| /* |
| * Exercise EGL API functions |
| */ |
| |
| #define EGL_EGLEXT_PROTOTYPES |
| |
| #include <EGL/egl.h> |
| #include <EGL/eglext.h> |
| #include <GL/gl.h> |
| #include <assert.h> |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <string.h> |
| #include <unistd.h> |
| |
| |
| |
| #define PIXEL_CENTER(x) ((long)(x) + 0.5) |
| |
| #define GAP 10 |
| #define ROWS 3 |
| #define COLS 4 |
| |
| #define OPENGL_WIDTH 48 |
| #define OPENGL_HEIGHT 13 |
| |
| |
| GLenum rgb, doubleBuffer, windType; |
| GLint windW, windH; |
| |
| GLenum mode1, mode2; |
| GLint boxW, boxH; |
| GLubyte OpenGL_bits[] = { |
| 0x00, 0x03, 0x00, 0x00, 0x00, 0x00, |
| 0x7f, 0xfb, 0xff, 0xff, 0xff, 0x01, |
| 0x7f, 0xfb, 0xff, 0xff, 0xff, 0x01, |
| 0x00, 0x03, 0x00, 0x00, 0x00, 0x00, |
| 0x3e, 0x8f, 0xb7, 0xf9, 0xfc, 0x01, |
| 0x63, 0xdb, 0xb0, 0x8d, 0x0d, 0x00, |
| 0x63, 0xdb, 0xb7, 0x8d, 0x0d, 0x00, |
| 0x63, 0xdb, 0xb6, 0x8d, 0x0d, 0x00, |
| 0x63, 0x8f, 0xf3, 0xcc, 0x0d, 0x00, |
| 0x63, 0x00, 0x00, 0x0c, 0x4c, 0x0a, |
| 0x63, 0x00, 0x00, 0x0c, 0x4c, 0x0e, |
| 0x63, 0x00, 0x00, 0x8c, 0xed, 0x0e, |
| 0x3e, 0x00, 0x00, 0xf8, 0x0c, 0x00, |
| }; |
| |
| |
| static void Init(void) |
| { |
| |
| mode1 = GL_TRUE; |
| mode2 = GL_TRUE; |
| } |
| |
| static void Reshape(int width, int height) |
| { |
| |
| windW = (GLint)width; |
| windH = (GLint)height; |
| } |
| |
| #if 0 |
| static void RotateColorMask(void) |
| { |
| static GLint rotation = 0; |
| |
| rotation = (rotation + 1) & 0x3; |
| switch (rotation) { |
| case 0: |
| glColorMask(GL_TRUE, GL_TRUE, GL_TRUE, GL_TRUE); |
| glIndexMask( 0xff ); |
| break; |
| case 1: |
| glColorMask(GL_FALSE, GL_TRUE, GL_TRUE, GL_TRUE); |
| glIndexMask(0xFE); |
| break; |
| case 2: |
| glColorMask(GL_TRUE, GL_FALSE, GL_TRUE, GL_TRUE); |
| glIndexMask(0xFD); |
| break; |
| case 3: |
| glColorMask(GL_TRUE, GL_TRUE, GL_FALSE, GL_TRUE); |
| glIndexMask(0xFB); |
| break; |
| } |
| } |
| #endif |
| |
| static void Viewport(GLint row, GLint column) |
| { |
| GLint x, y; |
| |
| boxW = (windW - (COLS + 1) * GAP) / COLS; |
| boxH = (windH - (ROWS + 1) * GAP) / ROWS; |
| |
| x = GAP + column * (boxW + GAP); |
| y = GAP + row * (boxH + GAP); |
| |
| glViewport(x, y, boxW, boxH); |
| |
| glMatrixMode(GL_PROJECTION); |
| glLoadIdentity(); |
| glOrtho(-boxW/2, boxW/2, -boxH/2, boxH/2, 0.0, 1.0); |
| glMatrixMode(GL_MODELVIEW); |
| |
| glEnable(GL_SCISSOR_TEST); |
| glScissor(x, y, boxW, boxH); |
| } |
| |
| enum { |
| COLOR_BLACK = 0, |
| COLOR_RED, |
| COLOR_GREEN, |
| COLOR_YELLOW, |
| COLOR_BLUE, |
| COLOR_MAGENTA, |
| COLOR_CYAN, |
| COLOR_WHITE |
| }; |
| |
| static float RGBMap[9][3] = { |
| {0, 0, 0}, |
| {1, 0, 0}, |
| {0, 1, 0}, |
