# HG changeset patch
# User John Tsiombikas <nuclear@member.fsf.org>
# Date 1380887853 -10800
# Node ID 75ab0d4ce2bbecea485544ce5174159c5ee43fad
# Parent  9dc19419f52be3570ad664e322b3721636528261
backed out the shaderless oculus distortion method, as it's completely pointless

diff -r 9dc19419f52b -r 75ab0d4ce2bb oculus1.vcproj
--- a/oculus1.vcproj	Fri Oct 04 14:50:50 2013 +0300
+++ b/oculus1.vcproj	Fri Oct 04 14:57:33 2013 +0300
@@ -553,22 +553,6 @@
 				</File>
 			</Filter>
 		</Filter>
-		<Filter
-			Name="sdr"
-			>
-			<File
-				RelativePath=".\sdr\phong.p.glsl"
-				>
-			</File>
-			<File
-				RelativePath=".\sdr\phong.v.glsl"
-				>
-			</File>
-			<File
-				RelativePath=".\sdr\sdr.glsl"
-				>
-			</File>
-		</Filter>
 	</Files>
 	<Globals>
 	</Globals>
diff -r 9dc19419f52b -r 75ab0d4ce2bb src/main.cc
--- a/src/main.cc	Fri Oct 04 14:50:50 2013 +0300
+++ b/src/main.cc	Fri Oct 04 14:57:33 2013 +0300
@@ -515,13 +515,6 @@
 	case 'f':
 		toggle_fullscreen();
 		break;
-
-	case '\\':
-		{
-			extern bool dbg_enable;
-			dbg_enable = !dbg_enable;
-		}
-		break;
 	}
 
 	keystate[key] = true;
diff -r 9dc19419f52b -r 75ab0d4ce2bb src/vr.cc
--- a/src/vr.cc	Fri Oct 04 14:50:50 2013 +0300
+++ b/src/vr.cc	Fri Oct 04 14:57:33 2013 +0300
@@ -10,40 +10,13 @@
 #include <malloc.h>
 #endif
 
-#define USUB	28
-#define VSUB	40
-
-/* these are just used for the shaderless precomputed distortion method */
-struct Mesh {
-	int prim;
-	int num_verts, num_faces;
-	unsigned int vbo;
-	unsigned int ibo;
-};
-struct Vertex {
-	float x, y, z;
-	float tx, ty;
-};
-
-
 static void init_ctx();
 static bool init_ovr();
 static bool init_sdr();
 
-static Mesh gen_view_mesh(int usub, int vsub, float aspect, float lens_center_offset,
-		float scale, const float *dist_factors, float tex_scale_x, float tex_scale_y);
-static void distort_texcoords(float *tc, float aspect, float lens_center_offset, float scale, const float *dist_factors);
-static float barrel_scale(float rad, const float *k);
-
 VRContext vr_ctx;
 static unsigned int sdrprog;
 
-static Mesh wrapmesh[2];
-static bool mesh_valid;
-
-bool dbg_enable;
-
-
 extern "C" int vr_init(enum vr_init_mode mode)
 {
 	glewInit();
@@ -365,204 +338,49 @@
 		{-1, -1, 0, 1},
 		{0, -1, 1, 1}
 	};
-	static const float quad_trans[3] = {0, -1, 1};
-	static const float quad_scale[3] = {1, 0.5, 0.5};
 	static const float offs_scale[3] = {0.0, -1.0, 1.0};
-	static int prev_tex_scale_x, prev_tex_scale_y;
 
 	glPushAttrib(GL_ENABLE_BIT);
 	glDisable(GL_DEPTH_TEST);
 	glDisable(GL_LIGHTING);
-	glDisable(GL_CULL_FACE);
+	glEnable(GL_TEXTURE_2D);
+
+	glMatrixMode(GL_MODELVIEW);
+	glPushMatrix();
+	glLoadIdentity();
 
 	glMatrixMode(GL_PROJECTION);
 	glPushMatrix();
 	glLoadIdentity();
 
-	glMatrixMode(GL_MODELVIEW);
-	glPushMatrix();
-	glLoadIdentity();
+	glUseProgram(sdrprog);
 
