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Shinovon
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306
vendor/librw/src/gl/gl3immed.cpp
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306
vendor/librw/src/gl/gl3immed.cpp
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <assert.h>
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#include "../rwbase.h"
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#include "../rwerror.h"
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#include "../rwplg.h"
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#include "../rwrender.h"
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#include "../rwpipeline.h"
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#include "../rwobjects.h"
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#include "../rwengine.h"
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#ifdef RW_OPENGL
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#include "rwgl3.h"
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#include "rwgl3impl.h"
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#include "rwgl3shader.h"
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namespace rw {
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namespace gl3 {
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uint32 im2DVbo, im2DIbo;
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#ifdef RW_GL_USE_VAOS
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uint32 im2DVao;
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#endif
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Shader *im2dOverrideShader;
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static int32 u_xform;
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#define STARTINDICES 10000
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#define STARTVERTICES 10000
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static Shader *im2dShader;
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static AttribDesc im2dattribDesc[3] = {
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{ ATTRIB_POS, GL_FLOAT, GL_FALSE, 4,
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sizeof(Im2DVertex), 0 },
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{ ATTRIB_COLOR, GL_UNSIGNED_BYTE, GL_TRUE, 4,
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sizeof(Im2DVertex), offsetof(Im2DVertex, r) },
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{ ATTRIB_TEXCOORDS0, GL_FLOAT, GL_FALSE, 2,
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sizeof(Im2DVertex), offsetof(Im2DVertex, u) },
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};
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static int primTypeMap[] = {
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GL_POINTS, // invalid
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GL_LINES,
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GL_LINE_STRIP,
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GL_TRIANGLES,
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GL_TRIANGLE_STRIP,
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GL_TRIANGLE_FAN,
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GL_POINTS
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};
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void
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openIm2D(void)
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{
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// must already be registered by device. we just need the value
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u_xform = registerUniform("u_xform", UNIFORM_VEC4);
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#include "shaders/im2d_gl.inc"
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#include "shaders/simple_fs_gl.inc"
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const char *vs[] = { shaderDecl, header_vert_src, im2d_vert_src, nil };
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const char *fs[] = { shaderDecl, header_frag_src, simple_frag_src, nil };
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im2dShader = Shader::create(vs, fs);
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assert(im2dShader);
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glGenBuffers(1, &im2DIbo);
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glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, im2DIbo);
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glBufferData(GL_ELEMENT_ARRAY_BUFFER, STARTINDICES*2, nil, GL_STREAM_DRAW);
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glGenBuffers(1, &im2DVbo);
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glBindBuffer(GL_ARRAY_BUFFER, im2DVbo);
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glBufferData(GL_ARRAY_BUFFER, STARTVERTICES*sizeof(Im2DVertex), nil, GL_STREAM_DRAW);
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#ifdef RW_GL_USE_VAOS
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glGenVertexArrays(1, &im2DVao);
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glBindVertexArray(im2DVao);
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setAttribPointers(im2dattribDesc, 3);
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#endif
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}
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void
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closeIm2D(void)
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{
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glDeleteBuffers(1, &im2DIbo);
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glDeleteBuffers(1, &im2DVbo);
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#ifdef RW_GL_USE_VAOS
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glDeleteVertexArrays(1, &im2DVao);
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#endif
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im2dShader->destroy();
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im2dShader = nil;
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}
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static Im2DVertex tmpprimbuf[3];
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void
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im2DRenderLine(void *vertices, int32 numVertices, int32 vert1, int32 vert2)
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{
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Im2DVertex *verts = (Im2DVertex*)vertices;
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tmpprimbuf[0] = verts[vert1];
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tmpprimbuf[1] = verts[vert2];
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im2DRenderPrimitive(PRIMTYPELINELIST, tmpprimbuf, 2);
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}
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void
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im2DRenderTriangle(void *vertices, int32 numVertices, int32 vert1, int32 vert2, int32 vert3)
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{
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Im2DVertex *verts = (Im2DVertex*)vertices;
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tmpprimbuf[0] = verts[vert1];
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tmpprimbuf[1] = verts[vert2];
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tmpprimbuf[2] = verts[vert3];
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im2DRenderPrimitive(PRIMTYPETRILIST, tmpprimbuf, 3);
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}
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void
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im2DSetXform(void)
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{
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GLfloat xform[4];
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Camera *cam;
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cam = (Camera*)engine->currentCamera;
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xform[0] = 2.0f/cam->frameBuffer->width;
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xform[1] = -2.0f/cam->frameBuffer->height;
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xform[2] = -1.0f;
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xform[3] = 1.0f;
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setUniform(u_xform, xform);
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// glUniform4fv(currentShader->uniformLocations[u_xform], 1, xform);
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}
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void
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im2DRenderPrimitive(PrimitiveType primType, void *vertices, int32 numVertices)
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{
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#ifdef RW_GL_USE_VAOS
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glBindVertexArray(im2DVao);
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#endif
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glBindBuffer(GL_ARRAY_BUFFER, im2DVbo);
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glBufferData(GL_ARRAY_BUFFER, STARTVERTICES*sizeof(Im2DVertex), nil, GL_STREAM_DRAW);
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glBufferSubData(GL_ARRAY_BUFFER, 0, numVertices*sizeof(Im2DVertex), vertices);
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if(im2dOverrideShader)
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im2dOverrideShader->use();
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else
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im2dShader->use();
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#ifndef RW_GL_USE_VAOS
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setAttribPointers(im2dattribDesc, 3);
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#endif
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im2DSetXform();
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flushCache();
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glDrawArrays(primTypeMap[primType], 0, numVertices);
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#ifndef RW_GL_USE_VAOS
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disableAttribPointers(im2dattribDesc, 3);
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#endif
