347 lines
12 KiB
C
347 lines
12 KiB
C
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/* DREAMCAST
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*IAN MICHEAL Ported SDL+OPENGL USING SDL[DREAMHAL][GLDC][KOS2.0]2021
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* Cleaned and tested on dreamcast hardware by Ianmicheal
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* This Code Was Created By Pet & Commented/Cleaned Up By Jeff Molofee
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* If You've Found This Code Useful, Please Let Me Know.
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* Visit NeHe Productions At http://nehe.gamedev.net
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*/
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#include <math.h> // Header File For Windows Math Library
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#include <stdio.h> // Header File For Standard Input/Output
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#include <stdint.h>
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#include <stdlib.h>
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#define FPS 60
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uint32_t waittime = 1000.0f/FPS;
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uint32_t framestarttime = 0;
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int32_t delaytime;
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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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#endif
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/*
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* This Code Was Created By Jeff Molofee 2000
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* And Modified By Giuseppe D'Agata (waveform@tiscalinet.it)
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* If You've Found This Code Useful, Please Let Me Know.
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* Visit My Site At nehe.gamedev.net
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*/
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#include <math.h> // Header File For Windows Math Library
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#include <stdio.h> // Header File For Standard Input/Output
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#include <assert.h>
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#ifdef WIN32
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#define WIN32_LEAN_AND_MEAN
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#include <windows.h>
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#endif
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#if defined(__APPLE__) && defined(__MACH__)
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#include <OpenGL/gl.h> // Header File For The OpenGL32 Library
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#include <OpenGL/glu.h> // Header File For The GLu32 Library
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#elif defined(__DREAMCAST__)
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#include <kos.h>
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#include <GL/gl.h> // Header File For The OpenGL32 Library
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#include <GL/glu.h> // Header File For The GLu32 Library
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#include <GL/glkos.h>
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#else
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#include <GL/gl.h> // Header File For The OpenGL32 Library
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#include <GL/glu.h> // Header File For The GLu32 Library
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#endif
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#define BOOL int
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#define FALSE 0
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#define TRUE 1
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uint8_t* keys; // Array Used For The Keyboard Routine
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BOOL active=TRUE; // Window Active Flag Set To TRUE By Default
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BOOL fullscreen=FALSE; // Fullscreen Flag Set To Fullscreen Mode By Default
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BOOL masking=TRUE; // Masking On/Off
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BOOL mp; // M Pressed?
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BOOL sp; // Space Pressed?
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BOOL scene; // Which Scene To Draw
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GLuint texture[5]; // Storage For Our Five Textures
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GLuint loop; // Generic Loop Variable
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GLfloat roll; // Rolling Texture
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/* Image type - contains height, width, and data */
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struct Image {
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unsigned long sizeX;
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unsigned long sizeY;
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char *data;
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};
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typedef struct Image Image;
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int ImageLoad(char *filename, Image *image) {
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FILE *file;
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unsigned long size; // size of the image in bytes.
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unsigned long i; // standard counter.
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unsigned short int planes; // number of planes in image (must be 1)
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unsigned short int bpp; // number of bits per pixel (must be 24)
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char temp; // temporary color storage for bgr-rgb conversion.
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// make sure the file is there.
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if ((file = fopen(filename, "rb"))==NULL)
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{
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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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// seek through the bmp header, up to the width/height:
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fseek(file, 18, SEEK_CUR);
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// read the width
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if ((i = fread(&image->sizeX, 4, 1, file)) != 1) {
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printf("Error reading width from %s.\n", filename);
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return 0;
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}
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printf("Width of %s: %lu\n", filename, image->sizeX);
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// read the height
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if ((i = fread(&image->sizeY, 4, 1, file)) != 1) {
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printf("Error reading height from %s.\n", filename);
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return 0;
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}
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printf("Height of %s: %lu\n", filename, image->sizeY);
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// calculate the size (assuming 24 bits or 3 bytes per pixel).
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size = image->sizeX * image->sizeY * 3;
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// read the planes
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if ((fread(&planes, 2, 1, file)) != 1) {
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printf("Error reading planes from %s.\n", filename);
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return 0;
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}
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if (planes != 1) {
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printf("Planes from %s is not 1: %u\n", filename, planes);
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return 0;
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}
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// read the bpp
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if ((i = fread(&bpp, 2, 1, file)) != 1) {
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printf("Error reading bpp from %s.\n", filename);
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return 0;
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}
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if (bpp != 24) {
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printf("Bpp from %s is not 24: %u\n", filename, bpp);
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return 0;
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}
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// seek past the rest of the bitmap header.
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fseek(file, 24, SEEK_CUR);
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// read the data.
