MapServer/src/mapoglrenderer.cpp at main · avinet/MapServer · GitHub

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/******************************************************************************

* $id: mapoglrenderer.cpp 7725 2011-04-09 15:56:58Z toby $

* Project: MapServer

* Purpose: Various template processing functions.

* Author: Steve Lime and the MapServer team.

******************************************************************************

* Permission is hereby granted, free of charge, to any person obtaining a

* copy of this software and associated documentation files (the "Software"),

* to deal in the Software without restriction, including without limitation

* the rights to use, copy, modify, merge, publish, distribute, sublicense,

* and/or sell copies of the Software, and to permit persons to whom the

* Software is furnished to do so, subject to the following conditions:

* The above copyright notice and this permission notice shall be included in

* all copies of this Software or works derived from this Software.

* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS

* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,

* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL

* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER

* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING

* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER

* DEALINGS IN THE SOFTWARE.

****************************************************************************/

#ifdef USE_OGL

#include <algorithm>

#include <fstream>

#include "mapserver.h"

#include "maperror.h"

#include "mapoglrenderer.h"

using namespace std;

double OglRenderer::SIZE_RES = 100.0 / 72.0;

ms_uint32 OglRenderer::OUTLINE_WIDTH = 2;

ms_uint32 OglRenderer::FONT_SIZE = 20;

ms_uint32 OglRenderer::FONT_RES = 200;

double OglRenderer::OGL_PI = 3.14159265;

ms_uint32 OglRenderer::SHAPE_CIRCLE_RES = 10;

double OglRenderer::SHAPE_CIRCLE_RADIUS = 10.0;

OglRenderer::fontCache_t OglRenderer::fontCache = OglRenderer::fontCache_t();

OglRenderer::dashCache_t OglRenderer::dashCache = OglRenderer::dashCache_t();

std::vector<GLuint> OglRenderer::shapes = std::vector<GLuint>();

GLvoid CALLBACK beginCallback(GLenum which);

GLvoid CALLBACK errorCallback(GLenum errorCode);

GLvoid CALLBACK endCallback(void);

GLvoid CALLBACK combineDataCallback(GLdouble coords[3],

GLdouble *vertex_data[4], GLfloat weight[4],

void **dataOut, void *polygon_data);

GLvoid CALLBACK vertexCallback(GLdouble *vertex);

OglRenderer::OglRenderer(ms_uint32 width, ms_uint32 height, colorObj *color)

: width(width), height(height), texture(NULL), transparency(1.0),

valid(false) {

context = new OglContext(width, height);

if (!context->isValid())

return;

if (!context->makeCurrent())

return;

int viewPort[4];

glGetIntegerv(GL_VIEWPORT, viewPort);

viewportX = viewPort[0];

viewportY = viewPort[1];

viewportWidth = viewPort[2];

viewportHeight = viewPort[3];

glPushMatrix();

// set read/write context to pbuffer

glEnable(GL_MULTISAMPLE_ARB);

glHint(GL_MULTISAMPLE_FILTER_HINT_NV, GL_NICEST);

glEnable(GL_TEXTURE_2D);

glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);

glEnable(GL_BLEND);

glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);

glDisable(GL_DEPTH_TEST);

glDepthFunc(GL_LEQUAL);

// draw & read the front buffer of pbuffer

glDrawBuffer(GL_FRONT);

glReadBuffer(GL_FRONT);

if (!(tess = gluNewTess())) {

msSetError(MS_OGLERR, "P-buffer Error: Unable to create tessalotor",

"OglRenderer");

return;

}

gluTessCallback(tess, GLU_TESS_VERTEX,

(void(CALLBACK *)(void))vertexCallback);

gluTessCallback(tess, GLU_TESS_BEGIN, (void(CALLBACK *)(void))beginCallback);

gluTessCallback(tess, GLU_TESS_END, (void(CALLBACK *)(void))endCallback);

gluTessCallback(tess, GLU_TESS_ERROR, (void(CALLBACK *)(void))errorCallback);

gluTessCallback(tess, GLU_TESS_COMBINE_DATA,

(void(CALLBACK *)(void))combineDataCallback);

if (color) {

glClearColor((double)color->red / 255, (double)color->green / 255,

(double)color->blue / 255, (double)color->alpha / 100);

