Add nehe06_dt Dreamcast texture sample
Add a Dreamcast GLdc sample that loads a .dt texture from romdisk. This adds a new nehe06_dt sample based on the existing NeHe cube demo, but loading a Dreamcast .dt texture directly from romdisk instead of the older texture formats. Changes: - add samples/nehe06_dt/main.c - add samples/nehe06_dt/romdisk/NeHe.dt - register the sample in CMakeLists.txt The sample is useful for checking GLdc texture loading with Dreamcast-native .dt assets and for comparing the output against the source artwork on hardware.
This commit is contained in:
GPF
Troy Davis
parent
2da4f94b9a
commit
0d1179808f
@ -202,6 +202,7 @@ if(BUILD_SAMPLES)
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gen_sample(nehe05 samples/nehe05/main.c)
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gen_sample(nehe06 samples/nehe06/main.c samples/loadbmp.c)
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gen_sample(nehe06_vq samples/nehe06_vq/main.c)
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gen_sample(nehe06_dt samples/nehe06_dt/main.c)
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gen_sample(nehe06_4444twid samples/nehe06_4444twid/main.c)
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gen_sample(nehe08 samples/nehe08/main.c samples/nehe08/pvr-texture.c)
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gen_sample(nehe10 samples/nehe10/main.c samples/loadbmp.c)
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339
samples/nehe06_dt/main.c
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339
samples/nehe06_dt/main.c
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@ -0,0 +1,339 @@
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#include <stdint.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#ifdef _arch_dreamcast
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#include <kos.h>
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#endif
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#include "GL/gl.h"
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#include "GL/glu.h"
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#include "GL/glkos.h"
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#include "GL/glext.h"
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#ifdef _arch_dreamcast
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extern uint8 romdisk[];
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KOS_INIT_ROMDISK(romdisk);
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// /opt/toolchains/dc/kos/utils/pvrtex/pvrtex -i romdisk/NeHe.bmp -f rgb565 -c -o romdisk/NeHe.dt
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#define IMG_PATH "/rd/NeHe.dt"
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#else
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#define IMG_PATH "../samples/nehe06_dt/romdisk/NeHe.dt"
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#endif
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/* floats for x rotation, y rotation, z rotation */
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float xrot, yrot, zrot;
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/* storage for one texture */
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GLuint texture[1];
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typedef struct __attribute__((packed)) DcTxHeader {
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char fourcc[4];
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uint32_t chunk_size;
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uint8_t version;
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uint8_t header_size;
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uint8_t codebook_size;
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uint8_t colors_used;
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uint16_t width_pixels;
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uint16_t height_pixels;
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uint32_t pvr_type;
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uint32_t pad1;
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uint32_t pad2;
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uint32_t pad3;
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} DcTxHeader;
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typedef struct Image {
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unsigned long sizeX;
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unsigned long sizeY;
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void *buffer;
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void *data;
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GLenum format;
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GLenum internal_format;
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GLenum type;
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GLboolean compressed;
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unsigned int dataSize;
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} Image;
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static int ImageLoad(const char *filename, Image *image) {
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FILE *file = NULL;
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long file_size;
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DcTxHeader *header;
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size_t header_size;
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file = fopen(filename, "rb");
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if(!file) {
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printf("File Not Found : %s\n", filename);
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return 0;
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}
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if(fseek(file, 0, SEEK_END) != 0) {
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fclose(file);
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return 0;
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}
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file_size = ftell(file);
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if(file_size <= 0) {
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fclose(file);
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return 0;
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}
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rewind(file);
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image->buffer = malloc((size_t)file_size);
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if(!image->buffer) {
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fclose(file);
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return 0;
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}
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if(fread(image->buffer, (size_t)file_size, 1, file) != 1) {
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fclose(file);
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free(image->buffer);
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image->buffer = NULL;
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return 0;
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}
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fclose(file);
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if((size_t)file_size < sizeof(DcTxHeader)) {
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free(image->buffer);
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image->buffer = NULL;
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return 0;
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}
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header = (DcTxHeader *)image->buffer;
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if(memcmp(header->fourcc, "DcTx", 4) != 0) {
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printf("Invalid .dt file header: %s\n", filename);
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free(image->buffer);
