdef DEBUG
    printf("Load Compressed Image [file: %s, size: %d bytes]\n", filename, *data_size);
#endif
    
    return 0;
}

Referenced by perform_comparison(), perform_decode(), and perform_display().

◆ dxt_image_compressed_save_to_file()

int dxt_image_compressed_save_to_file	(	const char *	filename,
		unsigned char *	image,
		int	image_size )

Save compressed image to file

Parameters

filename	Image filename
image	Image data
image_size	Image data size

Returns: 0 if succeeds, otherwise nonzero

Documented at declaration

Definition at line 173 of file dxt_common.c.

{
    FILE* file;
        file = fopen(filename, "wb");
        if ( !file ) {
                fprintf(stderr, "Failed open %s for writing!\n", filename);
                return -1;
        }
    
    if ( (size_t) image_size != fwrite(image, sizeof(unsigned char), image_size, file) ) {
        fprintf(stderr, "Failed to write image data [%d bytes] to file %s!\n", image_size, filename);
        return -1;
    }
    fclose(file);
    
#ifdef DEBUG
    printf("Save Compressed Image [file: %s, size: %d bytes]\n", filename, image_size);
#endif
    
    return 0;
}

Referenced by main(), and perform_encode().

◆ dxt_image_destroy()

int dxt_image_destroy ( DXT_IMAGE_TYPE * image )

Destroy DXT image

Parameters

image Image data buffer

Documented at declaration

Definition at line 197 of file dxt_common.c.

{
    free(image);
 
    return 0;
}

Referenced by main(), perform_comparison(), perform_display(), and perform_encode().

◆ dxt_image_load_from_file()

int dxt_image_load_from_file	(	const char *	filename,
		int	width,
		int	height,
		DXT_IMAGE_TYPE **	image )

Load RGB image from file

Parameters

filaname	Image filename
width	Image width in pixels
height	Image height in pixels

Returns: image data buffer or zero if fails

Documented at declaration

Definition at line 67 of file dxt_common.c.

{
    FILE* file;
        file = fopen(filename, "rb");
        if ( !file ) {
                fprintf(stderr, "Failed open %s for reading!\n", filename);
                return -1;
        }
 
    int data_size = width * height * 3;
    unsigned char* data = (unsigned char*)malloc(data_size * sizeof(unsigned char));
    if ( (size_t) data_size != fread(data, sizeof(unsigned char), data_size, file) ) {
        fprintf(stderr, "Failed to load image data [%d bytes] from file %s!\n", data_size, filename);
        return -1;
    }
    fclose(file);
    
    *image = (DXT_IMAGE_TYPE*)malloc(width * height * 4 * sizeof(DXT_IMAGE_TYPE));
    for ( int y = 0; y < height; y++ ) {
        for ( int x = 0; x < width; x++ ) {
            int index = 4 * ((y * width) + x);
            int index_data = 3 * ((y * width) + x);
            (*image)[index + 0] = (DXT_IMAGE_TYPE)data[index_data + 0];
            (*image)[index + 1] = (DXT_IMAGE_TYPE)data[index_data + 1];
            (*image)[index + 2] = (DXT_IMAGE_TYPE)data[index_data + 2];
            (*image)[index + 3] = 1.0;
        }
    }
 
    free(data);
    
#ifdef DEBUG
    printf("Load Image [file: %s, size: %d bytes, resolution: %dx%d]\n", filename, data_size, width, height);
#endif
    
    return 0;
}

References DXT_IMAGE_TYPE.

Referenced by main(), perform_comparison(), perform_display(), and perform_encode().

◆ dxt_image_save_to_file()

int dxt_image_save_to_file	(	const char *	filename,
		DXT_IMAGE_TYPE *	image,
		int	width,
		int	height )

Load RGB image from file

Parameters

filaname	Image filename
width	Image width in pixels
height	Image height in pixels

Returns: image data buffer or zero if fails

Documented at declaration

Definition at line 107 of file dxt_common.c.