} else {

glClearColor(0.0, 0.0, 0.0, 0.0);

}

glClear(GL_COLOR_BUFFER_BIT);

glViewport(0, 0, width, height);

glMatrixMode(GL_PROJECTION);

glLoadIdentity();

glOrtho(0.0, width, 0.0, height, -3.0, 3.0);

createShapes();

valid = true;

}

OglRenderer::~OglRenderer() {

makeCurrent();

glViewport(viewportX, viewportY, viewportWidth, viewportHeight);

glPopMatrix();

delete context;

}

OglCachePtr OglRenderer::getTexture() {

if (!texture) {

makeCurrent();

texture = new OglCache();

texture->texture =

createTexture(0, 0); // TEXTURE_BORDER/2, TEXTURE_BORDER/2);

texture->width = this->width;

texture->height = this->height;

}

return texture;

}

GLuint OglRenderer::createTexture(ms_uint32 offsetX, ms_uint32 offsetY) {

GLuint texture = 0;

glGenTextures(1, &texture);

glBindTexture(GL_TEXTURE_2D, texture);

glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);

glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);

glTexParameteri(GL_TEXTURE_2D, GL_GENERATE_MIPMAP, GL_TRUE);

glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);

glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);

if (OglContext::MAX_ANISOTROPY != 0) {

glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAX_ANISOTROPY_EXT,

OglContext::MAX_ANISOTROPY);

}

glCopyTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, offsetX, offsetY,

context->getWidth(), context->getHeight(), 0);

glBindTexture(GL_TEXTURE_2D, 0);

return texture;

}

bool OglRenderer::getStringBBox(char *font, double size, char *string,

rectObj *rect, double **advances) {

FTFont *face = getFTFont(font, size);

if (!face) {

msSetError(MS_OGLERR, "Failed to load font (%s).",

"OglRenderer::getStringBBox()", font);

return false;

}

float llx = 0.0f, lly = 0.0f, llz = 0.0f, urx = 0.0f, ury = 0.0f, urz = 0.0f;

glPushAttrib(GL_ALL_ATTRIB_BITS);

FTBBox boundingBox = face->BBox(string);

glPopAttrib();

rect->minx = boundingBox.Lower().X();

rect->maxx = boundingBox.Upper().X();

rect->miny = -boundingBox.Upper().Y();

rect->maxy = -boundingBox.Lower().Y();

if (advances) {

int length = strlen(string);

*advances = new double[length];

for (int i = 0; i < length; ++i) {

(*advances)[i] = face->Advance(&string[i], 1);

}

return true;

}

void OglRenderer::initializeRasterBuffer(rasterBufferObj *rb, int width,

int height, bool useAlpha) {

unsigned char *buffer = new unsigned char[4 * width * height];

rb->data.rgba.pixels = buffer;

rb->data.rgba.r = &buffer[2];

rb->data.rgba.g = &buffer[1];

rb->data.rgba.b = &buffer[0];

if (useAlpha)

rb->data.rgba.a = &buffer[3];

rb->type = MS_BUFFER_BYTE_RGBA;

rb->data.rgba.row_step = 4 * width;

rb->data.rgba.pixel_step = 4;

rb->width = width;

rb->height = height;

}

void OglRenderer::readRasterBuffer(rasterBufferObj *rb) {

makeCurrent();

unsigned char *buffer = new unsigned char[4 * width * height];

glReadPixels(0, 0, width, height, GL_BGRA, GL_UNSIGNED_BYTE, buffer);

rb->type = MS_BUFFER_BYTE_RGBA;

rb->data.rgba.pixels = buffer;

rb->data.rgba.row_step = 4 * width;

rb->data.rgba.pixel_step = 4;

rb->width = width;

rb->height = height;

rb->data.rgba.r = &buffer[2];

rb->data.rgba.g = &buffer[1];

rb->data.rgba.b = &buffer[0];

rb->data.rgba.a = NULL;

