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Use vec2 for glyph model scale

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bloeys
2022-07-03 22:18:37 +04:00
parent afb5453a3a
commit 115310cff7
3 changed files with 14 additions and 13 deletions
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5
glyphs/font_atlas.go
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@ -148,8 +148,7 @@ func NewFontAtlasFromFont(f *truetype.Font, face font.Face, pointSize uint) (*Fo
drawer.Dot = fixed.P(0, lineHeight)
for _, g := range glyphs {
gBounds, gAdvanceFixed, _ := face.GlyphBounds(g)
gBounds, _, _ := face.GlyphBounds(g)
ascent := absFixedI26_6(gBounds.Min.Y)
descent := absFixedI26_6(gBounds.Max.Y)
bearingX := absFixedI26_6(gBounds.Min.X)
@ -165,7 +164,7 @@ func NewFontAtlasFromFont(f *truetype.Font, face font.Face, pointSize uint) (*Fo
//Get glyph to draw but undo any applied descent so that the glyph is drawn sitting on the line exactly.
//Bearing will be applied correctly but descent will be the responsibility of the positioning code
imgRect, mask, maskp, _, _ := face.Glyph(drawer.Dot, g)
imgRect, mask, maskp, gAdvanceFixed, _ := face.Glyph(drawer.Dot, g)
if imgRect.Max.Y > drawer.Dot.Y.Ceil() {
diff := imgRect.Max.Y - drawer.Dot.Y.Ceil()
imgRect.Min.Y -= diff

6
glyphs/glyphs.go
View File

@ -64,7 +64,7 @@ func (gr *GlyphRend) DrawTextOpenGLAbs(text string, screenPos *gglm.Vec3, color
}
gr.GlyphCount++
scale := gglm.NewVec3(advanceF32, lineHeightF32, 1)
scale := gglm.NewVec2(advanceF32, lineHeightF32)
//See: https://developer.apple.com/library/archive/documentation/TextFonts/Conceptual/CocoaTextArchitecture/Art/glyph_metrics_2x.png
//The uvs coming in make it so that glyphs are sitting on top of the baseline (no descent) and with horizontal bearing applied.
@ -77,7 +77,7 @@ func (gr *GlyphRend) DrawTextOpenGLAbs(text string, screenPos *gglm.Vec3, color
g.U, g.V,
color.R(), color.G(), color.B(), color.A(), //Color
roundF32(drawPos.X()), roundF32(drawPos.Y()), drawPos.Z(), //Model pos
scale.X(), scale.Y(), scale.Z(), //Model scale
scale.X(), scale.Y(), //Model scale
}...)
pos.SetX(pos.X() + advanceF32)
@ -253,7 +253,7 @@ func NewGlyphRend(fontFile string, fontOptions *truetype.Options, screenWidth, s
buffers.Element{ElementType: buffers.DataTypeVec2}, //UV0
buffers.Element{ElementType: buffers.DataTypeVec4}, //Color
buffers.Element{ElementType: buffers.DataTypeVec3}, //ModelPos
buffers.Element{ElementType: buffers.DataTypeVec3}, //ModelScale
buffers.Element{ElementType: buffers.DataTypeVec2}, //ModelScale
)
gr.InstancedBuf.Bind()

10
res/shaders/glyph.glsl
View File

@ -3,17 +3,19 @@
//aVertPos must be in the range [0,1]
layout(location=0) in vec3 aVertPos;
//Instanced
layout(location=1) in vec2 aUV0;
layout(location=2) in vec4 aVertColor;
layout(location=3) in vec3 aModelPos;
layout(location=4) in vec3 aModelScale;
layout(location=4) in vec2 aModelScale;
out vec2 v2fUV0;
out vec4 v2fColor;
out vec3 v2fFragPos;
//MVP = Model View Projection
uniform mat4 projViewMat;
uniform vec2 modelSize;
uniform vec2 sizeUV;
void main()
@ -21,11 +23,11 @@ void main()
mat4 modelMat = mat4(
aModelScale.x, 0.0, 0.0, 0.0,
0.0, aModelScale.y, 0.0, 0.0,
0.0, 0.0, aModelScale.z, 0.0,
0.0, 0.0, 1.0, 0.0,
aModelPos.x, aModelPos.y, aModelPos.z, 1.0
);
v2fUV0 = aUV0 + sizeUV*aVertPos.xy;
v2fUV0 = aUV0 + aVertPos.xy * sizeUV;
v2fColor = aVertColor;
v2fFragPos = vec3(modelMat * vec4(aVertPos, 1.0));