49f2f0917b
Newest toolchain is bitchier, so I wanted to go ahead and clear up all of the warnings from building GLdc and the various examples... 1) Set CMake CXX standard to 14 instead of 11, since CXXFLAGS were enforcing that language standard anyway. 2) Fixed a bunch of strict aliasing violations in immediate.c: glVertex3f. 3) Removed or commented out lots of unused variables. 4) Fixed some "suggested inner braces on initializer" crap. 5) Fixed a bunch of signed vs unsigned pointer assignments. 6) Fixed several printf() warnings from using %d with int32_t (needs to be %ld for long int). 7) Fixed build issue with Nehe20 from not including kos.h for the KOS_ROMDISK macro. 8) Fixed some signed vs unsigned comparison mismatches in C++ template instantiations within clipping tests. 9)
270 lines
8.8 KiB
C
270 lines
8.8 KiB
C
#include <stdio.h>
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#include <string.h>
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#include <stdlib.h>
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#include <stdint.h>
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#ifdef __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/glext.h"
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#include "GL/glu.h"
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#include "GL/glkos.h"
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#ifdef __DREAMCAST__
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extern uint8_t romdisk[];
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KOS_INIT_ROMDISK(romdisk);
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#define IMG_PATH "/rd/NeHe.tex"
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#else
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#define IMG_PATH "../samples/paletted/romdisk/NeHe.tex"
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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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GLuint texture[1];
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typedef struct {
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unsigned int height;
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unsigned int width;
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unsigned int palette_width;
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char* palette;
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char* data;
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} Image;
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int LoadPalettedTex(const char* filename, Image* image) {
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struct {
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char id[4]; // 'DTEX'
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short width;
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short height;
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int type;
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int size;
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} header;
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FILE* filein = NULL;
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filein = fopen(filename, "rb");
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if(!filein) {
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printf("Unable to open file\n");
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return 0;
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}
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fread(&header, sizeof(header), 1, filein);
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if((header.type & (7 << 27)) >> 27 != 6) {
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printf("Not PAL8BPP format\n");
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return 0;
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}
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image->width = header.width;
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image->height = header.height;
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image->data = (char*) malloc(sizeof(char) * header.size);
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fread(image->data, header.size, sizeof(char), filein);
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fclose(filein);
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char palette_filename[100];
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strcpy(palette_filename, filename);
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strcat(palette_filename, ".pal");
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filein = fopen(palette_filename, "rb");
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if(!filename) {
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printf("Unable to open the palette file\n");
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return 0;
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}
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struct {
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char id[4];
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int numcolors;
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} palette_header;
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fread(&palette_header, sizeof(palette_header), 1, filein);
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image->palette = (char*) malloc(sizeof(unsigned int) * palette_header.numcolors);
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image->palette_width = palette_header.numcolors;
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fread(image->palette, sizeof(unsigned int), palette_header.numcolors, filein);
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unsigned int i = 0;
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for(; i < palette_header.numcolors; ++i) {
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unsigned int* p = (unsigned int*) image->palette;
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// Swap the colours around from ARGB to RGBA
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char r = (p[i] & 0x00FF0000) >> 16;
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char g = (p[i] & 0x0000FF00) >> 8;
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char b = (p[i] & 0x000000FF);
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char a = (p[i] & 0xFF000000) >> 24;
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image->palette[i * 4] = r;
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image->palette[i * 4 + 1] = g;
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image->palette[i * 4 + 2] = b;
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image->palette[i * 4 + 3] = a;
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}
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return 1;
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}
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// Load Bitmaps And Convert To Textures
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void LoadGLTextures() {
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// Load Texture
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Image *image1;
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// allocate space for texture
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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");
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exit(0);
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}
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if (!LoadPalettedTex(IMG_PATH, image1)) {
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exit(1);
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}
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glEnable(GL_SHARED_TEXTURE_PALETTE_EXT);
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glColorTableEXT(GL_SHARED_TEXTURE_PALETTE_EXT, GL_RGBA8, image1->palette_width, GL_RGBA, GL_UNSIGNED_BYTE, image1->palette);
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// Create Texture
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glGenTextures(1, &texture[0]);
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glBindTexture(GL_TEXTURE_2D, texture[0]); // 2d texture (x and y size)
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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_MIPMAP_LINEAR);
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// 2d texture, level of detail 0 (normal), 3 components (red, green, blue), x size from image, y size from image,
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// border 0 (normal), rgb color data, unsigned byte data, and finally the data itself.
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glTexImage2D(GL_TEXTURE_2D, 0, GL_COLOR_INDEX8_EXT, image1->width, image1->height, 0, GL_COLOR_INDEX8_TWID_KOS, GL_UNSIGNED_BYTE, image1->data);
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glGenerateMipmapEXT(GL_TEXTURE_2D);
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free(image1);
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}
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/* A general OpenGL initialization function. Sets all of the initial parameters. */
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void InitGL(int Width, int Height) // We call this right after our OpenGL window is created.