}

void OglRenderer::drawRasterBuffer(rasterBufferObj *overlay, double opacity,

int srcX, int srcY, int dstX, int dstY,

int width, int height) {

// todo to support all alpha and srcx/y this needs to be done by creating a

// texture

makeCurrent();

glDrawPixels(width, height, GL_BGRA, GL_UNSIGNED_BYTE,

overlay->data.rgba.pixels);

}

void OglRenderer::setTransparency(double transparency) {

this->transparency = transparency;

}

void OglRenderer::setColor(colorObj *color) {

if (color && MS_VALID_COLOR(*color)) {

glColor4d((double)color->red / 255, (double)color->green / 255,

(double)color->blue / 255, transparency);

} else {

glColor4d(0.0, 0.0, 0.0, 1.0);

}

void OglRenderer::drawVectorLineStrip(symbolObj *symbol, double width) {

glPushMatrix();

glLineWidth(width);

glBegin(GL_LINE_STRIP);

for (int i = 0; i < symbol->numpoints; i++) {

if (symbol->points[i].x < 0 && symbol->points[i].y < 0) {

glEnd();

glBegin(GL_LINE_STRIP);

} else {

glVertex2d(symbol->points[i].x, symbol->points[i].y);

}

glEnd();

glPopMatrix();

}

double OglRenderer::drawTriangles(pointObj *p1, pointObj *p2, double width,

double tilelength, double textureStart) {

double dx = p1->x - p2->x;

double dy = p1->y - p2->y;

double dist = sqrt(dx * dx + dy * dy);

double theta;

if (dx != 0)

theta = atan(dy / dx);

else

theta = (dy > 0 ? 1 : -1) * OGL_PI / 2;

double xw = sin(theta) * width / 2;

double yw = cos(theta) * width / 2;

double textureEnd = dist / tilelength;

glTexCoord2d(textureStart, 1);

glVertex2d(p1->x + xw, p1->y - yw); // Bottom Left Of The Texture and Quad

glTexCoord2d(textureStart, 0);

glVertex2d(p1->x - xw, p1->y + yw); // Bottom Right Of The Texture and Quad

glTexCoord2d(textureStart + textureEnd, 1);

glVertex2d(p2->x + xw, p2->y - yw); // Top Right Of The Texture and Quad

glTexCoord2d(textureStart + textureEnd, 0);

glVertex2d(p2->x - xw, p2->y + yw); // Top Left Of The Texture and Quad

return dist;

}

double OglRenderer::drawQuad(pointObj *p1, pointObj *p2, double width,

double tilelength, double textureStart) {

double dx = p1->x - p2->x;

double dy = p1->y - p2->y;

double dist = sqrt(dx * dx + dy * dy);

double theta;

if (dx)

theta = atan(dy / dx);

else

theta = (dy > 0 ? 1 : -1) * OGL_PI / 2;

glPushMatrix();

glTranslated(p1->x, p1->y, 0);

glRotated((p1->x < p2->x ? 0 : 180) + theta * (180 / OGL_PI), 0, 0, 1);

glTranslated(-p1->x, -p1->y, 0);

glBegin(GL_QUADS);

glTexCoord2d(textureStart, 1);

glVertex2d(p1->x, p1->y - width / 2); // Bottom Left Of The Texture and Quad

glTexCoord2d(textureStart + (dist / tilelength), 1);

glVertex2d(p1->x + dist,

p1->y - width / 2); // Bottom Right Of The Texture and Quad

glTexCoord2d(textureStart + (dist / tilelength), 0);

glVertex2d(p1->x + dist,

p1->y + width / 2); // Top Right Of The Texture and Quad

glTexCoord2d(textureStart, 0);

glVertex2d(p1->x, p1->y + width / 2); // Top Left Of The Texture and Quad

glEnd();

glPopMatrix();

return dist;

