Plane: Add fallback without GL_REPEAT texture wrapping

This isn't supported under GLES 2.0 for npot textures.
This commit is contained in:
Jonas Kulla 2014-07-17 10:09:58 +02:00
parent a17043f785
commit 20e46a98dd
3 changed files with 66 additions and 11 deletions

View File

@ -97,6 +97,7 @@ void initGLFunctions()
// FIXME: Set based on GL kind
gl.unpack_subimage = true;
gl.npot_repeat = true;
#define HAVE_EXT(_ext) ext.contains("GL_" #_ext)

View File

@ -142,6 +142,7 @@ struct GLFunctions
GL_DEBUG_KHR_FUN
bool unpack_subimage;
bool npot_repeat;
#undef GL_FUN
};

View File

@ -28,6 +28,7 @@
#include "gl-util.h"
#include "quad.h"
#include "quadarray.h"
#include "transform.h"
#include "etc-internal.h"
#include "shader.h"
@ -35,6 +36,12 @@
#include <sigc++/connection.h>
static float fwrap(float value, float range)
{
float res = fmod(value, range);
return res < 0 ? res + range : res;
}
struct PlanePrivate
{
Bitmap *bitmap;
@ -50,7 +57,7 @@ struct PlanePrivate
bool quadSourceDirty;
Quad quad;
SimpleQuadArray qArray;
EtcTemps tmp;
@ -68,6 +75,8 @@ struct PlanePrivate
{
prepareCon = shState->prepareDraw.connect
(sigc::mem_fun(this, &PlanePrivate::prepare));
qArray.resize(1);
}
~PlanePrivate()
@ -77,13 +86,53 @@ struct PlanePrivate
void updateQuadSource()
{
FloatRect srcRect;
srcRect.x = (sceneGeo.yOrigin + ox) / zoomX;
srcRect.y = (sceneGeo.xOrigin + oy) / zoomY;
srcRect.w = sceneGeo.rect.w / zoomX;
srcRect.h = sceneGeo.rect.h / zoomY;
if (gl.npot_repeat)
{
FloatRect srcRect;
srcRect.x = (sceneGeo.yOrigin + ox) / zoomX;
srcRect.y = (sceneGeo.xOrigin + oy) / zoomY;
srcRect.w = sceneGeo.rect.w / zoomX;
srcRect.h = sceneGeo.rect.h / zoomY;
quad.setTexRect(srcRect);
Quad::setTexRect(&qArray.vertices[0], srcRect);
qArray.commit();
return;
}
if (!bitmap)
return;
/* Scaled (zoomed) bitmap dimensions */
double sw = bitmap->width() * zoomX;
double sh = bitmap->height() * zoomY;
/* Plane offset wrapped by scaled bitmap dims */
float wox = fwrap(ox, sw);
float woy = fwrap(oy, sh);
/* Viewport dimensions */
int vpw = sceneGeo.rect.w;
int vph = sceneGeo.rect.h;
/* Amount the scaled bitmap is tiled (repeated) */
size_t tilesX = ceil((vpw - sw + wox) / sw) + 1;
size_t tilesY = ceil((vph - sh + woy) / sh) + 1;
FloatRect tex = bitmap->rect();
qArray.resize(tilesX * tilesY);
for (size_t y = 0; y < tilesY; ++y)
for (size_t x = 0; x < tilesX; ++x)
{
SVertex *vert = &qArray.vertices[(y*tilesX + x) * 4];
FloatRect pos(x*sw - wox, y*sh - woy, sw, sh);
Quad::setTexPosRect(vert, tex, pos);
}
qArray.commit();
}
void prepare()
@ -238,18 +287,22 @@ void Plane::draw()
glState.blendMode.pushSet(p->blendType);
p->bitmap->bindTex(*base);
TEX::setRepeat(true);
p->quad.draw();
if (gl.npot_repeat)
TEX::setRepeat(true);
TEX::setRepeat(false);
p->qArray.draw();
if (gl.npot_repeat)
TEX::setRepeat(false);
glState.blendMode.pop();
}
void Plane::onGeometryChange(const Scene::Geometry &geo)
{
p->quad.setPosRect(FloatRect(geo.rect));
if (gl.npot_repeat)
Quad::setPosRect(&p->qArray.vertices[0], FloatRect(geo.rect));
p->sceneGeo = geo;
p->quadSourceDirty = true;