func (b *blitter) blitShape(ctx *context, shape shape, color gxui.Color, ds *drawState) {
b.commitGlyphs(ctx)
dipsToPixels := ctx.resolution.dipsToPixels()
dw, dh := ctx.sizePixels.WH()
mPos := math.CreateMat3(
+2.0*dipsToPixels/float32(dw), 0, 0,
0, -2.0*dipsToPixels/float32(dh), 0,
-1.0+2.0*float32(ds.OriginPixels.X)/float32(dw),
+1.0-2.0*float32(ds.OriginPixels.Y)/float32(dh), 1,
)
shape.draw(ctx, b.colorShader, uniformBindings{
"mPos": mPos,
"Color": color,
})
if debugWireframePolygons {
// glPolygonMode is not available in OpenGL ES/WebGL (since its implementation is very inefficient; a shame because it's useful for debugging).
//gl.PolygonMode(gl.FRONT_AND_BACK, gl.LINE)
shape.draw(ctx, b.colorShader, uniformBindings{
"mPos": mPos,
"Color": gxui.Blue,
})
//gl.PolygonMode(gl.FRONT_AND_BACK, gl.FILL)
}
b.stats.drawCallCount++
}
func (b *blitter) commitGlyphs(ctx *context) {
tc := b.glyphBatch.GlyphPage
if tc == nil {
return
}
sw, sh := tc.sizePixels.WH()
dw, dh := ctx.sizePixels.WH()
mSrc := math.CreateMat3(
1.0/float32(sw), 0, 0,
0, 1.0/float32(sh), 0,
0.0, 0.0, 1,
)
mDst := math.CreateMat3(
+2.0/float32(dw), 0, 0,
0, -2.0/float32(dh), 0,
-1.0, +1.0, 1,
)
vb := newVertexBuffer(
newVertexStream("aDst", stFloatVec2, b.glyphBatch.DstRects),
newVertexStream("aSrc", stFloatVec2, b.glyphBatch.SrcRects),
newVertexStream("aClp", stFloatVec4, b.glyphBatch.ClipRects),
newVertexStream("aCol", stFloatVec4, b.glyphBatch.Colors),
)
ib := newIndexBuffer(ptUshort, b.glyphBatch.Indices)
s := newShape(vb, ib, dmTriangles)
gl.Disable(gl.SCISSOR_TEST)
s.draw(ctx, b.fontShader, uniformBindings{
"source": tc,
"mDst": mDst,
"mSrc": mSrc,
})
gl.Enable(gl.SCISSOR_TEST)
s.release()
b.glyphBatch.GlyphPage = nil
b.glyphBatch.DstRects = b.glyphBatch.DstRects[:0]
b.glyphBatch.SrcRects = b.glyphBatch.SrcRects[:0]
b.glyphBatch.ClipRects = b.glyphBatch.ClipRects[:0]
b.glyphBatch.Colors = b.glyphBatch.Colors[:0]
b.glyphBatch.Indices = b.glyphBatch.Indices[:0]
b.stats.drawCallCount++
}
func (b *blitter) blit(ctx *context, tc *textureContext, srcRect, dstRect math.Rect, ds *drawState) {
b.commitGlyphs(ctx)
dstRect = dstRect.Offset(ds.OriginPixels)
sw, sh := tc.sizePixels.WH()
dw, dh := ctx.sizePixels.WH()
var mUV math.Mat3
if tc.flipY {
mUV = math.CreateMat3(
float32(srcRect.W())/float32(sw), 0, 0,
0, -float32(srcRect.H())/float32(sh), 0,
float32(srcRect.Min.X)/float32(sw),
1.0-float32(srcRect.Min.Y)/float32(sh), 1,
)
} else {
mUV = math.CreateMat3(
float32(srcRect.W())/float32(sw), 0, 0,
0, float32(srcRect.H())/float32(sh), 0,
float32(srcRect.Min.X)/float32(sw),
float32(srcRect.Min.Y)/float32(sh), 1,
)
}
mPos := math.CreateMat3(
+2.0*float32(dstRect.W())/float32(dw), 0, 0,
0, -2.0*float32(dstRect.H())/float32(dh), 0,
-1.0+2.0*float32(dstRect.Min.X)/float32(dw),
+1.0-2.0*float32(dstRect.Min.Y)/float32(dh), 1,
)
if !tc.pma {
gl.BlendFunc(gl.SRC_ALPHA, gl.ONE_MINUS_SRC_ALPHA)
}
b.quad.draw(ctx, b.copyShader, uniformBindings{
"source": tc,
"mUV": mUV,
"mPos": mPos,
})
if !tc.pma {
gl.BlendFunc(gl.ONE, gl.ONE_MINUS_SRC_ALPHA)
}
b.stats.drawCallCount++
}
func (b *blitter) blitRect(ctx *context, dstRect math.Rect, color gxui.Color, ds *drawState) {
b.commitGlyphs(ctx)
dstRect = dstRect.Offset(ds.OriginPixels)
dw, dh := ctx.sizePixels.WH()
mPos := math.CreateMat3(
+2.0*float32(dstRect.W())/float32(dw), 0, 0,
0, -2.0*float32(dstRect.H())/float32(dh), 0,
-1.0+2.0*float32(dstRect.Min.X)/float32(dw),
+1.0-2.0*float32(dstRect.Min.Y)/float32(dh), 1,
)
b.quad.draw(ctx, b.colorShader, uniformBindings{
"mPos": mPos,
"Color": color,
})
b.stats.drawCallCount++
}
