From ba4fde3975145f0293ffd8b1512ea9de7cca1cac Mon Sep 17 00:00:00 2001 From: Luke Benstead Date: Sun, 3 Mar 2019 19:41:19 +0000 Subject: [PATCH] Fix depth funcs --- GL/state.c | 8 +-- samples/Makefile | 1 + samples/depth_funcs/Makefile | 29 ++++++++ samples/depth_funcs/main.c | 95 +++++++++++++++++++++++++ samples/depth_funcs/romdisk/PLACEHOLDER | 0 5 files changed, 129 insertions(+), 4 deletions(-) create mode 100644 samples/depth_funcs/Makefile create mode 100644 samples/depth_funcs/main.c create mode 100644 samples/depth_funcs/romdisk/PLACEHOLDER diff --git a/GL/state.c b/GL/state.c index 32d4b22..2ab0cb3 100644 --- a/GL/state.c +++ b/GL/state.c @@ -58,17 +58,17 @@ static int _calc_pvr_depth_test() { case GL_NEVER: return PVR_DEPTHCMP_NEVER; case GL_LESS: - return PVR_DEPTHCMP_GEQUAL; + return PVR_DEPTHCMP_GREATER; case GL_EQUAL: return PVR_DEPTHCMP_EQUAL; case GL_LEQUAL: - return PVR_DEPTHCMP_GREATER; + return PVR_DEPTHCMP_GEQUAL; case GL_GREATER: - return PVR_DEPTHCMP_LEQUAL; + return PVR_DEPTHCMP_LESS; case GL_NOTEQUAL: return PVR_DEPTHCMP_NOTEQUAL; case GL_GEQUAL: - return PVR_DEPTHCMP_LESS; + return PVR_DEPTHCMP_LEQUAL; break; case GL_ALWAYS: default: diff --git a/samples/Makefile b/samples/Makefile index f1ae938..5c44e34 100644 --- a/samples/Makefile +++ b/samples/Makefile @@ -23,3 +23,4 @@ all: $(KOS_MAKE) -C trimark all $(KOS_MAKE) -C multitexture_arrays all $(KOS_MAKE) -C paletted all + $(KOS_MAKE) -C depth_funcs all diff --git a/samples/depth_funcs/Makefile b/samples/depth_funcs/Makefile new file mode 100644 index 0000000..189a9f7 --- /dev/null +++ b/samples/depth_funcs/Makefile @@ -0,0 +1,29 @@ +TARGET = depth_funcs.elf +OBJS = main.o + +all: rm-elf $(TARGET) + +include $(KOS_BASE)/Makefile.rules + +clean: + -rm -f $(TARGET) $(OBJS) romdisk.* + +rm-elf: + -rm -f $(TARGET) romdisk.* + +$(TARGET): $(OBJS) romdisk.o + $(KOS_CC) $(KOS_CFLAGS) $(KOS_LDFLAGS) -o $(TARGET) $(KOS_START) \ + $(OBJS) romdisk.o $(OBJEXTRA) -lm -lkosutils $(KOS_LIBS) + +romdisk.img: + $(KOS_GENROMFS) -f romdisk.img -d romdisk -v + +romdisk.o: romdisk.img + $(KOS_BASE)/utils/bin2o/bin2o romdisk.img romdisk romdisk.o + +run: $(TARGET) + $(KOS_LOADER) $(TARGET) + +dist: + rm -f $(OBJS) romdisk.o romdisk.img + $(KOS_STRIP) $(TARGET) diff --git a/samples/depth_funcs/main.c b/samples/depth_funcs/main.c new file mode 100644 index 0000000..acf1952 --- /dev/null +++ b/samples/depth_funcs/main.c @@ -0,0 +1,95 @@ +#include "gl.h" +#include "glu.h" +#include "glkos.h" + +/* A general OpenGL initialization function. Sets all of the initial parameters. */ +void InitGL(int Width, int Height) // We call this right after our OpenGL window is created. +{ + glClearColor(0.0f, 0.0f, 0.0f, 0.0f); // This Will Clear The Background Color To Black + glClearDepth(1.0); // Enables Clearing Of The Depth Buffer + glDepthFunc(GL_LESS); // The Type Of Depth Test To Do + glEnable(GL_DEPTH_TEST); // Enables Depth Testing + glShadeModel(GL_SMOOTH); // Enables Smooth Color Shading + + glMatrixMode(GL_PROJECTION); + glLoadIdentity(); // Reset The Projection Matrix + + gluPerspective(45.0f,(GLfloat)Width/(GLfloat)Height,0.1f,100.0f); // Calculate The Aspect Ratio Of The Window + + glMatrixMode(GL_MODELVIEW); +} + +/* The function called when our window is resized (which shouldn't happen, because we're fullscreen) */ +void ReSizeGLScene(int Width, int Height) +{ + if (Height == 0) // Prevent A Divide By Zero If The Window Is Too Small + Height = 1; + + glViewport(0, 0, Width, Height); // Reset The Current Viewport And Perspective Transformation + + glMatrixMode(GL_PROJECTION); + glLoadIdentity(); + + gluPerspective(45.0f,(GLfloat)Width/(GLfloat)Height,0.1f,100.0f); + glMatrixMode(GL_MODELVIEW); +} + + +void DrawSquare(float width, float r, float g, float b, float z) { + width /= 2; + + glColor3f(r, g, b); + glBegin(GL_QUADS); // start drawing a polygon (4 sided) + glVertex3f(-width, width, z); // Top Left + glVertex3f( width, width, z); // Top Right + glVertex3f( width,-width, z); // Bottom Right + glVertex3f(-width,-width, z); // Bottom Left + glEnd(); // done with the polygon +} + +/* The main drawing function. */ +void DrawGLScene() +{ + glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); // Clear The Screen And The Depth Buffer + glLoadIdentity(); // Reset The View + + glDepthFunc(GL_ALWAYS); + DrawSquare(100, 1, 1, 1, -5.0f); + + glTranslatef(-2.0, 1.5, 0.0f); + glDepthFunc(GL_LEQUAL); + DrawSquare(1.0, 1, 0, 0, -5.0f); + + glTranslatef(1.1, 0, 0); + glDepthFunc(GL_EQUAL); + DrawSquare(1.0, 1, 0, 0, -5.0f); + + glTranslatef(1.1, 0, 0); + glDepthFunc(GL_GEQUAL); + DrawSquare(1.0, 1, 0, 0, -5.0f); + + glTranslatef(1.1, 0, 0); + glDepthFunc(GL_LESS); + DrawSquare(1.0, 1, 0, 0, -4.9f); + + glTranslatef(1.1, 0, 0); + glDepthFunc(GL_GREATER); + DrawSquare(1.0, 1, 0, 0, -5.1f); + + // swap buffers to display, since we're double buffered. + glKosSwapBuffers(); +} + +int main(int argc, char **argv) +{ + glKosInit(); + + InitGL(640, 480); + ReSizeGLScene(640, 480); + + while(1) { + DrawGLScene(); + } + + return 0; +} diff --git a/samples/depth_funcs/romdisk/PLACEHOLDER b/samples/depth_funcs/romdisk/PLACEHOLDER new file mode 100644 index 0000000..e69de29