mirror of
https://github.com/quelsolaar/MergeSource
synced 2025-02-08 11:08:41 -05:00
179 lines
9.4 KiB
C
179 lines
9.4 KiB
C
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#include <windows.h>
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#include <GL/glu.h>
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#include <stdio.h>
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#include <math.h>
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#include "forge.h"
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#include "betray_plugin_api.h"
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#define GL_RENDERBUFFER_EXT 0x8D41
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#define GL_DEPTH24_STENCIL8_EXT 0x88F0
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#define GL_FRAMEBUFFER_EXT 0x8D40
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#define GL_COLOR_ATTACHMENT0_EXT 0x8CE0
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#define GL_DEPTH_ATTACHMENT_EXT 0x8D00
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#define GL_FRAMEBUFFER_COMPLETE_EXT 0x8CD5
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typedef unsigned int GLhandleARB;
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void *(*betray_plugin_open_vr_gl_GetProcAddress)(const char* proc) = NULL;
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void (APIENTRY *plug_glFramebufferRenderbufferEXT)(GLenum target, GLenum attachment, GLenum renderbuffertarget, GLuint renderbuffer) = NULL;
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void (APIENTRY *plug_glGenRenderbuffersEXT)(GLsizei n, GLuint *renderbuffers) = NULL;
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void (APIENTRY *plug_glBindRenderbufferEXT)(GLenum target, GLuint renderbuffer) = NULL;
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void (APIENTRY *plug_glRenderbufferStorageEXT)(GLenum target, GLenum internalformat, GLsizei width, GLsizei height) = NULL;
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void (APIENTRY *plug_glGenFramebuffersEXT)(GLsizei n, GLuint *framebuffers) = NULL;
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void (APIENTRY *plug_glBindFramebufferEXT)(GLenum target, GLuint framebuffer) = NULL;
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void (APIENTRY *plug_glFramebufferTexture2DEXT)(GLenum target, GLenum attachment, GLenum textarget, GLuint texture, GLint level) = NULL;
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GLenum(APIENTRY *plug_glCheckFramebufferStatusEXT)(GLenum target) = NULL;
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GLhandleARB (APIENTRY *plug_glCreateShaderObjectARB)(GLenum shaderType);
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GLhandleARB (APIENTRY *plug_glCreateProgramObjectARB)(GLvoid);
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GLvoid (APIENTRY *plug_glAttachObjectARB)(GLhandleARB containerObj, GLhandleARB obj);
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GLvoid (APIENTRY *plug_glShaderSourceARB)(GLhandleARB shaderObj, GLsizei count, const char **string, const GLint *length);
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GLvoid (APIENTRY *plug_glCompileShaderARB)(GLhandleARB shaderObj);
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GLvoid (APIENTRY *plug_glLinkProgramARB)(GLhandleARB programObj);
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GLvoid (APIENTRY *plug_glUseProgramObjectARB)(GLhandleARB programObj);
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GLint (APIENTRY *plug_glGetUniformLocationARB)(GLhandleARB programObj, const char *name);
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GLvoid (APIENTRY *plug_glUniform1fARB)(GLint location, GLfloat v0);
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GLvoid (APIENTRY *plug_glUniform1iARB)(GLint location, GLint i);
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GLvoid (APIENTRY *plug_glUniformMatrix4fvARB)(GLint location, GLsizei count, GLboolean transpose, GLfloat *value);
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GLvoid (APIENTRY *plug_glGetShaderivARB)(GLuint shader, GLenum pname, GLint *params);
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GLvoid (APIENTRY *plug_glEnableVertexAttribArrayARB)(GLuint index);
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GLvoid (APIENTRY *plug_glDisableVertexAttribArrayARB)(GLuint index);
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GLvoid (APIENTRY *plug_glVertexAttribPointerARB)(GLuint index, GLint size, GLenum type, GLboolean normalized, GLsizei stride, const GLvoid * pointer);
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uint plug_texture_ids[2];
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uint plug_framebuffer_ids[2];
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uint plug_texture_resolution[2];
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uint plug_program;
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uint betray_plugin_open_vr_texture_allocate(uint x, uint y)
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{
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uint texture_id;
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glEnable(GL_TEXTURE_2D);
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glGenTextures(1, &texture_id);
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glBindTexture(GL_TEXTURE_2D, texture_id);
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glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, x, y, 0, GL_RGBA, GL_UNSIGNED_BYTE, NULL);
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glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP);
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glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP);
