560 lines
11 KiB
C
560 lines
11 KiB
C
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#define GL_GLEXT_PROTOTYPES
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#include <stdio.h>
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#include <string.h>
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#include <stdlib.h>
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#include <GL/glut.h>
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#define PIXEL_CENTER(x) ((long)(x) + 0.5)
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#define GAP 10
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#define ROWS 3
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#define COLS 4
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#define OPENGL_WIDTH 48
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#define OPENGL_HEIGHT 13
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GLenum provoking = GL_LAST_VERTEX_CONVENTION_EXT;
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GLenum rgb, doubleBuffer, windType;
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GLint windW, windH;
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GLenum mode1, mode2;
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GLint boxW, boxH;
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GLubyte OpenGL_bits[] = {
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0x00, 0x03, 0x00, 0x00, 0x00, 0x00,
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0x7f, 0xfb, 0xff, 0xff, 0xff, 0x01,
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0x7f, 0xfb, 0xff, 0xff, 0xff, 0x01,
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0x00, 0x03, 0x00, 0x00, 0x00, 0x00,
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0x3e, 0x8f, 0xb7, 0xf9, 0xfc, 0x01,
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0x63, 0xdb, 0xb0, 0x8d, 0x0d, 0x00,
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0x63, 0xdb, 0xb7, 0x8d, 0x0d, 0x00,
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0x63, 0xdb, 0xb6, 0x8d, 0x0d, 0x00,
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0x63, 0x8f, 0xf3, 0xcc, 0x0d, 0x00,
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0x63, 0x00, 0x00, 0x0c, 0x4c, 0x0a,
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0x63, 0x00, 0x00, 0x0c, 0x4c, 0x0e,
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0x63, 0x00, 0x00, 0x8c, 0xed, 0x0e,
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0x3e, 0x00, 0x00, 0xf8, 0x0c, 0x00,
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};
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#include "tkmap.c"
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static void Init(void)
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{
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mode1 = GL_TRUE;
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mode2 = GL_TRUE;
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}
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static void Reshape(int width, int height)
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{
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windW = (GLint)width;
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windH = (GLint)height;
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}
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static void RotateColorMask(void)
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{
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static GLint rotation = 0;
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rotation = (rotation + 1) & 0x3;
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switch (rotation) {
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case 0:
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glColorMask(GL_TRUE, GL_TRUE, GL_TRUE, GL_TRUE);
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glIndexMask( 0xff );
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break;
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case 1:
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glColorMask(GL_FALSE, GL_TRUE, GL_TRUE, GL_TRUE);
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glIndexMask(0xFE);
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break;
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case 2:
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glColorMask(GL_TRUE, GL_FALSE, GL_TRUE, GL_TRUE);
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glIndexMask(0xFD);
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break;
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case 3:
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glColorMask(GL_TRUE, GL_TRUE, GL_FALSE, GL_TRUE);
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glIndexMask(0xFB);
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break;
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}
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}
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static void Key(unsigned char key, int x, int y)
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{
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switch (key) {
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case 27:
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exit(1);
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case '1':
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mode1 = !mode1;
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break;
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case '2':
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mode2 = !mode2;