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image->data = (char *) malloc(size);
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if (image->data == NULL) {
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printf("Error allocating memory for color-corrected image data");
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return 0;
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}
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if ((i = fread(image->data, size, 1, file)) != 1) {
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fprintf(stderr, "Error reading image data from %s.\n", filename);
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return 0;
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}
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for (i=0;i<size;i+=3) { // reverse all of the colors. (bgr -> rgb)
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temp = image->data[i];
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image->data[i] = image->data[i+2];
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image->data[i+2] = temp;
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}
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// we're done.
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return 1;
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}
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int LoadGLTextures() // Load Bitmaps And Convert To Textures
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{
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int Status=FALSE; // Status Indicator
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Image TextureImage[5];
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if ((ImageLoad("/rd/logo.bmp", &TextureImage[0])) && // Logo Texture
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(ImageLoad("/rd/mask1.bmp", &TextureImage[1])) && // First Mask
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(ImageLoad("/rd/image1.bmp", &TextureImage[2])) && // First Image
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(ImageLoad("/rd/mask2.bmp", &TextureImage[3])) && // Second Mask
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(ImageLoad("/rd/image2.bmp", &TextureImage[4]))) // Second Image
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{
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Status=TRUE; // Set The Status To TRUE
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glGenTextures(5, &texture[0]); // Create Five Textures
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for (loop=0; loop<5; loop++) // Loop Through All 5 Textures
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{
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glBindTexture(GL_TEXTURE_2D, texture[loop]);
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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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glTexImage2D(
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GL_TEXTURE_2D, 0, 3,
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TextureImage[loop].sizeX,
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TextureImage[loop].sizeY, 0, GL_RGB, GL_UNSIGNED_BYTE,
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TextureImage[loop].data
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);
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}
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}
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return Status; // Return The Status
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}
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GLvoid ReSizeGLScene(GLsizei width, GLsizei height) // Resize And Initialize The GL Window
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{
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if (height==0) // Prevent A Divide By Zero By
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{
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height=1; // Making Height Equal One
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}
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glViewport(0,0,width,height); // Reset The Current Viewport
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glMatrixMode(GL_PROJECTION); // Select The Projection Matrix
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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 Window Aspect Ratio
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glMatrixMode(GL_MODELVIEW); // Select The Modelview Matrix
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glLoadIdentity(); // Reset The Modelview Matrix
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}
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int InitGL(GLvoid) // All Setup For OpenGL Goes Here
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{
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if (!LoadGLTextures()) // Jump To Texture Loading Routine
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{
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return FALSE; // If Texture Didn't Load Return FALSE
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}
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glClearColor(0.0f, 0.0f, 0.0f, 0.0f); // Clear The Background Color To Black
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glClearDepth(1.0); // Enables Clearing Of The Depth Buffer
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glEnable(GL_DEPTH_TEST); // Enable Depth Testing
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glShadeModel(GL_SMOOTH); // Enables Smooth Color Shading
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glEnable(GL_TEXTURE_2D); // Enable 2D Texture Mapping
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return TRUE; // Initialization Went OK
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}
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int DrawGLScene(GLvoid) // Here's Where We Do All The Drawing
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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 Modelview Matrix
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glTranslatef(0.0f,0.0f,-2.0f); // Move Into The Screen 5 Units
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glBindTexture(GL_TEXTURE_2D, texture[0]); // Select Our Logo Texture
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glBegin(GL_QUADS); // Start Drawing A Textured Quad
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glTexCoord2f(0.0f, -roll+0.0f); glVertex3f(-1.1f, -1.1f, 0.0f); // Bottom Left
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glTexCoord2f(3.0f, -roll+0.0f); glVertex3f( 1.1f, -1.1f, 0.0f); // Bottom Right
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glTexCoord2f(3.0f, -roll+3.0f); glVertex3f( 1.1f, 1.1f, 0.0f); // Top Right
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glTexCoord2f(0.0f, -roll+3.0f); glVertex3f(-1.1f, 1.1f, 0.0f); // Top Left
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glEnd(); // Done Drawing The Quad
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glEnable(GL_BLEND); // Enable Blending
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glDisable(GL_DEPTH_TEST); // Disable Depth Testing
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if (masking) // Is Masking Enabled?
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{
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glBlendFunc(GL_DST_COLOR,GL_ZERO); // Blend Screen Color With Zero (Black)
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}
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if (scene) // Are We Drawing The Second Scene?
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{
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glTranslatef(0.0f,0.0f,-1.0f); // Translate Into The Screen One Unit
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glRotatef(roll*360,0.0f,0.0f,1.0f); // Rotate On The Z Axis 360 Degrees.
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if (masking) // Is Masking On?
