From: David Gow <david@ingeniumdigital.com>
Date: Mon, 30 Jun 2014 04:26:52 +0000 (+0800)
Subject: Maybe don't use all of the lines. Or maybe do.
X-Git-Url: https://git.ucc.asn.au/?p=ipdf%2Fcode.git;a=commitdiff_plain;h=54798ed9050d0742c6cdab067fad0cc364b1d6b2

Maybe don't use all of the lines. Or maybe do.
---

diff --git a/bin/ipdf b/bin/ipdf
index 4739d21..03e79d7 100755
Binary files a/bin/ipdf and b/bin/ipdf differ
diff --git a/src/shaders/bezier_texbuf_geom.glsl b/src/shaders/bezier_texbuf_geom.glsl
index caf7a10..56dddbe 100644
--- a/src/shaders/bezier_texbuf_geom.glsl
+++ b/src/shaders/bezier_texbuf_geom.glsl
@@ -7,6 +7,13 @@ layout(lines) in;
 layout(line_strip, max_vertices = 101) out;
 
 in int objectid[];
+in vec2 pixsize[];
+
+//TODO: I thought this might be useful, maybe not.
+float areatriangle(vec2 a, vec2 b, vec2 c)
+{
+	return (c.y-a.y)*(b.y-a.y) - (b.x - a.x)*(c.x-a.x);
+}
 
 void main()
 {
@@ -15,9 +22,12 @@ void main()
 	vec2 coeff0 = texelFetch(bezier_buffer_texture, bezierid*3).rg + gl_in[0].gl_Position.xy ;
 	vec2 coeff1 = texelFetch(bezier_buffer_texture, bezierid*3+1).rg * boundssize + gl_in[0].gl_Position.xy;
 	vec2 coeff2 = texelFetch(bezier_buffer_texture, bezierid*3+2).rg * boundssize + gl_in[0].gl_Position.xy;
-	for (int i = 0; i <= 100; ++i)
+	vec2 boundspxsize = pixsize[0];
+	int blen = clamp(int(abs(boundspxsize.x)),2,100);
+	float invblen = 1.0f/float(blen);
+	for (int i = 0; i <= blen; ++i)
 	{
-		float t = i * 0.01f;
+		float t = i * invblen;
 		float oneminust = 1.0f - t;
 		float bernstein0 = t*t;
 		float bernstein1 = 2*t*oneminust;
diff --git a/src/shaders/rect_vert.glsl b/src/shaders/rect_vert.glsl
index a9f258a..bdfd3ea 100644
--- a/src/shaders/rect_vert.glsl
+++ b/src/shaders/rect_vert.glsl
@@ -8,11 +8,16 @@ layout(std140, binding=0) uniform ViewBounds
 	float bounds_y;
 	float bounds_w;
 	float bounds_h;
+	float pixel_x;
+	float pixel_y;
+	float pixel_w;
+	float pixel_h;
 };
 
 layout(location = 0) in vec2 position;
 
 out int objectid;
+out vec2 pixsize;
 
 void main()
 {
@@ -24,6 +29,6 @@ void main()
 	gl_Position.y = 1 - (transformed_position.y*2);
 	gl_Position.z = 0.0;
 	gl_Position.w = 1.0;
-
+	pixsize = vec2(pixel_w/bounds_w, 100*pixel_h/bounds_h);
 	objectid = gl_VertexID / 2;
 }
diff --git a/src/view.cpp b/src/view.cpp
index 4bba591..af1980a 100644
--- a/src/view.cpp
+++ b/src/view.cpp
@@ -147,13 +147,15 @@ void View::Render(int width, int height)
 
 	if (m_use_gpu_transform)
 	{
-		GLfloat glbounds[] = {static_cast<GLfloat>(Float(m_bounds.x)), static_cast<GLfloat>(Float(m_bounds.y)), static_cast<GLfloat>(Float(m_bounds.w)), static_cast<GLfloat>(Float(m_bounds.h))};
-		m_bounds_ubo.Upload(sizeof(float)*4, glbounds);
+		GLfloat glbounds[] = {static_cast<GLfloat>(Float(m_bounds.x)), static_cast<GLfloat>(Float(m_bounds.y)), static_cast<GLfloat>(Float(m_bounds.w)), static_cast<GLfloat>(Float(m_bounds.h)),
+					0.0, 0.0, 640.0, 480.0};
+		m_bounds_ubo.Upload(sizeof(float)*8, glbounds);
 	}
 	else
 	{
-		GLfloat glbounds[] = {0.0f, 0.0f, 1.0f, 1.0f};
-		m_bounds_ubo.Upload(sizeof(float)*4, glbounds);
+		GLfloat glbounds[] = {0.0f, 0.0f, 1.0f, 1.0f,
+					0.0f, 0.0f, 640.0f, 480.0f};
+		m_bounds_ubo.Upload(sizeof(float)*8, glbounds);
 	}
 	m_bounds_dirty = false;