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break;
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case '3':
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RotateColorMask();
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break;
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case 'p':
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if (provoking == GL_FIRST_VERTEX_CONVENTION_EXT) {
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printf("provoke last\n");
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provoking = GL_LAST_VERTEX_CONVENTION_EXT;
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}
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else {
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printf("provoke first\n");
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provoking = GL_FIRST_VERTEX_CONVENTION_EXT;
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}
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glProvokingVertexEXT(provoking);
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break;
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default:
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return;
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}
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glutPostRedisplay();
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}
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static void Viewport(GLint row, GLint column)
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{
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GLint x, y;
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boxW = (windW - (COLS + 1) * GAP) / COLS;
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boxH = (windH - (ROWS + 1) * GAP) / ROWS;
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x = GAP + column * (boxW + GAP);
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y = GAP + row * (boxH + GAP);
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glViewport(x, y, boxW, boxH);
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glMatrixMode(GL_PROJECTION);
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glLoadIdentity();
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glOrtho(-boxW/2, boxW/2, -boxH/2, boxH/2, 0.0, 1.0);
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glMatrixMode(GL_MODELVIEW);
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glEnable(GL_SCISSOR_TEST);
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glScissor(x, y, boxW, boxH);
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}
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static void Point(void)
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{
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GLint i;
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glBegin(GL_POINTS);
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SetColor(COLOR_WHITE);
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glVertex2i(0, 0);
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for (i = 1; i < 8; i++) {
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GLint j = i * 2;
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SetColor(COLOR_BLACK+i);
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glVertex2i(-j, -j);
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glVertex2i(-j, 0);
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glVertex2i(-j, j);
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glVertex2i(0, j);
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glVertex2i(j, j);
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glVertex2i(j, 0);
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glVertex2i(j, -j);
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glVertex2i(0, -j);
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}
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glEnd();
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}
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static void Lines(void)
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{
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GLint i;
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glPushMatrix();
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glTranslatef(-12, 0, 0);
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for (i = 1; i < 8; i++) {
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glBegin(GL_LINES);
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SetColor(COLOR_BLACK+i);
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glVertex2i(-boxW/4, -boxH/4);
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SetColor(COLOR_BLACK+i+1);
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glVertex2i(boxW/4, boxH/4);
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glEnd();
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glTranslatef(4, 0, 0);
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}
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glPopMatrix();
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glBegin(GL_LINES);
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glVertex2i(0, 0);
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glEnd();
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}
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static void LineStrip(void)
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{
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glBegin(GL_LINE_STRIP);
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SetColor(COLOR_RED);
