diff options
author | Eric Anholt <[email protected]> | 2010-05-21 09:32:38 -0700 |
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committer | Eric Anholt <[email protected]> | 2010-05-21 12:20:39 -0700 |
commit | 68fc4b415e322f6744299e39864fbc377c6eff74 (patch) | |
tree | 4bafffd8b0105174f3c5c0ae327a005be9145990 /progs/samples/blendeq.c | |
parent | e4f4489e3fc0b36d72821b55794fb843b2b7fa5f (diff) |
Remove demos that have moved to git+ssh://git.freedesktop.org/git/mesa/demos.
The remaining programs are ones I've had difficulty finding a build
environment for to make the build system or are unit tests that should
probably live next to their code instead. Hopefully people can bring
over the build for remaining pieces they care about.
Diffstat (limited to 'progs/samples/blendeq.c')
-rw-r--r-- | progs/samples/blendeq.c | 311 |
1 files changed, 0 insertions, 311 deletions
diff --git a/progs/samples/blendeq.c b/progs/samples/blendeq.c deleted file mode 100644 index 037d06fa528..00000000000 --- a/progs/samples/blendeq.c +++ /dev/null @@ -1,311 +0,0 @@ -/* -** blendeq.c - Demonstrates the use of the blend_minmax, blend_subtract, -** and blend_logic_op extensions using glBlendEquationEXT. -** -** Over a two-color backround, draw rectangles using twelve blend -** options. The values are read back as UNSIGNED_BYTE and printed -** in hex over each value. These values are useful for logic -** op comparisons when channels are 8 bits deep. -*/ - -#include <string.h> -#include <stdlib.h> -#include <stdio.h> -#include <GL/glew.h> -#include <GL/glut.h> - -GLenum doubleBuffer; -static int dithering = 0; -int use11ops = 0; -int supportlogops = 0; -static int doPrint = 1; -static int deltaY; -GLint windW, windH; - -static const struct { - GLenum mode; - const char *name; -} LogicOpModes[] = { - { GL_SET, "GL_SET" }, - { GL_COPY, "GL_COPY" }, - { GL_NOOP, "GL_NOOP" }, - { GL_AND, "GL_AND" }, - { GL_INVERT, "GL_INVERT" }, - { GL_OR, "GL_OR" }, - { GL_XOR, "GL_XOR" }, - { GL_NOR, "GL_NOR" }, - { GL_NAND, "GL_NAND" }, - { GL_OR_REVERSE, "GL_OR_REVERSE" }, - { GL_OR_INVERTED, "GL_OR_INVERTED" }, - { GL_AND_INVERTED, "GL_AND_INVERTED" }, - { 0, NULL } -}; - - - -static void DrawString(const char *string) -{ - int i; - - for (i = 0; string[i]; i++) - glutBitmapCharacter(GLUT_BITMAP_9_BY_15, string[i]); -} - -static void Init(void) -{ - - glDisable(GL_DITHER); - glShadeModel(GL_FLAT); -} - -static void Reshape(int width, int height) -{ - - windW = (GLint)width; - windH = (GLint)height; - - glViewport(0, 0, (GLint)width, (GLint)height); - deltaY = windH /20; - - glMatrixMode(GL_PROJECTION); - glLoadIdentity(); - gluOrtho2D(0, windW, 0, windH); - glMatrixMode(GL_MODELVIEW); -} - -static void Key(unsigned char key, int x, int y) -{ - - switch (key) { - case 27: - exit(1); - case 'd': - dithering = !dithering; - break; - case 'l': - if (supportlogops == 3) - use11ops = (!use11ops); - if (use11ops) - printf("Using GL 1.1 color logic ops.\n"); - else printf("Using GL_EXT_blend_logic_op.\n"); - break; - default: - return; - } - - glutPostRedisplay(); -} - -static void PrintColorStrings( void ) -{ - GLubyte ubbuf[3]; - int i, xleft, xright; - char colorString[100]; - - xleft = 5 + windW/4; - xright = 5 + windW/2; - - for (i = windH - deltaY + 4; i > 0; i-=deltaY) { - glReadPixels(xleft, i+10, 1, 1, GL_RGB, GL_UNSIGNED_BYTE, ubbuf); - sprintf(colorString, "(0x%x, 0x%x, 0x%x)", - ubbuf[0], ubbuf[1], ubbuf[2]); - glRasterPos2f(xleft, i); - DrawString(colorString); - glReadPixels(xright, i+10, 1, 1, GL_RGB, GL_UNSIGNED_BYTE, ubbuf); - sprintf(colorString, "(0x%x, 0x%x, 0x%x)", - ubbuf[0], ubbuf[1], ubbuf[2]); - glRasterPos2f(xright, i); - DrawString(colorString); - } -} - -static void Draw(void) -{ - int stringOffset = 5, stringx = 8; - int x1, x2, xleft, xright; - int