143 lines
4.2 KiB
C++
143 lines
4.2 KiB
C++
#include <stdlib.h>
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#include "org_lwjgl_opengl_Pbuffer.h"
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#include "extgl.h"
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#include "Window.h"
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typedef struct _PbufferInfo {
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GLXPbuffer buffer;
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GLXContext context;
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} PbufferInfo;
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/*
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* Class: org_lwjgl_opengl_Pbuffer
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* Method: nIsBufferLost
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* Signature: (I)Z
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*/
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JNIEXPORT jboolean JNICALL Java_org_lwjgl_opengl_Pbuffer_nIsBufferLost
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(JNIEnv *env, jclass clazz, jint handle)
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{
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// The buffer is never lost, because of the GLX_PRESERVED_CONTENTS flag
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return JNI_FALSE;
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}
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/*
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* Class: org_lwjgl_opengl_Pbuffer
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* Method: isPbufferSupported
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* Signature: ()Z
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*/
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JNIEXPORT jint JNICALL Java_org_lwjgl_opengl_Pbuffer_getPbufferCaps
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(JNIEnv *env, jclass clazz)
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{
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// Only support thw GLX 1.3 Pbuffers and ignore the GLX_SGIX_pbuffer extension
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return extgl_Extensions.GLX13 ? org_lwjgl_opengl_Pbuffer_PBUFFER_SUPPORTED : 0;
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}
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/*
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* Class: org_lwjgl_opengl_Pbuffer
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* Method: nCreate
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* Signature: (IIII)I
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*/
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JNIEXPORT jint JNICALL Java_org_lwjgl_opengl_Pbuffer_nCreate
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(JNIEnv *env, jclass clazz, jint width, jint height, jint bpp, jint alpha, jint depth, jint stencil)
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{
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int bpe = convertToBPE(bpp);
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const int attrib_list[] = {GLX_RENDER_TYPE, GLX_RGBA_BIT,
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GLX_DOUBLEBUFFER, False,
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GLX_RED_SIZE, bpe,
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GLX_GREEN_SIZE, bpe,
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GLX_BLUE_SIZE, bpe,
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GLX_ALPHA_SIZE, alpha,
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GLX_DEPTH_SIZE, depth,
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GLX_STENCIL_SIZE, stencil,
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GLX_DRAWABLE_TYPE, GLX_PBUFFER_BIT,
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None};
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int num_configs;
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GLXFBConfig *configs = glXChooseFBConfig(getCurrentDisplay(), getCurrentScreen(), attrib_list, &num_configs);
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if (num_configs == 0) {
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XFree(configs);
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throwException(env, "No matching pixel format");
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return -1;
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}
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int max;
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glXGetFBConfigAttrib(getCurrentDisplay(), configs[0], GLX_MAX_PBUFFER_WIDTH, &max);
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if (max < width) {
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XFree(configs);
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throwException(env, "Width too large");
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return -1;
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}
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glXGetFBConfigAttrib(getCurrentDisplay(), configs[0], GLX_MAX_PBUFFER_HEIGHT, &max);
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if (max < height) {
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XFree(configs);
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throwException(env, "Height too large");
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return -1;
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}
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GLXContext context = glXCreateNewContext(getCurrentDisplay(), configs[0], GLX_RGBA_TYPE, getCurrentContext(), True);
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if (context == NULL) {
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XFree(configs);
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throwException(env, "Could not create a GLX context");
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return false;
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}
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if (glXIsDirect(getCurrentDisplay(), context) == False) {
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glXDestroyContext(getCurrentDisplay(), context);
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XFree(configs);
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throwException(env, "Could not create a direct GLX context");
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return false;
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}
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const int buffer_attribs[] = {GLX_PBUFFER_WIDTH, width,
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GLX_PBUFFER_HEIGHT, height,
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GLX_PRESERVED_CONTENTS, True,
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GLX_LARGEST_PBUFFER, False};
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GLXPbuffer buffer = glXCreatePbuffer(getCurrentDisplay(), configs[0], buffer_attribs);
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XFree(configs);
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PbufferInfo *buffer_info = (PbufferInfo *)malloc(sizeof(PbufferInfo));
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buffer_info->buffer = buffer;
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buffer_info->context = context;
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return (jint)buffer_info;
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}
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/*
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* Class: org_lwjgl_opengl_Pbuffer
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* Method: nReleaseContext
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* Signature: ()V
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*/
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JNIEXPORT void JNICALL Java_org_lwjgl_opengl_Pbuffer_nReleaseContext
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(JNIEnv *env, jclass clazz)
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{
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makeCurrent();
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}
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/*
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* Class: org_lwjgl_opengl_Pbuffer
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* Method: nMakeCurrent
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* Signature: (I)V
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*/
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JNIEXPORT void JNICALL Java_org_lwjgl_opengl_Pbuffer_nMakeCurrent
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(JNIEnv *env, jclass clazz, jint handle)
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{
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PbufferInfo *buffer_info = (PbufferInfo *)handle;
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GLXPbuffer buffer = buffer_info->buffer;
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GLXContext context = buffer_info->context;
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if (glXMakeContextCurrent(getCurrentDisplay(), buffer, buffer, context) == False) {
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#ifdef _DEBUG
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printf("Could not make pbuffer current");
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#endif
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}
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}
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/*
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* Class: org_lwjgl_opengl_Pbuffer
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* Method: nDestroyGL
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* Signature: (I)V
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*/
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JNIEXPORT void JNICALL Java_org_lwjgl_opengl_Pbuffer_nDestroy
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(JNIEnv *env, jclass clazz, jint handle)
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{
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PbufferInfo *buffer_info = (PbufferInfo *)handle;
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GLXPbuffer buffer = buffer_info->buffer;
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GLXContext context = buffer_info->context;
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glXDestroyPbuffer(getCurrentDisplay(), buffer);
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glXDestroyContext(getCurrentDisplay(), context);
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free(buffer_info);
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}
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