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glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
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glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
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return texture_id;
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}
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uint betray_plugin_open_vr_depth_allocate(uint x, uint y)
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{
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uint texture_id;
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plug_glGenRenderbuffersEXT(1, &texture_id);
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plug_glBindRenderbufferEXT(GL_RENDERBUFFER_EXT, texture_id);
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plug_glRenderbufferStorageEXT(GL_RENDERBUFFER_EXT, GL_DEPTH24_STENCIL8_EXT, x, y);
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return texture_id;
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}
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uint betray_plugin_open_vr_framebuffer_allocate(uint texture_id, uint depth_id)
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{
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uint fbo;
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plug_glGenFramebuffersEXT(1, &fbo);
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plug_glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, fbo);
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plug_glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT, GL_COLOR_ATTACHMENT0_EXT, GL_TEXTURE_2D, texture_id, 0);
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plug_glFramebufferRenderbufferEXT(GL_FRAMEBUFFER_EXT, GL_DEPTH_ATTACHMENT_EXT, GL_RENDERBUFFER_EXT, depth_id);
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if (plug_glCheckFramebufferStatusEXT(GL_FRAMEBUFFER_EXT) != GL_FRAMEBUFFER_COMPLETE_EXT)
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return -1;
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return fbo;
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}
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char *vertex_shader =
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"attribute vec4 vertex;"
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"uniform mat4 ModelViewProjectionMatrix;"
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"varying vec2 mapping;"
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"void main()"
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"{"
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" mapping = vertex.xy * vec2(0.5) + vec2(0.5);"
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" gl_Position = ModelViewProjectionMatrix * vec4(vertex.xyz, 1.0);"
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"}";
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char *fragment_shader =
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"uniform sampler2D image;"
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"varying vec2 mapping;"
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"void main()"
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"{"
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" gl_FragColor = texture2D(image, mapping).rgba;"
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"}";
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#define GL_VERTEX_SHADER_ARB 0x8B31
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#define GL_FRAGMENT_SHADER_ARB 0x8B30
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void betray_plugin_open_vr_opengl_init()
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{
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uint fragment, vertex;
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betray_plugin_open_vr_gl_GetProcAddress = (void*(*)(const char *))betray_plugin_gl_proc_address_get();
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plug_glFramebufferRenderbufferEXT = (void(_stdcall*)(GLenum, GLenum, GLenum, GLuint))betray_plugin_open_vr_gl_GetProcAddress("glFramebufferRenderbufferEXT");
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plug_glGenRenderbuffersEXT = (void(_stdcall*)(GLsizei, GLuint *))betray_plugin_open_vr_gl_GetProcAddress("glGenRenderbuffersEXT");
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plug_glBindRenderbufferEXT = (void(_stdcall*)(GLenum, GLuint))betray_plugin_open_vr_gl_GetProcAddress("glBindRenderbufferEXT");
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plug_glRenderbufferStorageEXT = (void(_stdcall*)(GLenum, GLenum, GLsizei, GLsizei))betray_plugin_open_vr_gl_GetProcAddress("glRenderbufferStorageEXT");
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plug_glGenFramebuffersEXT = (void(_stdcall*)(GLsizei, GLuint*))betray_plugin_open_vr_gl_GetProcAddress("glGenFramebuffersEXT");
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plug_glBindFramebufferEXT = (void(_stdcall*)(GLenum, GLuint))betray_plugin_open_vr_gl_GetProcAddress("glBindFramebufferEXT");
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plug_glFramebufferTexture2DEXT = (void(_stdcall*)(GLenum, GLenum, GLenum, GLuint, GLint))betray_plugin_open_vr_gl_GetProcAddress("glFramebufferTexture2DEXT");
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plug_glCheckFramebufferStatusEXT = (GLenum(_stdcall*)(GLenum))betray_plugin_open_vr_gl_GetProcAddress("glCheckFramebufferStatusEXT");
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plug_glCreateShaderObjectARB = (GLhandleARB(_stdcall*)(GLenum shaderType))betray_plugin_open_vr_gl_GetProcAddress("glCreateShaderObjectARB");
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plug_glCreateProgramObjectARB = (GLhandleARB(_stdcall*)(GLvoid))betray_plugin_open_vr_gl_GetProcAddress("glCreateProgramObjectARB");