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glVertex2f(PIXEL_CENTER(-boxW/4), PIXEL_CENTER(-boxH/4));
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SetColor(COLOR_GREEN);
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glVertex2f(PIXEL_CENTER(-boxW/4), PIXEL_CENTER(boxH/4));
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SetColor(COLOR_BLUE);
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glVertex2f(PIXEL_CENTER(boxW/4), PIXEL_CENTER(boxH/4));
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SetColor(COLOR_WHITE);
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glVertex2f(PIXEL_CENTER(boxW/4), PIXEL_CENTER(-boxH/4));
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glEnd();
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glBegin(GL_LINE_STRIP);
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glVertex2i(0, 0);
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glEnd();
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}
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static void LineLoop(void)
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{
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glBegin(GL_LINE_LOOP);
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SetColor(COLOR_RED);
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glVertex2f(PIXEL_CENTER(-boxW/4), PIXEL_CENTER(-boxH/4));
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SetColor(COLOR_GREEN);
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glVertex2f(PIXEL_CENTER(-boxW/4), PIXEL_CENTER(boxH/4));
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SetColor(COLOR_BLUE);
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glVertex2f(PIXEL_CENTER(boxW/4), PIXEL_CENTER(boxH/4));
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SetColor(COLOR_WHITE);
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glVertex2f(PIXEL_CENTER(boxW/4), PIXEL_CENTER(-boxH/4));
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glEnd();
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glEnable(GL_LOGIC_OP);
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glLogicOp(GL_XOR);
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glEnable(GL_BLEND);
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glBlendFunc(GL_ONE, GL_ONE);
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SetColor(COLOR_MAGENTA);
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glBegin(GL_LINE_LOOP);
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glVertex2f(PIXEL_CENTER(-boxW/8), PIXEL_CENTER(-boxH/8));
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glVertex2f(PIXEL_CENTER(-boxW/8), PIXEL_CENTER(boxH/8));
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glEnd();
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glBegin(GL_LINE_LOOP);
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glVertex2f(PIXEL_CENTER(-boxW/8), PIXEL_CENTER(boxH/8+5));
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glVertex2f(PIXEL_CENTER(boxW/8), PIXEL_CENTER(boxH/8+5));
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glEnd();
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glDisable(GL_LOGIC_OP);
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glDisable(GL_BLEND);
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SetColor(COLOR_GREEN);
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glBegin(GL_POINTS);
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glVertex2i(0, 0);
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glEnd();
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glBegin(GL_LINE_LOOP);
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glVertex2i(0, 0);
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glEnd();
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}
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static void Bitmap(void)
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{
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glBegin(GL_LINES);
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SetColor(COLOR_GREEN);
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glVertex2i(-boxW/2, 0);
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glVertex2i(boxW/2, 0);
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glVertex2i(0, -boxH/2);
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glVertex2i(0, boxH/2);
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SetColor(COLOR_RED);
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glVertex2i(0, -3);
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glVertex2i(0, -3+OPENGL_HEIGHT);
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SetColor(COLOR_BLUE);
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glVertex2i(0, -3);
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glVertex2i(OPENGL_WIDTH, -3);
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glEnd();
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SetColor(COLOR_GREEN);
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glPixelStorei(GL_UNPACK_LSB_FIRST, GL_TRUE);
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glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
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glRasterPos2i(0, 0);
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glBitmap(OPENGL_WIDTH, OPENGL_HEIGHT, 0, 3, 0.0, 0.0, OpenGL_bits);
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}
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static void Triangles(void)
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{
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glBegin(GL_TRIANGLES);