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image->buffer = NULL;
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return 0;
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}
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header_size = (size_t)(header->header_size + 1) * 32;
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if(header_size > (size_t)file_size || header->chunk_size > (uint32_t)file_size) {
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printf("Invalid .dt file size: %s\n", filename);
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free(image->buffer);
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image->buffer = NULL;
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return 0;
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}
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image->sizeX = header->width_pixels;
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image->sizeY = header->height_pixels;
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image->data = (void *)((uint8_t *)image->buffer + header_size);
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image->dataSize = (unsigned int)(header->chunk_size - header_size);
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image->compressed = (header->pvr_type & (1u << 30)) != 0;
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{
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GLboolean twiddled = ((header->pvr_type & (1u << 26)) == 0);
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GLboolean mipmapped = ((int32_t)header->pvr_type) < 0;
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GLuint format = (header->pvr_type >> 27) & 0x7;
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if(image->compressed) {
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switch(format) {
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case 0:
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image->internal_format = mipmapped
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? (twiddled ? GL_COMPRESSED_ARGB_1555_VQ_MIPMAP_TWID_KOS : GL_COMPRESSED_ARGB_1555_VQ_MIPMAP_KOS)
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: (twiddled ? GL_COMPRESSED_ARGB_1555_VQ_TWID_KOS : GL_COMPRESSED_ARGB_1555_VQ_KOS);
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break;
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case 1:
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image->internal_format = mipmapped
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? (twiddled ? GL_COMPRESSED_RGB_565_VQ_MIPMAP_TWID_KOS : GL_COMPRESSED_RGB_565_VQ_MIPMAP_KOS)
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: (twiddled ? GL_COMPRESSED_RGB_565_VQ_TWID_KOS : GL_COMPRESSED_RGB_565_VQ_KOS);
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break;
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case 2:
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image->internal_format = mipmapped
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? (twiddled ? GL_COMPRESSED_ARGB_4444_VQ_MIPMAP_TWID_KOS : GL_COMPRESSED_ARGB_4444_VQ_MIPMAP_KOS)
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: (twiddled ? GL_COMPRESSED_ARGB_4444_VQ_TWID_KOS : GL_COMPRESSED_ARGB_4444_VQ_KOS);
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break;
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default:
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printf("Unsupported compressed texture format in .dt: %u\n", format);
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free(image->buffer);
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image->buffer = NULL;
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return 0;
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}
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} else {
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switch(format) {
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case 0:
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image->format = GL_BGRA;
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image->internal_format = GL_RGBA;
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image->type = twiddled ? GL_UNSIGNED_SHORT_1_5_5_5_REV_TWID_KOS : GL_UNSIGNED_SHORT_1_5_5_5_REV;
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break;
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case 1:
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image->format = GL_RGB;
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image->internal_format = GL_RGB;
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image->type = twiddled ? GL_UNSIGNED_SHORT_5_6_5_TWID_KOS : GL_UNSIGNED_SHORT_5_6_5;
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break;
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case 2:
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image->format = GL_BGRA;
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image->internal_format = GL_RGBA;
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image->type = twiddled ? GL_UNSIGNED_SHORT_4_4_4_4_REV_TWID_KOS : GL_UNSIGNED_SHORT_4_4_4_4_REV;
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break;
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default:
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printf("Unsupported uncompressed texture format in .dt: %u\n", format);
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free(image->buffer);
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image->buffer = NULL;
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return 0;
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}
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}
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}
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return 1;
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}
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/* Load texture from a .dt file */
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static void LoadGLTextures(void) {
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Image *image1;
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image1 = (Image *)malloc(sizeof(Image));
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if(image1 == NULL) {
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printf("Error allocating space for image\n");
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exit(0);
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}
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memset(image1, 0, sizeof(*image1));
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if(!ImageLoad(IMG_PATH, image1)) {
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free(image1);
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exit(1);
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}
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glGenTextures(1, &texture[0]);
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glBindTexture(GL_TEXTURE_2D, texture[0]);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
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if(image1->compressed) {
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glCompressedTexImage2DARB(
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GL_TEXTURE_2D, 0, image1->internal_format, image1->sizeX, image1->sizeY, 0,
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image1->dataSize, image1->data
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);
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} else {
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glTexImage2D(
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GL_TEXTURE_2D, 0, image1->internal_format, image1->sizeX, image1->sizeY, 0,
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image1->format, image1->type, image1->data
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);
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}
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free(image1->buffer);