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plug_glAttachObjectARB = (GLvoid(_stdcall*)(GLhandleARB containerObj, GLhandleARB obj))betray_plugin_open_vr_gl_GetProcAddress("glAttachObjectARB");
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plug_glShaderSourceARB = (GLvoid(_stdcall*)(GLhandleARB shaderObj, GLsizei count, const char **string, const GLint *length))betray_plugin_open_vr_gl_GetProcAddress("glShaderSourceARB");
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plug_glCompileShaderARB = (GLvoid(_stdcall*)(GLhandleARB shaderObj))betray_plugin_open_vr_gl_GetProcAddress("glCompileShaderARB");
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plug_glLinkProgramARB = (GLvoid(_stdcall*)(GLhandleARB programObj))betray_plugin_open_vr_gl_GetProcAddress("glLinkProgramARB");
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plug_glUseProgramObjectARB =(GLvoid(_stdcall*)(GLhandleARB programObj))betray_plugin_open_vr_gl_GetProcAddress("glUseProgramObjectARB");
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plug_glGetUniformLocationARB = (GLint(_stdcall*)(GLhandleARB programObj, const char *name))betray_plugin_open_vr_gl_GetProcAddress("glGetUniformLocationARB");
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plug_glUniform1fARB = (GLvoid(_stdcall*)(GLint location, GLfloat v0))betray_plugin_open_vr_gl_GetProcAddress("glUniform1fARB");
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plug_glUniform1iARB = (GLvoid(_stdcall*)(GLint location, GLint i))betray_plugin_open_vr_gl_GetProcAddress("glUniform1iARB");
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plug_glUniformMatrix4fvARB = (GLvoid(_stdcall*)(GLint location, GLsizei count, GLboolean transpose, GLfloat *value))betray_plugin_open_vr_gl_GetProcAddress("glUniformMatrix4fvARB");
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plug_glGetShaderivARB = (GLvoid(_stdcall*)(GLuint shader, GLenum pname, GLint *params))betray_plugin_open_vr_gl_GetProcAddress("glGetShaderiv");
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plug_glEnableVertexAttribArrayARB = (GLvoid (_stdcall*)(GLuint index))betray_plugin_open_vr_gl_GetProcAddress("glEnableVertexAttribArrayARB");
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plug_glDisableVertexAttribArrayARB = (GLvoid (_stdcall*)(GLuint index))betray_plugin_open_vr_gl_GetProcAddress("glDisableVertexAttribArrayARB");
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plug_glVertexAttribPointerARB = (GLvoid (_stdcall*)(GLuint index, GLint size, GLenum type, GLboolean normalized, GLsizei stride, const GLvoid * pointer))betray_plugin_open_vr_gl_GetProcAddress("glVertexAttribPointerARB");
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fragment = plug_glCreateShaderObjectARB(GL_FRAGMENT_SHADER_ARB);
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plug_glShaderSourceARB(fragment, 1, &fragment_shader, NULL);
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plug_glCompileShaderARB(fragment);
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vertex = plug_glCreateShaderObjectARB(GL_VERTEX_SHADER_ARB);
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plug_glShaderSourceARB(vertex, 1, &vertex_shader, NULL);
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plug_glCompileShaderARB(vertex);
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plug_program = plug_glCreateProgramObjectARB();
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plug_glAttachObjectARB(plug_program, fragment);
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plug_glAttachObjectARB(plug_program, vertex);
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plug_glLinkProgramARB(plug_program);
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}
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void betray_plugin_open_vr_opengl_draw(uint texture_id)
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{
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float matrix[16] = {1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0, 0, -1.0, 1};
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float array[] = {1, 1, 0, 1,
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-1, 1, 0, 1,
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-1, -1, 0, 1,
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1, 1, 0, 1,
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-1, -1, 0, 1,
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1, -1, 0, 1};
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uint x, y;
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betray_plugin_screen_mode_get(&x, &y, NULL);
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glViewport(0, 0, x, y);
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plug_glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, 0);
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glClear(GL_DEPTH_BUFFER_BIT | GL_COLOR_BUFFER_BIT | GL_STENCIL_BUFFER_BIT);
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plug_glUseProgramObjectARB(plug_program);
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glBindTexture(GL_TEXTURE_2D, texture_id);
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plug_glUniformMatrix4fvARB(plug_glGetUniformLocationARB(plug_program, "ModelViewProjectionMatrix"), 1, FALSE, matrix);
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plug_glEnableVertexAttribArrayARB(0);
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plug_glVertexAttribPointerARB(0, 4, GL_FLOAT, FALSE, 0, array);
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glDrawArrays(GL_TRIANGLES, 0, 6);
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plug_glDisableVertexAttribArrayARB(0);
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plug_glUseProgramObjectARB(0);
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}
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