}

void OglRenderer::renderTile(const OglCachePtr &tile, double x, double y,

double angle) {

makeCurrent();

glEnable(GL_SAMPLE_ALPHA_TO_COVERAGE_ARB);

glBindTexture(GL_TEXTURE_2D, tile->texture);

glPushMatrix();

glTranslated(x, y, 0);

if (angle) {

glRotated(angle, 0, 0, 1);

}

glTranslated(-x, -y, 0);

glBegin(GL_QUADS);

glTexCoord2d(0, 1);

glVertex2d(x - (tile->width / 2),

y + (tile->height / 2)); // Bottom Left Of The Texture and Quad

glTexCoord2d(1, 1);

glVertex2d(x + (tile->width / 2),

y + (tile->height / 2)); // Bottom Right Of The Texture and Quad

glTexCoord2d(1, 0);

glVertex2d(x + (tile->width / 2),

y - (tile->height / 2)); // Top Right Of The Texture and Quad

glTexCoord2d(0, 0);

glVertex2d(x - (tile->width / 2),

y - (tile->height / 2)); // Top Left Of The Texture and Quad

glEnd();

glPopMatrix();

glBindTexture(GL_TEXTURE_2D, 0);

glDisable(GL_SAMPLE_ALPHA_TO_COVERAGE_ARB);

}

void OglRenderer::renderPolylineTile(shapeObj *shape, const OglCachePtr &tile) {

makeCurrent();

glBindTexture(GL_TEXTURE_2D, tile->texture); // Select Our Texture

glBegin(GL_TRIANGLE_STRIP);

double place = 0.0;

for (int i = 0; i < shape->numlines; i++) {

for (int j = 0; j < shape->line[i].numpoints - 1; j++) {

double dist =

drawTriangles(&shape->line[i].point[j], &shape->line[i].point[j + 1],

tile->height, tile->width, place / tile->width);

place = (place + dist);

while (place >= tile->width)

place -= tile->width;

}

glEnd();

glBindTexture(GL_TEXTURE_2D, 0);

}

void OglRenderer::renderVectorSymbol(double x, double y, symbolObj *symbol,

double scale, double angle, colorObj *c,

colorObj *oc, double ow) {

makeCurrent();

glPushMatrix();

glTranslated(x, y, 0);

glRotated(angle, 0, 0, 1);

glScaled(scale, scale, 0);

glTranslated(-symbol->sizex / 2, -symbol->sizey / 2, 0.0);

if (oc != NULL && MS_VALID_COLOR(*oc) && ow > 0) {

setColor(oc);

drawVectorLineStrip(symbol, ow);

}

if (c != NULL && MS_VALID_COLOR(*c) && ow > 0) {

setColor(c);

drawVectorLineStrip(symbol, ow);

}

glPopMatrix();

}

void OglRenderer::renderPolyline(shapeObj *p, colorObj *c, double width,

int patternlength, double *pattern,

int lineCap, int joinStyle,

colorObj *outlinecolor, double outlinewidth) {

makeCurrent();

if (outlinecolor) {

glEnable(GL_DEPTH_TEST);

glPushMatrix();

glTranslated(0, 0, 1);

}

setColor(c);

if (patternlength > 0) {

if (p->renderer_cache == NULL) {

loadLine(p, width, patternlength, pattern);

}

/* FIXME */

if (p->renderer_cache == NULL)

return;

OglCache *cache = (OglCache *)p->renderer_cache;

GLuint texture = cache->texture;

if (cache->patternDistance > 0) {

glBindTexture(GL_TEXTURE_2D, texture);

double place = 0;

glBegin(GL_TRIANGLE_STRIP);

for (int j = 0; j < p->numlines; j++) {

for (int i = 0; i < p->line[j].numpoints - 1; i++) {

double dist = drawTriangles(

&p->line[j].point[i], &p->line[j].point[i + 1], width,

cache->patternDistance, place / cache->patternDistance);

place = (place + dist);

while (place >= cache->patternDistance)

place -= cache->patternDistance; // better than mod, no rounding

}

glEnd();

glBindTexture(GL_TEXTURE_2D, 0);