i, k; - - (dithering) ? glEnable(GL_DITHER) : glDisable(GL_DITHER); - glDisable(GL_BLEND); - if (supportlogops & 2) - glDisable(GL_COLOR_LOGIC_OP); - - glClearColor(0.5, 0.6, 0.1, 1.0); - glClear(GL_COLOR_BUFFER_BIT); - - /* Draw background */ - glColor3f(0.1, 0.1, 1.0); - glRectf(0.0, 0.0, windW/2, windH); - - /* Draw labels */ - glColor3f(0.8, 0.8, 0.0); - i = windH - deltaY + stringOffset; - - glRasterPos2f(stringx, i); i -= deltaY; - DrawString("SOURCE"); - glRasterPos2f(stringx, i); i -= deltaY; - DrawString("DEST"); - glRasterPos2f(stringx, i); i -= deltaY; - DrawString("min"); - glRasterPos2f(stringx, i); i -= deltaY; - DrawString("max"); - glRasterPos2f(stringx, i); i -= deltaY; - DrawString("subtract"); - glRasterPos2f(stringx, i); i -= deltaY; - DrawString("reverse_subtract"); - glRasterPos2f(stringx, i); i -= deltaY; - DrawString("clear"); - - for (k = 0; LogicOpModes[k].name; k++) { - glRasterPos2f(stringx, i); - i -= deltaY; - DrawString(LogicOpModes[k].name); - } - - i = windH - deltaY; - x1 = windW/4; - x2 = 3 * windW/4; - xleft = 5 + windW/4; - xright = 5 + windW/2; - - /* Draw foreground color for comparison */ - glColor3f(0.9, 0.2, 0.8); - glRectf(x1, i, x2, i+deltaY); - - /* Leave one rectangle of background color */ - - /* Begin test cases */ - glEnable(GL_BLEND); - glBlendFunc(GL_ONE, GL_ONE); - - i -= 2*deltaY; - glBlendEquationEXT(GL_MIN_EXT); - glRectf(x1, i, x2, i+deltaY); - - i -= deltaY; - glBlendEquationEXT(GL_MAX_EXT); - glRectf(x1, i, x2, i+deltaY); - - i -= deltaY; - glBlendEquationEXT(GL_FUNC_SUBTRACT_EXT); - glRectf(x1, i, x2, i+deltaY); - - i -= deltaY; - glBlendEquationEXT(GL_FUNC_REVERSE_SUBTRACT_EXT); - glRectf(x1, i, x2, i+deltaY); - - glBlendFunc(GL_ONE, GL_ZERO); - i -= deltaY; - if (!use11ops) - glBlendEquationEXT(GL_LOGIC_OP); - else - glEnable(GL_COLOR_LOGIC_OP); - glLogicOp(GL_CLEAR); - glRectf(x1, i, x2, i+deltaY); - - for (k = 0; LogicOpModes[k].name; k++) { - i -= deltaY; - glLogicOp(LogicOpModes[k].mode); - glRectf(x1, i, x2, i+deltaY); - if (LogicOpModes[k].mode == GL_XOR) { - glRectf(x1, i+10, x2, i+5); - } - } - - if (doPrint) { - glDisable(GL_BLEND); - if (supportlogops & 2) - glDisable(GL_COLOR_LOGIC_OP); - glColor3f(1.0, 1.0, 1.0); - PrintColorStrings(); - } - glFlush(); - - if (doubleBuffer) { - glutSwapBuffers(); - } - -} - -static GLenum Args(int argc, char **argv) -{ - GLint i; - - doubleBuffer = GL_FALSE; - - for (i = 1; i < argc; i++) { - 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) -{ - GLenum type; - char *s; - char *extName1 = "GL_EXT_blend_logic_op"; - char *extName2 = "GL_EXT_blend_minmax"; - char *extName3 = "GL_EXT_blend_subtract"; - char *version; - - glutInit(&argc, argv); - - if (Args(argc, argv) == GL_FALSE) { - exit(1); - } - - glutInitWindowPosition(0, 0); glutInitWindowSize( 800, 520); - - type = GLUT_RGB; - type |= (doubleBuffer) ? GLUT_DOUBLE : GLUT_SINGLE; - glutInitDisplayMode(type); - - if (glutCreateWindow("Blend Equation") == GL_FALSE) { - exit(1); - } - - glewInit(); - - /* Make sure blend_logic_op extension is there. */ - s = (char *) glGetString(GL_EXTENSIONS); - version = (char*) glGetString(GL_VERSION); - if (!s) - exit(1); - if (strstr(s,extName1)) { - supportlogops = 1; - use11ops = 0; - printf("blend_logic_op extension available.\n"); - } - if (strncmp(version,"1.1",3)>=0) { - supportlogops += 2; - use11ops = 1; - printf("1.1 color logic ops available.\n"); - } - if (supportlogops == 0) { - printf("Blend_logic_op extension and GL 1.1 not present.\n"); - exit(1); - } - if (strstr(s,extName2) == 0) { - printf("Blend_minmax extension is not present.\n"); - exit(1); - } - if (strstr(s,extName3) == 0) { - printf("Blend_subtract extension is not present.\n"); - exit(1); - } - - Init(); - - glutReshapeFunc(Reshape); - glutKeyboardFunc(Key); - glutDisplayFunc(Draw); - glutMainLoop(); - return 0; -} |