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{
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LoadGLTextures();
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glEnable(GL_TEXTURE_2D);
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glClearColor(0.5f, 0.5f, 0.5f, 1.0f);
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glClearDepth(1.0); // Enables Clearing Of The Depth Buffer
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glDepthFunc(GL_LESS); // The Type Of Depth Test To Do
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glEnable(GL_DEPTH_TEST); // Enables Depth Testing
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glShadeModel(GL_SMOOTH); // Enables Smooth Color Shading
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glMatrixMode(GL_PROJECTION);
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glLoadIdentity(); // Reset The Projection Matrix
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gluPerspective(45.0f,(GLfloat)Width/(GLfloat)Height,0.1f,100.0f); // Calculate The Aspect Ratio Of The Window
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glMatrixMode(GL_MODELVIEW);
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}
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/* The function called when our window is resized (which shouldn't happen, because we're fullscreen) */
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void ReSizeGLScene(int Width, int Height)
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{
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if (Height == 0) // Prevent A Divide By Zero If The Window Is Too Small
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Height = 1;
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glViewport(0, 0, Width, Height); // Reset The Current Viewport And Perspective Transformation
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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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int check_start() {
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#ifdef __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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void DrawGLScene()
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{
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glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); // Clear The Screen And The Depth Buffer
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glLoadIdentity(); // Reset The View
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glTranslatef(0.0f,0.0f,-5.0f); // move 5 units into the screen.
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glRotatef(xrot,1.0f,0.0f,0.0f); // Rotate On The X Axis
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glRotatef(yrot,0.0f,1.0f,0.0f); // Rotate On The Y Axis
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glRotatef(zrot,0.0f,0.0f,1.0f); // Rotate On The Z Axis
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glBindTexture(GL_TEXTURE_2D, texture[0]); // choose the texture to use.
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glBegin(GL_QUADS); // begin drawing a cube
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// Front Face (note that the texture's corners have to match the quad's corners)
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glTexCoord2f(0.0f, 0.0f); glVertex3f(-1.0f, -1.0f, 1.0f); // Bottom Left Of The Texture and Quad
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glTexCoord2f(1.0f, 0.0f); glVertex3f( 1.0f, -1.0f, 1.0f); // Bottom Right Of The Texture and Quad
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glTexCoord2f(1.0f, 1.0f); glVertex3f( 1.0f, 1.0f, 1.0f); // Top Right Of The Texture and Quad
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glTexCoord2f(0.0f, 1.0f); glVertex3f(-1.0f, 1.0f, 1.0f); // Top Left Of The Texture and Quad
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// Back Face
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glTexCoord2f(1.0f, 0.0f); glVertex3f(-1.0f, -1.0f, -1.0f); // Bottom Right Of The Texture and Quad
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glTexCoord2f(1.0f, 1.0f); glVertex3f(-1.0f, 1.0f, -1.0f); // Top Right Of The Texture and Quad
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glTexCoord2f(0.0f, 1.0f); glVertex3f( 1.0f, 1.0f, -1.0f); // Top Left Of The Texture and Quad
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glTexCoord2f(0.0f, 0.0f); glVertex3f( 1.0f, -1.0f, -1.0f); // Bottom Left Of The Texture and Quad
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// Top Face
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glTexCoord2f(0.0f, 1.0f); glVertex3f(-1.0f, 1.0f, -1.0f); // Top Left Of The Texture and Quad
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glTexCoord2f(0.0f, 0.0f); glVertex3f(-1.0f, 1.0f, 1.0f); // Bottom Left Of The Texture and Quad
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glTexCoord2f(1.0f, 0.0f); glVertex3f( 1.0f, 1.0f, 1.0f); // Bottom Right Of The Texture and Quad
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glTexCoord2f(1.0f, 1.0f); glVertex3f( 1.0f, 1.0f, -1.0f); // Top Right Of The Texture and Quad
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// Bottom Face
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glTexCoord2f(1.0f, 1.0f); glVertex3f(-1.0f, -1.0f, -1.0f); // Top Right Of The Texture and Quad
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glTexCoord2f(0.0f, 1.0f); glVertex3f( 1.0f, -1.0f, -1.0f); // Top Left Of The Texture and Quad
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glTexCoord2f(0.0f, 0.0f); glVertex3f( 1.0f, -1.0f, 1.0f); // Bottom Left Of The Texture and Quad
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glTexCoord2f(1.0f, 0.0f); glVertex3f(-1.0f, -1.0f, 1.0f); // Bottom Right Of The Texture and Quad
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// Right face
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glTexCoord2f(1.0f, 0.0f); glVertex3f( 1.0f, -1.0f, -1.0f); // Bottom Right Of The Texture and Quad
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glTexCoord2f(1.0f, 1.0f); glVertex3f( 1.0f, 1.0f, -1.0f); // Top Right Of The Texture and Quad
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glTexCoord2f(0.0f, 1.0f); glVertex3f( 1.0f, 1.0f, 1.0f); // Top Left Of The Texture and Quad
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glTexCoord2f(0.0f, 0.0f); glVertex3f( 1.0f, -1.0f, 1.0f); // Bottom Left Of The Texture and Quad
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// Left Face
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glTexCoord2f(0.0f, 0.0f); glVertex3f(-1.0f, -1.0f, -1.0f); // Bottom Left Of The Texture and Quad
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glTexCoord2f(1.0f, 0.0f); glVertex3f(-1.0f, -1.0f, 1.0f); // Bottom Right Of The Texture and Quad
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glTexCoord2f(1.0f, 1.0f); glVertex3f(-1.0f, 1.0f, 1.0f); // Top Right Of The Texture and Quad
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glTexCoord2f(0.0f, 1.0f); glVertex3f(-1.0f, 1.0f, -1.0f); // Top Left Of The Texture and Quad
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glEnd(); // done with the polygon.
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xrot+=1.5f; // X Axis Rotation
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yrot+=1.5f; // Y Axis Rotation
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zrot+=1.5f; // Z Axis Rotation
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//
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// swap buffers to display, since we're double buffered.
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glKosSwapBuffers();
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}
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int main(int argc, char **argv)
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{
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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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