}

} else {

float widthRange[2];

glGetFloatv(GL_LINE_WIDTH_RANGE, widthRange);

bool quads = !(width >= widthRange[0] && width <= widthRange[1]);

double circleScale = width / SHAPE_CIRCLE_RADIUS / 2;

glLineWidth(width);

if (quads || (width > 1.0 &&

(lineCap == MS_CJC_ROUND || joinStyle == MS_CJC_ROUND))) {

for (int j = 0; j < p->numlines; j++) {

for (int i = 0; i < p->line[j].numpoints; i++) {

if (i != p->line[j].numpoints - 1) {

if (quads) {

drawQuad(&p->line[j].point[i], &p->line[j].point[i + 1], width);

} else {

glBegin(GL_LINES);

glVertex2f(p->line[j].point[i].x, p->line[j].point[i].y);

glVertex2f(p->line[j].point[i + 1].x, p->line[j].point[i + 1].y);

glEnd();

}

if ((lineCap == MS_CJC_ROUND &&

(i == 0 || i == p->line[j].numpoints - 1)) ||

(joinStyle == MS_CJC_ROUND &&

(i > 0 && i < p->line[j].numpoints - 1))) {

glPushMatrix();

glTranslated(p->line[j].point[i].x, p->line[j].point[i].y, 0);

glScaled(circleScale, circleScale, 0);

glCallList(shapes[circle]);

glPopMatrix();

}

} else {

for (int j = 0; j < p->numlines; j++) {

glBegin(GL_LINE_STRIP);

for (int i = 0; i < p->line[j].numpoints; i++) {

glVertex2f(p->line[j].point[i].x, p->line[j].point[i].y);

}

glEnd();

}

if (outlinecolor != NULL && MS_VALID_COLOR(*outlinecolor)) {

glPopMatrix();

double owidth = MS_MAX(width + OUTLINE_WIDTH, outlinewidth);

glPushMatrix();

glTranslated(0, 0, -1);

renderPolyline(p, outlinecolor, owidth, patternlength, pattern, lineCap,

joinStyle);

glPopMatrix();

glDisable(GL_DEPTH_TEST);

}

void OglRenderer::renderPolygon(shapeObj *p, colorObj *color,

colorObj *outlinecolor, double outlinewidth,

const OglCachePtr &tile, int lineCap,

int joinStyle) {

OpenGL cannot draw complex polygons so we need to use a Tessallator to draw

the polygon using a GL_TRIANGLE_FAN

ISSUE: There's a problem here. It would seem that changing the dimensions or

bounding box area breaks the code. Reports need for a combine callback.

makeCurrent();

std::vector<GLdouble *> pointers;

double texWidth = 0;

double texHeight = 0;

if (tile) {

glBindTexture(GL_TEXTURE_2D, tile->texture); // Select Our Texture

texWidth = tile->width;

texHeight = tile->height;

}

setColor(color);

gluTessBeginPolygon(tess, NULL);

for (int j = 0; j < p->numlines; j++) {

gluTessBeginContour(tess);

for (int i = 0; i < p->line[j].numpoints; i++) {

// create temp array and place

GLdouble *dbls = new GLdouble[5];

pointers.push_back(dbls);

dbls[0] = p->line[j].point[i].x;

dbls[1] = p->line[j].point[i].y;

dbls[2] = 0.0;

dbls[3] = texWidth;

dbls[4] = texHeight;

gluTessVertex(tess, dbls, dbls);

}

gluTessEndContour(tess);

}

gluTessEndPolygon(tess);

// destroy temp arrays

for (std::vector<GLdouble *>::iterator iter = pointers.begin();

iter != pointers.end(); iter++) {

delete[] * iter;