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SetColor(COLOR_GREEN);
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glVertex2i(-boxW/4, -boxH/4);
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SetColor(COLOR_RED);
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glVertex2i(-boxW/8, -boxH/16);
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SetColor(COLOR_BLUE);
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glVertex2i(boxW/8, -boxH/16);
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SetColor(COLOR_GREEN);
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glVertex2i(-boxW/4, boxH/4);
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SetColor(COLOR_RED);
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glVertex2i(-boxW/8, boxH/16);
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SetColor(COLOR_BLUE);
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glVertex2i(boxW/8, boxH/16);
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glEnd();
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glBegin(GL_TRIANGLES);
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glVertex2i(0, 0);
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glVertex2i(-100, 100);
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glEnd();
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}
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static void TriangleStrip(void)
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{
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glBegin(GL_TRIANGLE_STRIP);
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SetColor(COLOR_GREEN);
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glVertex2i(-boxW/4, -boxH/4);
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SetColor(COLOR_RED);
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glVertex2i(-boxW/4, boxH/4);
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SetColor(COLOR_BLUE);
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glVertex2i(0, -boxH/4);
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SetColor(COLOR_WHITE);
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glVertex2i(0, boxH/4);
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SetColor(COLOR_CYAN);
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glVertex2i(boxW/4, -boxH/4);
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SetColor(COLOR_YELLOW);
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glVertex2i(boxW/4, boxH/4);
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glEnd();
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glBegin(GL_TRIANGLE_STRIP);
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glVertex2i(0, 0);
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glVertex2i(-100, 100);
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glEnd();
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}
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static void TriangleFan(void)
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{
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GLint vx[8][2];
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GLint x0, y0, x1, y1, x2, y2, x3, y3;
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GLint i;
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y0 = -boxH/4;
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y1 = y0 + boxH/2/3;
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y2 = y1 + boxH/2/3;
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y3 = boxH/4;
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x0 = -boxW/4;
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x1 = x0 + boxW/2/3;
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x2 = x1 + boxW/2/3;
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x3 = boxW/4;
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vx[0][0] = x0; vx[0][1] = y1;
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vx[1][0] = x0; vx[1][1] = y2;
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vx[2][0] = x1; vx[2][1] = y3;
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vx[3][0] = x2; vx[3][1] = y3;
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vx[4][0] = x3; vx[4][1] = y2;
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vx[5][0] = x3; vx[5][1] = y1;
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vx[6][0] = x2; vx[6][1] = y0;
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vx[7][0] = x1; vx[7][1] = y0;
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glBegin(GL_TRIANGLE_FAN);
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SetColor(COLOR_WHITE);
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glVertex2i(0, 0);
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for (i = 0; i < 8; i++) {
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SetColor(COLOR_WHITE-i);
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glVertex2iv(vx[i]);
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}
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glEnd();
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glBegin(GL_TRIANGLE_FAN);
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glVertex2i(0, 0);
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glVertex2i(-100, 100);
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glEnd();
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}
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static void Rect(void)
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{
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SetColor(COLOR_GREEN);