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}
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void
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im2DRenderIndexedPrimitive(PrimitiveType primType,
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void *vertices, int32 numVertices,
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void *indices, int32 numIndices)
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{
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#ifdef RW_GL_USE_VAOS
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glBindVertexArray(im2DVao);
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#endif
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glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, im2DIbo);
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glBufferData(GL_ELEMENT_ARRAY_BUFFER, STARTINDICES*2, nil, GL_STREAM_DRAW);
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glBufferSubData(GL_ELEMENT_ARRAY_BUFFER, 0, numIndices*2, indices);
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glBindBuffer(GL_ARRAY_BUFFER, im2DVbo);
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glBufferData(GL_ARRAY_BUFFER, STARTVERTICES*sizeof(Im2DVertex), nil, GL_STREAM_DRAW);
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glBufferSubData(GL_ARRAY_BUFFER, 0, numVertices*sizeof(Im2DVertex), vertices);
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if(im2dOverrideShader)
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im2dOverrideShader->use();
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else
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im2dShader->use();
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#ifndef RW_GL_USE_VAOS
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setAttribPointers(im2dattribDesc, 3);
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#endif
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im2DSetXform();
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flushCache();
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glDrawElements(primTypeMap[primType], numIndices,
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GL_UNSIGNED_SHORT, nil);
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#ifndef RW_GL_USE_VAOS
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disableAttribPointers(im2dattribDesc, 3);
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#endif
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}
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// Im3D
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static Shader *im3dShader;
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static AttribDesc im3dattribDesc[3] = {
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{ ATTRIB_POS, GL_FLOAT, GL_FALSE, 3,
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sizeof(Im3DVertex), 0 },
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{ ATTRIB_COLOR, GL_UNSIGNED_BYTE, GL_TRUE, 4,
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sizeof(Im3DVertex), offsetof(Im3DVertex, r) },
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{ ATTRIB_TEXCOORDS0, GL_FLOAT, GL_FALSE, 2,
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sizeof(Im3DVertex), offsetof(Im3DVertex, u) },
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};
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static uint32 im3DVbo, im3DIbo;
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#ifdef RW_GL_USE_VAOS
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static uint32 im3DVao;
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#endif
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static int32 num3DVertices; // not actually needed here
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void
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openIm3D(void)
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{
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#include "shaders/im3d_gl.inc"
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#include "shaders/simple_fs_gl.inc"
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const char *vs[] = { shaderDecl, header_vert_src, im3d_vert_src, nil };
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const char *fs[] = { shaderDecl, header_frag_src, simple_frag_src, nil };
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im3dShader = Shader::create(vs, fs);
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assert(im3dShader);
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glGenBuffers(1, &im3DIbo);
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glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, im3DIbo);
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glBufferData(GL_ELEMENT_ARRAY_BUFFER, STARTINDICES*2, nil, GL_STREAM_DRAW);
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glGenBuffers(1, &im3DVbo);
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glBindBuffer(GL_ARRAY_BUFFER, im3DVbo);
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glBufferData(GL_ARRAY_BUFFER, STARTVERTICES*sizeof(Im3DVertex), nil, GL_STREAM_DRAW);
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#ifdef RW_GL_USE_VAOS
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glGenVertexArrays(1, &im3DVao);
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glBindVertexArray(im3DVao);
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setAttribPointers(im3dattribDesc, 3);
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#endif
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}
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void
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closeIm3D(void)
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{
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glDeleteBuffers(1, &im3DIbo);
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glDeleteBuffers(1, &im3DVbo);
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#ifdef RW_GL_USE_VAOS
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glDeleteVertexArrays(1, &im3DVao);
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#endif
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im3dShader->destroy();
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im3dShader = nil;
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}
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void
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im3DTransform(void *vertices, int32 numVertices, Matrix *world, uint32 flags)
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{
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if(world == nil){
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static Matrix ident;
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ident.setIdentity();
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world = &ident;
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}
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setWorldMatrix(world);
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im3dShader->use();
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if((flags & im3d::VERTEXUV) == 0)
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SetRenderStatePtr(TEXTURERASTER, nil);
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#ifdef RW_GL_USE_VAOS
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glBindVertexArray(im2DVao);
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#endif
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glBindBuffer(GL_ARRAY_BUFFER, im3DVbo);
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glBufferData(GL_ARRAY_BUFFER, STARTVERTICES*sizeof(Im3DVertex), nil, GL_STREAM_DRAW);
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glBufferSubData(GL_ARRAY_BUFFER, 0, numVertices*sizeof(Im3DVertex), vertices);
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#ifndef RW_GL_USE_VAOS
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setAttribPointers(im3dattribDesc, 3);
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#endif
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num3DVertices = numVertices;
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}
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void
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im3DRenderPrimitive(PrimitiveType primType)
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{
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glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, im3DIbo);
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flushCache();
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glDrawArrays(primTypeMap[primType], 0, num3DVertices);
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}
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void
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im3DRenderIndexedPrimitive(PrimitiveType primType, void *indices, int32 numIndices)
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{
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glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, im3DIbo);
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glBufferData(GL_ELEMENT_ARRAY_BUFFER, STARTINDICES*2, nil, GL_STREAM_DRAW);
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glBufferSubData(GL_ELEMENT_ARRAY_BUFFER, 0, numIndices*2, indices);
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flushCache();
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glDrawElements(primTypeMap[primType], numIndices,
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GL_UNSIGNED_SHORT, nil);
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}
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void
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im3DEnd(void)
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{
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#ifndef RW_GL_USE_VAOS
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disableAttribPointers(im3dattribDesc, 3);
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#endif
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}
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}
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}
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#endif
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