| {1, 1, 0}, |
| {0, 0, 1}, |
| {1, 0, 1}, |
| {0, 1, 1}, |
| {1, 1, 1}, |
| {0.5, 0.5, 0.5} |
| }; |
| |
| static void SetColor(int c) |
| { |
| glColor3fv(RGBMap[c]); |
| } |
| |
| static void Point(void) |
| { |
| GLint i; |
| |
| glBegin(GL_POINTS); |
| SetColor(COLOR_WHITE); |
| glVertex2i(0, 0); |
| for (i = 1; i < 8; i++) { |
| GLint j = i * 2; |
| SetColor(COLOR_BLACK+i); |
| glVertex2i(-j, -j); |
| glVertex2i(-j, 0); |
| glVertex2i(-j, j); |
| glVertex2i(0, j); |
| glVertex2i(j, j); |
| glVertex2i(j, 0); |
| glVertex2i(j, -j); |
| glVertex2i(0, -j); |
| } |
| glEnd(); |
| } |
| |
| static void Lines(void) |
| { |
| GLint i; |
| |
| glPushMatrix(); |
| |
| glTranslatef(-12, 0, 0); |
| for (i = 1; i < 8; i++) { |
| SetColor(COLOR_BLACK+i); |
| glBegin(GL_LINES); |
| glVertex2i(-boxW/4, -boxH/4); |
| glVertex2i(boxW/4, boxH/4); |
| glEnd(); |
| glTranslatef(4, 0, 0); |
| } |
| |
| glPopMatrix(); |
| |
| glBegin(GL_LINES); |
| glVertex2i(0, 0); |
| glEnd(); |
| } |
| |
| static void LineStrip(void) |
| { |
| |
| glBegin(GL_LINE_STRIP); |
| SetColor(COLOR_RED); |
| glVertex2f(PIXEL_CENTER(-boxW/4), PIXEL_CENTER(-boxH/4)); |
| SetColor(COLOR_GREEN); |
| glVertex2f(PIXEL_CENTER(-boxW/4), PIXEL_CENTER(boxH/4)); |
| SetColor(COLOR_BLUE); |
| glVertex2f(PIXEL_CENTER(boxW/4), PIXEL_CENTER(boxH/4)); |
| SetColor(COLOR_WHITE); |
| glVertex2f(PIXEL_CENTER(boxW/4), PIXEL_CENTER(-boxH/4)); |
| glEnd(); |
| |
| glBegin(GL_LINE_STRIP); |
| glVertex2i(0, 0); |
| glEnd(); |
| } |
| |
| static void LineLoop(void) |
| { |
| |
| glBegin(GL_LINE_LOOP); |
| SetColor(COLOR_RED); |
| glVertex2f(PIXEL_CENTER(-boxW/4), PIXEL_CENTER(-boxH/4)); |
| SetColor(COLOR_GREEN); |
| glVertex2f(PIXEL_CENTER(-boxW/4), PIXEL_CENTER(boxH/4)); |
| SetColor(COLOR_BLUE); |
| glVertex2f(PIXEL_CENTER(boxW/4), PIXEL_CENTER(boxH/4)); |
| SetColor(COLOR_WHITE); |
| glVertex2f(PIXEL_CENTER(boxW/4), PIXEL_CENTER(-boxH/4)); |
| glEnd(); |
| |
| glEnable(GL_LOGIC_OP); |
| glLogicOp(GL_XOR); |
| |
| glEnable(GL_BLEND); |
| glBlendFunc(GL_ONE, GL_ONE); |
| |
| SetColor(COLOR_MAGENTA); |
| glBegin(GL_LINE_LOOP); |
| glVertex2f(PIXEL_CENTER(-boxW/8), PIXEL_CENTER(-boxH/8)); |
| glVertex2f(PIXEL_CENTER(-boxW/8), PIXEL_CENTER(boxH/8)); |
| glEnd(); |
| glBegin(GL_LINE_LOOP); |
| glVertex2f(PIXEL_CENTER(-boxW/8), PIXEL_CENTER(boxH/8+5)); |
| glVertex2f(PIXEL_CENTER(boxW/8), PIXEL_CENTER(boxH/8+5)); |
| glEnd(); |
| glDisable(GL_LOGIC_OP); |
| glDisable(GL_BLEND); |
| |
| SetColor(COLOR_GREEN); |
| glBegin(GL_POINTS); |
| glVertex2i(0, 0); |
| glEnd(); |
| |
| glBegin(GL_LINE_LOOP); |
| glVertex2i(0, 0); |
| glEnd(); |
| } |
| |
| static void Bitmap(void) |
| { |
| |
| glBegin(GL_LINES); |