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{
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glBindTexture(GL_TEXTURE_2D, texture[3]); // Select The Second Mask Texture
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glBegin(GL_QUADS); // Start Drawing A Textured Quad
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glTexCoord2f(0.0f, 0.0f); glVertex3f(-1.1f, -1.1f, 0.0f); // Bottom Left
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glTexCoord2f(1.0f, 0.0f); glVertex3f( 1.1f, -1.1f, 0.0f); // Bottom Right
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glTexCoord2f(1.0f, 1.0f); glVertex3f( 1.1f, 1.1f, 0.0f); // Top Right
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glTexCoord2f(0.0f, 1.0f); glVertex3f(-1.1f, 1.1f, 0.0f); // Top Left
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glEnd(); // Done Drawing The Quad
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}
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glBlendFunc(GL_ONE, GL_ONE); // Copy Image 2 Color To The Screen
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glBindTexture(GL_TEXTURE_2D, texture[4]); // Select The Second Image Texture
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glBegin(GL_QUADS); // Start Drawing A Textured Quad
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glTexCoord2f(0.0f, 0.0f); glVertex3f(-1.1f, -1.1f, 0.0f); // Bottom Left
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glTexCoord2f(1.0f, 0.0f); glVertex3f( 1.1f, -1.1f, 0.0f); // Bottom Right
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glTexCoord2f(1.0f, 1.0f); glVertex3f( 1.1f, 1.1f, 0.0f); // Top Right
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glTexCoord2f(0.0f, 1.0f); glVertex3f(-1.1f, 1.1f, 0.0f); // Top Left
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glEnd(); // Done Drawing The Quad
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}
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else // Otherwise
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{
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if (masking) // Is Masking On?
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{
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glBindTexture(GL_TEXTURE_2D, texture[1]); // Select The First Mask Texture
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glBegin(GL_QUADS); // Start Drawing A Textured Quad
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glTexCoord2f(roll+0.0f, 0.0f); glVertex3f(-1.1f, -1.1f, 0.0f); // Bottom Left
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glTexCoord2f(roll+4.0f, 0.0f); glVertex3f( 1.1f, -1.1f, 0.0f); // Bottom Right
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glTexCoord2f(roll+4.0f, 4.0f); glVertex3f( 1.1f, 1.1f, 0.0f); // Top Right
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glTexCoord2f(roll+0.0f, 4.0f); glVertex3f(-1.1f, 1.1f, 0.0f); // Top Left
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glEnd(); // Done Drawing The Quad
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}
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glBlendFunc(GL_ONE, GL_ONE); // Copy Image 1 Color To The Screen
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glBindTexture(GL_TEXTURE_2D, texture[2]); // Select The First Image Texture
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glBegin(GL_QUADS); // Start Drawing A Textured Quad
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glTexCoord2f(roll+0.0f, 0.0f); glVertex3f(-1.1f, -1.1f, 0.0f); // Bottom Left
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glTexCoord2f(roll+4.0f, 0.0f); glVertex3f( 1.1f, -1.1f, 0.0f); // Bottom Right
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glTexCoord2f(roll+4.0f, 4.0f); glVertex3f( 1.1f, 1.1f, 0.0f); // Top Right
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glTexCoord2f(roll+0.0f, 4.0f); glVertex3f(-1.1f, 1.1f, 0.0f); // Top Left
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glEnd(); // Done Drawing The Quad
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}
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glEnable(GL_DEPTH_TEST); // Enable Depth Testing
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glDisable(GL_BLEND); // Disable Blending
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roll+=0.002f; // Increase Our Texture Roll Variable
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if (roll>1.0f) // Is Roll Greater Than One
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{
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roll-=1.0f; // Subtract 1 From Roll
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}
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glKosSwapBuffers();
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return TRUE; // Everything Went OK
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}
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int main(int argc, char *argv[])
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{
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BOOL done=FALSE; // Bool Variable To Exit Loop
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glKosInit();
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InitGL();
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ReSizeGLScene(640, 480);
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#ifdef __DREAMCAST__
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maple_device_t* cont = maple_enum_type(0, MAPLE_FUNC_CONTROLLER);
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assert(cont);
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#endif
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while(1) {
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DrawGLScene();
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#ifdef __DREAMCAST__
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cont_state_t* state = (cont_state_t *)maple_dev_status(cont);
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if((state->buttons & CONT_A) && !sp) {
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sp = TRUE;
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scene = !scene;
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} else {
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sp = FALSE;
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}
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if((state->buttons & CONT_B) && !mp) {
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mp = TRUE;
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masking = !masking;
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} else {
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mp = FALSE;
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}
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|
if(state->buttons & CONT_START) {
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
#endif
|
||
|
|
}
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|