fries/dreamcast-opengl
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Make some Dreamcast OpenGL programs.

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This commit is contained in:
Fries 2024-03-10 21:39:58 -07:00
commit 4d4582831c
9 changed files with 243 additions and 0 deletions
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2
.gitignore vendored Normal file
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/.cache
/build

4
.vscode/kos_environ.sh vendored Normal file
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#!/bin/bash
#set the KOS environtment variables
source /opt/toolchains/dc/kos/environ.sh

8
.vscode/kos_make.sh vendored Normal file
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#!/bin/bash
#set the KOS environtment variables
source /opt/toolchains/dc/kos/environ.sh
make
exit

23
.vscode/settings.json vendored Normal file
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{
"C_Cpp.default.includePath": [
"${workspaceFolder}/**",
"/opt/toolchains/dc/kos/**",
"/opt/toolchains/dc/kos-ports/**"
],
"C_Cpp.default.defines": [
"_arch_dreamcast"
],
"C_Cpp.default.compilerPath": "/opt/toolchains/dc/sh-elf/bin/sh-elf-gcc",
"C_Cpp.default.cStandard": "c11",
"C_Cpp.default.cppStandard": "c++17",
"C_Cpp.default.intelliSenseMode": "",
"terminal.integrated.defaultProfile.linux": "kos-bash",
"terminal.integrated.profiles.linux": {
"kos-bash": {
"path": "/usr/bin/bash",
"args": ["--init-file", "${workspaceFolder}/.vscode/kos_environ.sh" ],
"overrideName": true
}
}
}

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.vscode/tasks.json vendored Normal file
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{
"version": "2.0.0",
"tasks": [
{
"label": "Build",
"type": "process",
"command": "bash",
"args": [
"--init-file", "${workspaceFolder}/.vscode/kos_make.sh"
],
"group": {
"kind": "build",
"isDefault": true
},
},
]
}

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dreamcast-cross-file.txt Normal file
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[binaries]
c = 'kos-cc'
cpp = 'kos-c++'
ar = 'kos-ar'
strip = 'kos-strip'
[properties]
sizeof_int = 4
sizeof_wchar_t = 4
sizeof_void* = 4
alignment_char = 1
alignment_void* = 4
alignment_double = 4
has_function_printf = true
sys_root = '/opt/toolchains/dc/sh-elf/'
[built-in options]
c_args = ['-D_arch_dreamcast', '-D_arch_sub_pristine', '-ml', '-m4-single-only', '-ffunction-sections', '-fdata-sections', '-s', '-fno-builtin', '-fno-stack-protector' ]
[host_machine]
system = 'dreamcast'
cpu_family = 'sh4'
cpu = 'sh4'
endian = 'little'

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gl.c Normal file
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#include <kos.h>
#include <stdio.h>
#include <GL/gl.h>
#include <GL/glu.h>
#include <GL/glkos.h>
#include <sys/time.h>
float angle = 0;
float deltaTime = 1.0/60.0;
const float microSecond = 0.000001f;
float speed = 5.0f;
void initScreen() {
glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
glOrtho(0.0, 1.0, 0.0, 1.0, -1.0, 1.0);
}
void displayStuff() {
glClear(GL_COLOR_BUFFER_BIT);
glPushMatrix();
glRotatef(angle, 0, 0, 1);
glColor3f(1.0f, 1.0f, 1.0f);
glBegin(GL_POLYGON);
glVertex3f(0.25f, 0.25f, 0.0f);
glVertex3f(0.75f, 0.25f, 0.0f);
glVertex3f(0.75f, 0.75f, 0.0f);
glVertex3f(0.25f, 0.75f, 0.0f);
glEnd();
glPopMatrix();
// glFlush();
glKosSwapBuffers();
}
void process_input() {
maple_device_t *controller;
cont_state_t *controller_state;
controller = maple_enum_type(0, MAPLE_FUNC_CONTROLLER);
if (controller) {
controller_state = (cont_state_t *)maple_dev_status(controller);
if (!controller_state) {
printf("An error has occured while trying to read the controller.\n");
}
if (controller_state->buttons & CONT_DPAD_RIGHT) {
speed += 1.0f;
} else if (controller_state->buttons & CONT_DPAD_LEFT) {
speed -= 1.0f;
}
if (speed < 1.0f) {
speed = 1.0f;
}
angle += (controller_state->joyx / 127.0f) * deltaTime * speed;
}
}
int main() {
glKosInit();
initScreen();
printf("GL_VENDOR: %s\n", glGetString(GL_VENDOR));
printf("GL_RENDERER: %s\n", glGetString(GL_RENDERER));
printf("GL_VERSION: %s\n", glGetString(GL_VERSION));
printf("GL_EXTENSIONS: %s\n", glGetString(GL_EXTENSIONS));
struct timeval beginningOfFrame, endOfFrame;
while (1) {
gettimeofday(&beginningOfFrame, 0);
process_input();
displayStuff();
gettimeofday(&endOfFrame, 0);
float time = ((float)(endOfFrame.tv_usec) * microSecond) - ((float)(beginningOfFrame.tv_usec) * microSecond);
if (time > 0.0f) {
deltaTime = time;
}
}
}

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hello.c Normal file
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#include <kos.h>
#include <GL/gl.h>
#include <GL/glu.h>
#include <GL/glkos.h>
void triangle() {
// glClearColor(1.0f, 1.0f, 0.0f, 0.0f);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glBegin(GL_TRIANGLES);
glColor3f(1.0f, 0.0f, 0.0f);
glVertex3f(-1.0f, -1.0f, 0.0f);
glColor3f(0.0f, 1.0f, 0.0f);
glVertex3f(0.0f, 1.0f, 0.0f);
glColor3f(0.0f, 0.0f, 1.0f);
glVertex3f(1.0f, -1.0f, 0.0f);
glEnd();
}
int main(int argc, char *argv[]) {
maple_device_t *controller;
glKosInit();
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
glOrtho(0.0, 1.0, 0.0, 1.0, -1.0, 1.0);
// gluPerspective(45.0f, 640.0f/480.0f, 0.1f, 100.0f);
// glMatrixMode(GL_MODELVIEW);
// glEnable(GL_TEXTURE_2D);
// glEnable(GL_DEPTH_TEST);
// glFrontFace(GL_CW);
// glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
glClearColor(0.3f, 0.4f, 0.5f, 1.0f);
while (1) {
// glLoadIdentity();
// glTranslatef(-5.0f, 0.0f, 0.0f);
// glEnable(GL_CULL_FACE);
triangle();
glKosSwapBuffers();
}
return 0;
}

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project('dreamcast-opengl', 'c')
cc = meson.get_compiler('c')
kosinc = include_directories('/opt/toolchains/dc/kos/include')
koskernelinc = include_directories('/opt/toolchains/dc/kos/kernel/arch/dreamcast/include')
kosaddonsinc = include_directories('/opt/toolchains/dc/kos/addons/include')
kosportsinc = include_directories('/opt/toolchains/dc/kos-ports/include')
GL = cc.find_library('GL', required: true)
math = cc.find_library('m', required: true)
# pcx = cc.find_library('pcx', required: true)
# kosutils = cc.find_library('kosutils', required: true)
deps = [
GL,
math
]
incdirs = [
kosinc,
koskernelinc,
kosaddonsinc,
kosportsinc
]
executable('hello.elf', ['hello.c'], dependencies: deps, include_directories: incdirs)
executable('gl.elf', ['gl.c'], dependencies: deps, include_directories: incdirs)