}

glBindTexture(GL_TEXTURE_2D, 0); // Select Our Texture

if (outlinecolor != NULL && MS_VALID_COLOR(*outlinecolor) &&

outlinewidth > 0) {

renderPolyline(p, outlinecolor, outlinewidth, 0, NULL, lineCap, joinStyle);

}

void OglRenderer::renderGlyphs(double x, double y, colorObj *color,

colorObj *outlinecolor, double size,

const char *font, char *thechars, double angle,

colorObj *shadowcolor, double shdx,

double shdy) {

makeCurrent();

FTFont *face = getFTFont(font, size);

if (!face) {

msSetError(MS_OGLERR, "Failed to load font (%s).",

"OglRenderer::renderGlyphs()", font);

return;

}

glPushAttrib(GL_ALL_ATTRIB_BITS);

glPushMatrix();

glTranslated(floor(x), floor(y), 0);

glScaled(1.0, -1.0, 1);

glRotated(angle * (180 / OGL_PI), 0, 0, 1);

if (outlinecolor && MS_VALID_COLOR(*outlinecolor)) {

setColor(outlinecolor);

for (int i = -1; i <= 1; i++) {

for (int j = -1; j <= 1; j++) {

if (i || j) {

glPushMatrix();

glTranslated(i, j, 0);

face->Render(thechars);

glPopMatrix();

}

if (color != NULL && MS_VALID_COLOR(*color)) {

setColor(color);

face->Render(thechars);

}

glPopMatrix();

glPopAttrib();

}

void OglRenderer::renderPixmap(symbolObj *symbol, double x, double y,

double angle, double scale) {

makeCurrent();

float zoomX, zoomY;

glGetFloatv(GL_ZOOM_X, &zoomX);

glGetFloatv(GL_ZOOM_Y, &zoomY);

GLubyte *imgdata = symbol->pixmap_buffer->data.rgba.pixels;

glPixelZoom(zoomX * scale, zoomY * scale);

glRasterPos2d(x - symbol->pixmap_buffer->width / 2,

y - symbol->pixmap_buffer->height / 2);

glDrawPixels(symbol->pixmap_buffer->width, symbol->pixmap_buffer->height,

GL_BGRA, GL_UNSIGNED_BYTE, imgdata);

glPixelZoom(zoomX, zoomY);

}

void OglRenderer::renderEllipse(double x, double y, double angle, double width,

double height, colorObj *color,

colorObj *outlinecolor,

double outlinewidth = 1.0) {

makeCurrent();

if (outlinecolor && MS_VALID_COLOR(*outlinecolor)) {

glEnable(GL_DEPTH_TEST);

glPushMatrix();

glTranslated(0, 0, 1);

}

setColor(color);

glPushMatrix();

if (angle) {

glRotated(angle, 0, 0, 1);

}

glTranslated(x, y, 0);

glScaled(width / SHAPE_CIRCLE_RADIUS / 2, height / SHAPE_CIRCLE_RADIUS / 2,

1);

glCallList(shapes[circle]);

glPopMatrix();

if (outlinecolor != NULL && MS_VALID_COLOR(*outlinecolor)) {

glPopMatrix();

glPushMatrix();

glTranslated(0, 0, -1);

renderEllipse(x, y, angle, width + outlinewidth, height, outlinecolor, NULL,

0);

glPopMatrix();

glDisable(GL_DEPTH_TEST);

}

bool OglRenderer::loadLine(shapeObj *shape, double width, int patternlength,

double *pattern) {

/* OglCache* cache = (OglCache*) shape->renderer_cache;

if (cache->patternDistance == 0)

{

for (int i = 0; i < patternlength; i++)

{

cache->patternDistance += pattern[i];