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free(image1);
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}
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/* A general OpenGL initialization function. */
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static void InitGL(int Width, int Height) {
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LoadGLTextures();
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glEnable(GL_TEXTURE_2D);
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glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
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glClearDepth(1.0);
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glDepthFunc(GL_LESS);
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glEnable(GL_DEPTH_TEST);
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glShadeModel(GL_SMOOTH);
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glMatrixMode(GL_PROJECTION);
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glLoadIdentity();
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gluPerspective(45.0f, (GLfloat)Width / (GLfloat)Height, 0.1f, 100.0f);
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glMatrixMode(GL_MODELVIEW);
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}
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/* The function called when our window is resized. */
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static void ReSizeGLScene(int Width, int Height) {
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if(Height == 0)
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Height = 1;
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glViewport(0, 0, Width, Height);
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glMatrixMode(GL_PROJECTION);
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glLoadIdentity();
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gluPerspective(45.0f, (GLfloat)Width / (GLfloat)Height, 0.1f, 100.0f);
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glMatrixMode(GL_MODELVIEW);
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}
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static int check_start(void) {
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#ifdef _arch_dreamcast
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maple_device_t *cont;
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cont_state_t *state;
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cont = maple_enum_type(0, MAPLE_FUNC_CONTROLLER);
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if(cont) {
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state = (cont_state_t *)maple_dev_status(cont);
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if(state)
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return state->buttons & CONT_START;
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}
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#endif
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return 0;
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}
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/* The main drawing function. */
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static void DrawGLScene(void) {
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glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
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glLoadIdentity();
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glTranslatef(0.0f, 0.0f, -5.0f);
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glRotatef(xrot, 1.0f, 0.0f, 0.0f);
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glRotatef(yrot, 0.0f, 1.0f, 0.0f);
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glRotatef(zrot, 0.0f, 0.0f, 1.0f);
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glBindTexture(GL_TEXTURE_2D, texture[0]);
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glBegin(GL_QUADS);
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glTexCoord2f(0.0f, 0.0f); glVertex3f(-1.0f, -1.0f, 1.0f);
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glTexCoord2f(1.0f, 0.0f); glVertex3f( 1.0f, -1.0f, 1.0f);
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glTexCoord2f(1.0f, 1.0f); glVertex3f( 1.0f, 1.0f, 1.0f);
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glTexCoord2f(0.0f, 1.0f); glVertex3f(-1.0f, 1.0f, 1.0f);
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glTexCoord2f(1.0f, 0.0f); glVertex3f(-1.0f, -1.0f, -1.0f);
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glTexCoord2f(1.0f, 1.0f); glVertex3f(-1.0f, 1.0f, -1.0f);
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glTexCoord2f(0.0f, 1.0f); glVertex3f( 1.0f, 1.0f, -1.0f);
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glTexCoord2f(0.0f, 0.0f); glVertex3f( 1.0f, -1.0f, -1.0f);
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glTexCoord2f(0.0f, 1.0f); glVertex3f(-1.0f, 1.0f, -1.0f);
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glTexCoord2f(0.0f, 0.0f); glVertex3f(-1.0f, 1.0f, 1.0f);
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glTexCoord2f(1.0f, 0.0f); glVertex3f( 1.0f, 1.0f, 1.0f);
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glTexCoord2f(1.0f, 1.0f); glVertex3f( 1.0f, 1.0f, -1.0f);
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glTexCoord2f(1.0f, 1.0f); glVertex3f(-1.0f, -1.0f, -1.0f);
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glTexCoord2f(0.0f, 1.0f); glVertex3f( 1.0f, -1.0f, -1.0f);
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glTexCoord2f(0.0f, 0.0f); glVertex3f( 1.0f, -1.0f, 1.0f);
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glTexCoord2f(1.0f, 0.0f); glVertex3f(-1.0f, -1.0f, 1.0f);
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glTexCoord2f(1.0f, 0.0f); glVertex3f( 1.0f, -1.0f, -1.0f);
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glTexCoord2f(1.0f, 1.0f); glVertex3f( 1.0f, 1.0f, -1.0f);
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glTexCoord2f(0.0f, 1.0f); glVertex3f( 1.0f, 1.0f, 1.0f);
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glTexCoord2f(0.0f, 0.0f); glVertex3f( 1.0f, -1.0f, 1.0f);
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glTexCoord2f(0.0f, 0.0f); glVertex3f(-1.0f, -1.0f, -1.0f);
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glTexCoord2f(1.0f, 0.0f); glVertex3f(-1.0f, -1.0f, 1.0f);
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glTexCoord2f(1.0f, 1.0f); glVertex3f(-1.0f, 1.0f, 1.0f);
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glTexCoord2f(0.0f, 1.0f); glVertex3f(-1.0f, 1.0f, -1.0f);
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glEnd();
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xrot += 1.5f;
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yrot += 1.5f;
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zrot += 1.5f;
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glKosSwapBuffers();
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}
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int main(int argc, char **argv) {
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(void)argc;
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(void)argv;
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glKosInit();
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InitGL(640, 480);
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ReSizeGLScene(640, 480);
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while(1) {
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if(check_start())
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break;
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DrawGLScene();
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}
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return 0;
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}
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BIN
samples/nehe06_dt/romdisk/NeHe.dt
Normal file
BIN
samples/nehe06_dt/romdisk/NeHe.dt
Normal file
Binary file not shown.
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