{
    FILE* file;
        file = fopen(filename, "wb");
        if ( !file ) {
                fprintf(stderr, "Failed open %s for writing!\n", filename);
                return -1;
        }
    
    int data_size = width * height * 3;
    unsigned char* data = (unsigned char*)malloc(data_size * sizeof(unsigned char));
    for ( int y = 0; y < height; y++ ) {
        for ( int x = 0; x < width; x++ ) {
            int index = 4 * ((y * width) + x);
            int index_data = 3 * ((y * width) + x);
            data[index_data + 0] = (unsigned char)(image[index + 0]);
            data[index_data + 1] = (unsigned char)(image[index + 1]);
            data[index_data + 2] = (unsigned char)(image[index + 2]);
        }
    }
    
    if ( (size_t) data_size != fwrite(data, sizeof(unsigned char), data_size, file) ) {
        fprintf(stderr, "Failed to write image data [%d bytes] to file %s!\n", width * height * 3, filename);
        free(data);
        return -1;
    }
    free(data);
    fclose(file);
 
#ifdef DEBUG
    printf("Save Image [file: %s, size: %d bytes, resolution: %dx%d]\n", filename, data_size, width, height);
#endif
    
    return 0;
}

Referenced by perform_decode().

◆ dxt_init()

int dxt_init ( )

Initialize DXT

Returns: 0 if succeeds, otherwise nonzero

Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:

* Redistributions of source code must retain the above copyright
  notice, this list of conditions and the following disclaimer.
* Redistributions in binary form must reproduce the above copyright
  notice, this list of conditions and the following disclaimer in the
  documentation and/or other materials provided with the distribution.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. Documented at declaration

Definition at line 32 of file dxt_common.c.

{
    int argc = 0;
    glutInit(&argc, NULL);
    glutInitDisplayMode(GLUT_RGBA | GLUT_DOUBLE);
    glutCreateWindow("DXT"); 
    glutHideWindow();
    glewInit();
        
    int result = 0;
    
#define CHECK_EXTENSION(extension) \
    if ( !glewIsSupported(extension) ) { \
        fprintf(stderr, "OpenGL extension '%s' is missing!\n", extension); \
        result = -1; \
    } \
    
    CHECK_EXTENSION("GL_VERSION_2_0");
    CHECK_EXTENSION("GL_ARB_vertex_program");
    CHECK_EXTENSION("GL_ARB_fragment_program");
    CHECK_EXTENSION("GL_EXT_gpu_shader4");
    CHECK_EXTENSION("GL_EXT_framebuffer_object");
    CHECK_EXTENSION("GL_ARB_texture_compression");
    CHECK_EXTENSION("GL_EXT_texture_compression_s3tc");
    CHECK_EXTENSION("GL_EXT_texture_integer");
    
    printf("Graphic Card:   %s\n", glGetString(GL_RENDERER));
    printf("OpenGL version: %s\n", glGetString(GL_VERSION));
    printf("GLSL version:   %s\n", glGetString(GL_SHADING_LANGUAGE_VERSION));
    
    return result;
}

References CHECK_EXTENSION.

Referenced by main().

Macros

Enumerations

Functions

Macro Definition Documentation

◆ DXT_COMPRESS_STANDALONE

◆ DXT_IMAGE_GL_FORMAT

◆ DXT_IMAGE_GL_TYPE

◆ DXT_IMAGE_TYPE

◆ TIMER_DURATION

◆ TIMER_INIT

◆ TIMER_START

◆ TIMER_STOP

◆ TIMER_STOP_PRINT

Enumeration Type Documentation

◆ dxt_format

◆ dxt_type

Function Documentation

◆ dxt_image_compressed_destroy()

◆ dxt_image_compressed_load_from_file()

◆ dxt_image_compressed_save_to_file()

◆ dxt_image_destroy()

◆ dxt_image_load_from_file()

◆ dxt_image_save_to_file()

◆ dxt_init()