-	if(!dbg_enable) {
-		glUseProgram(sdrprog);
-
-		if(sdrprog) {
-			int loc;
-			if((loc = glGetUniformLocation(sdrprog, "lens_center_offset")) != -1) {
-				float offset = vr_ctx.info.lens_center_offset * offs_scale[eye];
-				glUniform1f(loc, offset);
-			}
-
-			if((loc = glGetUniformLocation(sdrprog, "tex_scale")) != -1) {
-				glUniform2f(loc, tex_scale_x, tex_scale_y);
-			}
+	if(sdrprog) {
+		int loc;
+		if((loc = glGetUniformLocation(sdrprog, "lens_center_offset")) != -1) {
+			float offset = vr_ctx.info.lens_center_offset * offs_scale[eye];
+			glUniform1f(loc, offset);
 		}
 
-		glBindTexture(GL_TEXTURE_2D, tex);
-		glBegin(GL_QUADS);
-		glColor4f(1, 1, 1, 1);
-		glTexCoord2f(0, 0); glVertex2f(rects[eye][0], rects[eye][1]);
-		glTexCoord2f(1, 0); glVertex2f(rects[eye][2], rects[eye][1]);
-		glTexCoord2f(1, 1); glVertex2f(rects[eye][2], rects[eye][3]);
-		glTexCoord2f(0, 1); glVertex2f(rects[eye][0], rects[eye][3]);
-		glEnd();
-
-		glUseProgram(0);
-
-	} else {
-
-		if(!mesh_valid || tex_scale_x != prev_tex_scale_x || tex_scale_y != prev_tex_scale_y) {
-			for(int i=0; i<2; i++) {
-				int eye = i + VR_EYE_LEFT;
-
-				if(wrapmesh[i].vbo) {
-					glDeleteBuffers(1, &wrapmesh[i].vbo);
-				}
-				if(wrapmesh[i].ibo) {
-					glDeleteBuffers(1, &wrapmesh[i].ibo);
-				}
-
-				float aspect = vr_ctx.info.aspect / 2.0;
-				float offset = vr_ctx.info.lens_center_offset * offs_scale[eye];
-				wrapmesh[i] = gen_view_mesh(USUB, VSUB, aspect, offset, vr_ctx.info.scale, vr_ctx.info.distort,
-					tex_scale_x, tex_scale_y);
-			}
-			mesh_valid = true;
-			prev_tex_scale_x = tex_scale_x;
-			prev_tex_scale_y = tex_scale_y;
+		if((loc = glGetUniformLocation(sdrprog, "tex_scale")) != -1) {
+			glUniform2f(loc, tex_scale_x, tex_scale_y);
 		}
-
-		glScalef(quad_scale[eye], 1.0, 1.0);
-		glTranslatef(quad_trans[eye], 0, 0);
-
-		glUseProgram(0);
-		glBindTexture(GL_TEXTURE_2D, tex);
-		glEnable(GL_TEXTURE_2D);
-
-		glColor3f(1, 1, 1);
-
-		glEnableClientState(GL_VERTEX_ARRAY);
-		glEnableClientState(GL_TEXTURE_COORD_ARRAY);
-
-		int meshidx = eye - VR_EYE_LEFT;
-		glBindBuffer(GL_ARRAY_BUFFER, wrapmesh[meshidx].vbo);
-		glVertexPointer(3, GL_FLOAT, sizeof(Vertex), 0);
-		glTexCoordPointer(2, GL_FLOAT, sizeof(Vertex), (void*)offsetof(Vertex, tx));
-
-		glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, wrapmesh[meshidx].ibo);
-		glDrawElements(GL_TRIANGLES, wrapmesh[meshidx].num_faces * 3, GL_UNSIGNED_INT, 0);
-
-		glBindBuffer(GL_ARRAY_BUFFER, 0);
-		glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);
-
-		glDisableClientState(GL_VERTEX_ARRAY);
-		glDisableClientState(GL_TEXTURE_COORD_ARRAY);
 	}
 