| SetColor(COLOR_GREEN); |
| glVertex2i(-boxW/2, 0); |
| glVertex2i(boxW/2, 0); |
| glVertex2i(0, -boxH/2); |
| glVertex2i(0, boxH/2); |
| SetColor(COLOR_RED); |
| glVertex2i(0, -3); |
| glVertex2i(0, -3+OPENGL_HEIGHT); |
| SetColor(COLOR_BLUE); |
| glVertex2i(0, -3); |
| glVertex2i(OPENGL_WIDTH, -3); |
| glEnd(); |
| |
| SetColor(COLOR_GREEN); |
| |
| glPixelStorei(GL_UNPACK_LSB_FIRST, GL_TRUE); |
| glPixelStorei(GL_UNPACK_ALIGNMENT, 1); |
| |
| glRasterPos2i(0, 0); |
| glBitmap(OPENGL_WIDTH, OPENGL_HEIGHT, 0, 3, 0.0, 0.0, OpenGL_bits); |
| } |
| |
| static void Triangles(void) |
| { |
| |
| glBegin(GL_TRIANGLES); |
| 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_GREEN); |
| glVertex2i(-boxW/4, boxH/4); |
| SetColor(COLOR_RED); |
| glVertex2i(-boxW/8, boxH/16); |
| SetColor(COLOR_BLUE); |
| glVertex2i(boxW/8, boxH/16); |
| glEnd(); |
| |
| glBegin(GL_TRIANGLES); |
| glVertex2i(0, 0); |
| glVertex2i(-100, 100); |
| glEnd(); |
| } |
| |
| static void TriangleStrip(void) |
| { |
| |
| glBegin(GL_TRIANGLE_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_TRIANGLE_STRIP); |
| glVertex2i(0, 0); |
| glVertex2i(-100, 100); |
| glEnd(); |
| } |
| |
| static void TriangleFan(void) |
| { |
| GLint vx[8][2]; |
| GLint x0, y0, x1, y1, x2, y2, x3, y3; |
| GLint i; |
| |
| y0 = -boxH/4; |
| 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_TRIANGLE_FAN); |
| SetColor(COLOR_WHITE); |
| glVertex2i(0, 0); |
| for (i = 0; i < 8; i++) { |
| SetColor(COLOR_WHITE-i); |
| glVertex2iv(vx[i]); |
| } |
| glEnd(); |
| |
| glBegin(GL_TRIANGLE_FAN); |
| glVertex2i(0, 0); |
| glVertex2i(-100, 100); |
| glEnd(); |
| } |
| |
| static void Rect(void) |
| { |
| |
| SetColor(COLOR_GREEN); |
| glRecti(-boxW/4, -boxH/4, boxW/4, boxH/4); |
| } |
| |
| static void PolygonFunc(void) |
| { |
| GLint vx[8][2]; |
| GLint x0, y0, x1, y1, x2, y2, x3, y3; |
| GLint i; |
| |
| y0 = -boxH/4; |
| 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(EGLDisplay dpy, EGLSurface surf) |
| { |
| |
| 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) { |
| eglSwapBuffers(dpy, surf); |
| } |
| } |
| |
| static void |
| write_ppm(const char *filename, const GLubyte *buffer, int width, int height) |
| { |
| const int binary = 0; |
| FILE *f = fopen( filename, "w" ); |
| if (f) { |
| int i, x, y; |
| const GLubyte *ptr = buffer; |
| if (binary) { |
| fprintf(f,"P6\n"); |
| fprintf(f,"# ppm-file created by osdemo.c\n"); |
| fprintf(f,"%i %i\n", width,height); |
| fprintf(f,"255\n"); |
| fclose(f); |
| f = fopen( filename, "ab" ); /* reopen in binary append mode */ |
| for (y=height-1; y>=0; y--) { |
| for (x=0; x<width; x++) { |
| i = (y*width + x) * 4; |
| fputc(ptr[i], f); /* write red */ |