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glRecti(-boxW/4, -boxH/4, boxW/4, boxH/4);
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}
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static void PolygonFunc(void)
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{
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GLint vx[8][2];
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GLint x0, y0, x1, y1, x2, y2, x3, y3;
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GLint i;
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y0 = -boxH/4;
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y1 = y0 + boxH/2/3;
|
||
|
|
y2 = y1 + boxH/2/3;
|
||
|
|
y3 = boxH/4;
|
||
|
|
x0 = -boxW/4;
|
||
|
|
x1 = x0 + boxW/2/3;
|
||
|
|
x2 = x1 + boxW/2/3;
|
||
|
|
x3 = boxW/4;
|
||
|
|
|
||
|
|
vx[0][0] = x0; vx[0][1] = y1;
|
||
|
|
vx[1][0] = x0; vx[1][1] = y2;
|
||
|
|
vx[2][0] = x1; vx[2][1] = y3;
|
||
|
|
vx[3][0] = x2; vx[3][1] = y3;
|
||
|
|
vx[4][0] = x3; vx[4][1] = y2;
|
||
|
|
vx[5][0] = x3; vx[5][1] = y1;
|
||
|
|
vx[6][0] = x2; vx[6][1] = y0;
|
||
|
|
vx[7][0] = x1; vx[7][1] = y0;
|
||
|
|
|
||
|
|
glBegin(GL_POLYGON);
|
||
|
|
for (i = 0; i < 8; i++) {
|
||
|
|
SetColor(COLOR_WHITE-i);
|
||
|
|
glVertex2iv(vx[i]);
|
||
|
|
}
|
||
|
|
glEnd();
|
||
|
|
|
||
|
|
glBegin(GL_POLYGON);
|
||
|
|
glVertex2i(0, 0);
|
||
|
|
glVertex2i(100, 100);
|
||
|
|
glEnd();
|
||
|
|
}
|
||
|
|
|
||
|
|
static void Quads(void)
|
||
|
|
{
|
||
|
|
|
||
|
|
glBegin(GL_QUADS);
|
||
|
|
SetColor(COLOR_GREEN);
|
||
|
|
glVertex2i(-boxW/4, -boxH/4);
|
||
|
|
SetColor(COLOR_RED);
|
||
|
|
glVertex2i(-boxW/8, -boxH/16);
|
||
|
|
SetColor(COLOR_BLUE);
|
||
|
|
glVertex2i(boxW/8, -boxH/16);
|
||
|
|
SetColor(COLOR_WHITE);
|
||
|
|
glVertex2i(boxW/4, -boxH/4);
|
||
|
|
|
||
|
|
SetColor(COLOR_GREEN);
|
||
|
|
glVertex2i(-boxW/4, boxH/4);
|
||
|
|
SetColor(COLOR_RED);
|
||
|
|
glVertex2i(-boxW/8, boxH/16);
|
||
|
|
SetColor(COLOR_BLUE);
|
||
|
|
glVertex2i(boxW/8, boxH/16);
|
||
|
|
SetColor(COLOR_WHITE);
|
||
|
|
glVertex2i(boxW/4, boxH/4);
|
||
|
|
glEnd();
|
||
|
|
|
||
|
|
glBegin(GL_QUADS);
|
||
|
|
glVertex2i(0, 0);
|
||
|
|
glVertex2i(100, 100);
|
||
|
|
glVertex2i(-100, 100);
|
||
|
|
glEnd();
|
||
|
|
}
|
||
|
|
|
||
|
|
static void QuadStrip(void)
|
||
|
|
{
|
||
|
|
|
||
|
|
glBegin(GL_QUAD_STRIP);
|
||
|
|
SetColor(COLOR_GREEN);
|
||
|
|
glVertex2i(-boxW/4, -boxH/4);
|
||
|
|
SetColor(COLOR_RED);
|
||
|
|
glVertex2i(-boxW/4, boxH/4);
|
||
|
|
SetColor(COLOR_BLUE);
|
||
|
|
glVertex2i(0, -boxH/4);
|
||
|
|
SetColor(COLOR_WHITE);
|
||
|
|
glVertex2i(0, boxH/4);
|
||
|
|
SetColor(COLOR_CYAN);
|
||
|
|
glVertex2i(boxW/4, -boxH/4);
|
||
|
|
SetColor(COLOR_YELLOW);
|
||
|
|
glVertex2i(boxW/4, boxH/4);
|
||
|
|
glEnd();
|
||
|
|
|
||
|
|
glBegin(GL_QUAD_STRIP);
|
||
|
|
glVertex2i(0, 0);
|
||
|
|
glVertex2i(100, 100);
|
||
|
|
glVertex2i(-100, 100);
|
||
|
|
glEnd();
|
||
|
|
}
|
||
|
|
|
||
|
|
static void Draw(void)
|
||
|
|
{
|
||
|
|
|
||
|
|
glViewport(0, 0, windW, windH);
|
||
|
|
glDisable(GL_SCISSOR_TEST);
|
||
|
|
|
||
|
|
glPushAttrib(GL_COLOR_BUFFER_BIT);
|
||
|
|
|
||
|
|
glColorMask(1, 1, 1, 1);
|
||
|
|
glIndexMask(~0);
|
||
|
|
|
||
|
|
glClearColor(0.0, 0.0, 0.0, 0.0);
|
||
|
|
glClear(GL_COLOR_BUFFER_BIT);
|
||
|
|
|
||
|
|
glPopAttrib();
|
||
|
|
|
||
|
|
if (mode1) {
|
||
|
|
glShadeModel(GL_SMOOTH);
|
||
|
|
} else {
|
||
|
|
glShadeModel(GL_FLAT);
|
||
|
|
}
|
||
|
|
|
||
|
|
if (mode2) {
|
||
|
|
glPolygonMode(GL_FRONT_AND_BACK, GL_FILL);
|
||
|
|
} else {
|
||
|
|
glPolygonMode(GL_FRONT_AND_BACK, GL_LINE);
|
||
|
|
}
|
||
|
|
|
||
|
|
Viewport(0, 0); Point();
|
||
|
|
Viewport(0, 1); Lines();
|
||
|
|
Viewport(0, 2); LineStrip();
|
||
|
|
Viewport(0, 3); LineLoop();
|
||
|
|
|
||
|
|
Viewport(1, 0); Bitmap();
|
||
|
|
Viewport(1, 1); TriangleFan();
|
||
|
|
Viewport(1, 2); Triangles();
|
||
|
|
Viewport(1, 3); TriangleStrip();
|
||
|
|
|
||
|
|
Viewport(2, 0); Rect();
|
||
|
|
Viewport(2, 1); PolygonFunc();
|
||
|
|
Viewport(2, 2); Quads();
|
||
|
|
Viewport(2, 3); QuadStrip();
|
||
|
|
|
||
|
|
glFlush();
|
||
|
|
|
||
|
|
if (doubleBuffer) {
|
||
|
|
glutSwapBuffers();
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
static GLenum Args(int argc, char **argv)
|
||
|
|
{
|
||
|
|
GLint i;
|
||
|
|
|
||
|
|
rgb = GL_TRUE;
|
||
|
|
doubleBuffer = GL_FALSE;
|
||
|
|
|
||
|
|
for (i = 1; i < argc; i++) {
|
||
|
|
if (strcmp(argv[i], "-ci") == 0) {
|
||
|
|
rgb = GL_FALSE;
|
||
|
|
} else if (strcmp(argv[i], "-rgb") == 0) {
|
||
|
|
rgb = GL_TRUE;
|
||
|
|
} else if (strcmp(argv[i], "-sb") == 0) {
|
||
|
|
doubleBuffer = GL_FALSE;
|
||
|
|
} else if (strcmp(argv[i], "-db") == 0) {
|
||
|
|
doubleBuffer = GL_TRUE;
|
||
|
|
} else {
|
||
|
|
printf("%s (Bad option).\n", argv[i]);
|
||
|
|
return GL_FALSE;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return GL_TRUE;
|
||
|
|
}
|
||
|
|
|
||
|
|
int main(int argc, char **argv)
|
||
|
|
{
|
||
|
|
glutInit(&argc, argv);
|
||
|
|
|
||
|
|
if (Args(argc, argv) == GL_FALSE) {
|
||
|
|
exit(1);
|
||
|
|
}
|
||
|
|
|
||
|
|
windW = 600;
|
||
|
|
windH = 300;
|
||
|
|
glutInitWindowPosition(0, 0); glutInitWindowSize( windW, windH);
|
||
|
|
|
||
|
|
windType = (rgb) ? GLUT_RGB : GLUT_INDEX;
|
||
|
|
windType |= (doubleBuffer) ? GLUT_DOUBLE : GLUT_SINGLE;
|
||
|
|
glutInitDisplayMode(windType);
|
||
|
|
|
||
|
|
if (glutCreateWindow("Primitive Test") == GL_FALSE) {
|
||
|
|
exit(1);
|
||
|
|
}
|
||
|
|
|
||
|
|
InitMap();
|
||
|
|
|
||
|
|
Init();
|
||
|
|
|
||
|
|
glutReshapeFunc(Reshape);
|
||
|
|
glutKeyboardFunc(Key);
|
||
|
|
glutDisplayFunc(Draw);
|
||
|
|
glutMainLoop();
|
||
|
|
return 0;
|
||
|
|
}
|