-	glMatrixMode(GL_PROJECTION);
+	glBindTexture(GL_TEXTURE_2D, tex);
+	glBegin(GL_QUADS);
+	glColor4f(1, 1, 1, 1);
+	glTexCoord2f(0, 0); glVertex2f(rects[eye][0], rects[eye][1]);
+	glTexCoord2f(1, 0); glVertex2f(rects[eye][2], rects[eye][1]);
+	glTexCoord2f(1, 1); glVertex2f(rects[eye][2], rects[eye][3]);
+	glTexCoord2f(0, 1); glVertex2f(rects[eye][0], rects[eye][3]);
+	glEnd();
+
+	glUseProgram(0);
+
 	glPopMatrix();
 	glMatrixMode(GL_MODELVIEW);
 	glPopMatrix();
 
 	glPopAttrib();
 }
-
-static Mesh gen_view_mesh(int usub, int vsub, float aspect, float lens_center_offset,
-		float scale, const float *dist_factors, float tex_scale_x, float tex_scale_y)
-{
-	int uverts = usub + 1;
-	int vverts = vsub + 1;
-
-	int num_verts = uverts * vverts;
-	int num_quads = usub * vsub;
-	int num_tris = num_quads * 2;
-
-	Vertex *varr = new Vertex[num_verts];
-	unsigned int *iarr = new unsigned int[num_tris * 3];
-
-	float du = 1.0 / (float)usub;
-	float dv = 1.0 / (float)vsub;
-
-	Vertex *vptr = varr;
-	for(int i=0; i<vverts; i++) {
-		float v = (float)i * dv;
-		float y = 2.0 * v - 1.0;
-
-		for(int j=0; j<uverts; j++) {
-			float u = (float)j * du;
-			float x = 2.0 * u - 1.0;
-			float tc[2] = {u, v};
-
-			distort_texcoords(tc, aspect, lens_center_offset, scale, dist_factors);
-
-			vptr->x = x;
-			vptr->y = y;
-			vptr->z = 0;
-			vptr->tx = tc[0] * tex_scale_x;
-			vptr->ty = tc[1] * tex_scale_y;
-			vptr++;
-		}
-	}
-
-	unsigned int *iptr = iarr;
-	for(int i=0; i<vsub; i++) {
-		for(int j=0; j<usub; j++) {
-			*iptr++ = i * uverts + j;
-			*iptr++ = (i + 1) * uverts + j;
-			*iptr++ = (i + 1) * uverts + (j + 1);
-
-			*iptr++ = i * uverts + j;
-			*iptr++ = (i + 1) * uverts + (j + 1);
-			*iptr++ = i * uverts + (j + 1);
-		}
-	}
-
-	unsigned int buf[2];
-	glGenBuffers(2, buf);
-	glBindBuffer(GL_ARRAY_BUFFER, buf[0]);
-	glBufferData(GL_ARRAY_BUFFER, num_verts * sizeof *varr, varr, GL_STATIC_DRAW);
-	glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, buf[1]);
-	glBufferData(GL_ELEMENT_ARRAY_BUFFER, num_tris * 3 * sizeof *iarr, iarr, GL_STATIC_DRAW); 
-
-	delete [] varr;
-	delete [] iarr;
-
-	Mesh mesh;
-	mesh.prim = GL_TRIANGLES;
-	mesh.num_verts = num_verts;
-	mesh.num_faces = num_tris;
-	mesh.vbo = buf[0];
-	mesh.ibo = buf[1];
-	return mesh;
-}
-
-static void distort_texcoords(float *tc, float aspect, float lens_center_offset, float scale, const float *dist_factors)
-{
-	// map tc [0, 1] -> [-1, 1]
-	float ptx = tc[0] * 2.0 - 1.0;
-	float pty = tc[1] * 2.0 - 1.0;
-
-	ptx += lens_center_offset * 2.0;
-	pty /= aspect;	// correct for aspect ratio
-
-	float rad = barrel_scale(ptx * ptx + pty * pty, dist_factors);
-	ptx *= rad;	// scale the point by the computer distortion radius
-	pty *= rad;
-
-	ptx /= scale;
-	pty /= scale;
-
-	pty *= aspect;
-	ptx -= lens_center_offset * 2.0;
-
-	// map back to range [0, 1]
-	tc[0] = ptx * 0.5 + 0.5;
-	tc[1] = pty * 0.5 + 0.5;
-}
-
-static float barrel_scale(float rad, const float *k)
-{
-	float radsq = rad * rad;
-	float radquad = radsq * radsq;
-	return k[0] + k[1] * radsq + k[2] * radquad + k[3] * radquad * radsq;
-}