| fputc(ptr[i+1], f); /* write green */ |
| fputc(ptr[i+2], f); /* write blue */ |
| } |
| } |
| } |
| else { |
| /*ASCII*/ |
| int counter = 0; |
| fprintf(f,"P3\n"); |
| fprintf(f,"# ascii ppm file created by osdemo.c\n"); |
| fprintf(f,"%i %i\n", width, height); |
| fprintf(f,"255\n"); |
| for (y=height-1; y>=0; y--) { |
| for (x=0; x<width; x++) { |
| i = (y*width + x) * 4; |
| fprintf(f, " %3d %3d %3d", ptr[i], ptr[i+1], ptr[i+2]); |
| counter++; |
| if (counter % 5 == 0) |
| fprintf(f, "\n"); |
| } |
| } |
| } |
| fclose(f); |
| } |
| } |
| |
| int |
| main(int argc, char *argv[]) |
| { |
| int maj, min; |
| EGLContext ctx; |
| EGLSurface screen_surf; |
| EGLConfig configs[10]; |
| EGLScreenMESA screen; |
| EGLModeMESA mode; |
| EGLint numConfigs, count; |
| EGLBoolean b; |
| const GLubyte *bitmap; |
| const EGLint screenAttribs[] = { |
| EGL_WIDTH, 1024, |
| EGL_HEIGHT, 768, |
| EGL_NONE |
| }; |
| |
| EGLDisplay d = eglGetDisplay(EGL_DEFAULT_DISPLAY); |
| assert(d); |
| |
| if (!eglInitialize(d, &maj, &min)) { |
| printf("demo: eglInitialize failed\n"); |
| exit(1); |
| } |
| |
| printf("EGL version = %d.%d\n", maj, min); |
| printf("EGL_VENDOR = %s\n", eglQueryString(d, EGL_VENDOR)); |
| if (!strstr(eglQueryString(d, EGL_EXTENSIONS), |
| "EGL_MESA_screen_surface")) { |
| printf("EGL_MESA_screen_surface is not supported\n"); |
| exit(1); |
| } |
| |
| eglGetConfigs(d, configs, 10, &numConfigs); |
| eglGetScreensMESA(d, &screen, 1, &count); |
| eglGetModesMESA(d, screen, &mode, 1, &count); |
| |
| ctx = eglCreateContext(d, configs[0], EGL_NO_CONTEXT, NULL); |
| if (ctx == EGL_NO_CONTEXT) { |
| printf("failed to create context\n"); |
| return 0; |
| } |
| |
| screen_surf = eglCreateScreenSurfaceMESA(d, configs[0], screenAttribs); |
| if (screen_surf == EGL_NO_SURFACE) { |
| printf("failed to create screen surface\n"); |
| return 0; |
| } |
| |
| eglShowScreenSurfaceMESA(d, screen, screen_surf, mode); |
| |
| b = eglMakeCurrent(d, screen_surf, screen_surf, ctx); |
| if (!b) { |
| printf("make current failed\n"); |
| return 0; |
| } |
| glViewport(0, 0, 1024, 768); |
| |
| |
| Init(); |
| Reshape(1024, 768); |
| |
| /* some drivers crash when rendering to front buffer */ |
| #if 0 |
| glDrawBuffer( GL_FRONT ); |
| glClearColor( 0, 1.0, 0, 1); |
| |
| glClear( GL_COLOR_BUFFER_BIT ); |
| #endif |
| |
| doubleBuffer = 1; |
| glDrawBuffer( GL_BACK ); |
| |
| Draw(d, screen_surf); |
| sleep(2); |
| |
| /* TODO EGL_KHR_lock_surface */ |
| bitmap = NULL; |
| if (bitmap) |
| write_ppm("dump.ppm", bitmap, 1024, 768); |
| |
| eglDestroySurface(d, screen_surf); |
| eglDestroyContext(d, ctx); |
| eglTerminate(d); |
| |
| return 0; |
| } |