}

GLubyte imgdata[TEX_SIZE * TEX_SIZE * 4];

int pow2length = min(max(NextPowerOf2(cache->patternDistance),

MIN_TEX_SIZE), TEX_SIZE); int pow2width = min(max(NextPowerOf2(width),

MIN_TEX_SIZE), TEX_SIZE);

double lengthScale = (double) pow2length / cache->patternDistance;

glColor3d(0, 0, 0);

double place = 0;

double xRadii = width / 2 * lengthScale;

double yRadii = pow2width / 2;

for (int i = 0; i < patternlength; i++)

{

double next = pattern[i] * lengthScale;

if (i % 2 == 0)

{

glPushMatrix();

glTranslated(place + xRadii, yRadii, 0);

glScaled(xRadii / SHAPE_CIRCLE_RADIUS,

yRadii / SHAPE_CIRCLE_RADIUS, 0);

glCallList(shapes[circle]);

glPopMatrix();

glBegin(GL_QUADS);

glVertex2d(place + pow2width / 2, 0);

glVertex2d(place + next - pow2width / 2, 0);

glVertex2d(place + next - pow2width / 2, pow2width);

glVertex2d(place + pow2width / 2, pow2width);

glEnd();

glPushMatrix();

glTranslated(place + next - xRadii, yRadii, 0);

glScaled(xRadii / SHAPE_CIRCLE_RADIUS,

yRadii / SHAPE_CIRCLE_RADIUS, 0);

glCallList(shapes[circle]);

glPopMatrix();

}

place += next;

}

glReadPixels(0, 0, pow2length, pow2width, GL_RGBA, GL_UNSIGNED_BYTE,

imgdata);

//createTexture(pow2length, pow2width, GL_ALPHA, imgdata);*/

return true;

}

FTFont *OglRenderer::getFTFont(const char *font, double size) {

FTFont **face = &fontCache[font][size];

if (*face == NULL && ifstream(font)) {

*face = new FTGLTextureFont(font);

if (*face) {

(*face)->UseDisplayList(true);

(*face)->FaceSize(size * SIZE_RES);

}

return *face;

}

GLvoid CALLBACK beginCallback(GLenum which) { glBegin(which); }

GLvoid CALLBACK errorCallback(GLenum errorCode) {

const GLubyte *estring;

estring = gluErrorString(errorCode);

fprintf(stderr, "Tessellation Error: %d %s\n", errorCode, estring);

exit(0);

}

GLvoid CALLBACK endCallback(void) { glEnd(); }

GLvoid CALLBACK combineDataCallback(GLdouble coords[3],

GLdouble *vertex_data[4], GLfloat weight[4],

void **dataOut, void *polygon_data) {

GLdouble *vertex;

vertex = (GLdouble *)malloc(5 * sizeof(GLdouble));

vertex[0] = coords[0];

vertex[1] = coords[1];

vertex[2] = coords[2];

vertex[3] = vertex_data[0][3];

vertex[4] = vertex_data[0][4];

*dataOut = vertex;

}

GLvoid CALLBACK vertexCallback(GLdouble *vertex) {

if (vertex[3] > 0)

glTexCoord2d(vertex[0] / vertex[3], vertex[1] / vertex[4]);

glVertex3dv(vertex);

}

void OglRenderer::createShapes() {

double da = MS_MIN(OGL_PI / 2, OGL_PI / SHAPE_CIRCLE_RES);

GLuint circle = glGenLists(1);

glNewList(circle, GL_COMPILE);

glBegin(GL_TRIANGLE_FAN);

glVertex2d(0, 0);

for (double a = 0.0; a <= 2 * OGL_PI; a += da) {

glVertex2d(0 + cos(a) * SHAPE_CIRCLE_RADIUS,

0 + sin(a) * SHAPE_CIRCLE_RADIUS);

}

glVertex2d(0 + SHAPE_CIRCLE_RADIUS, 0);

glEnd();

glEndList();

shapes.push_back(circle);

}

void OglRenderer::makeCurrent() { context->makeCurrent(); }

#endif

MapServer/src/mapoglrenderer.cpp at main · avinet/MapServer · GitHub

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