alema/ugui.c3l
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

changed the pipeline to use 16 bit int as coords

Browse source 
thank you renderdoc for making me feel less stupid
This commit is contained in:
Alessandro Mauri 2025-06-03 09:16:51 +02:00
parent 712ce50631
commit 24bc2c67bc
5 changed files with 17 additions and 23 deletions
Download patch file Download diff file Expand all files Collapse all files

26
src/renderer.c3
View file

@ -51,10 +51,10 @@ struct Renderer {
// how each vertex is represented in the gpu
struct Vertex @packed {
struct pos {
float x, y;
short x, y;
}
struct uv {
float u, v;
short u, v;
}
struct col { // FIXME: this is shit
union {
@ -321,13 +321,13 @@ fn void Renderer.create_pipeline(&self, String shader_name, PipelineType type)
{ // at location zero there is the position of the vertex
.location = 0,
.buffer_slot = 0, // only one buffer so always slot zero
.format = GPU_VERTEXELEMENTFORMAT_FLOAT2,
.format = GPU_VERTEXELEMENTFORMAT_SHORT2,
.offset = Vertex.pos.offsetof,
},
{ // at location one there are the uv coordinates
.location = 1,
.buffer_slot = 0,
.format = GPU_VERTEXELEMENTFORMAT_FLOAT2,
.format = GPU_VERTEXELEMENTFORMAT_SHORT2,
.offset = Vertex.uv.offsetof,
},
{ // at location two there is the color
@ -500,12 +500,6 @@ fn void Renderer.update_texture(&self, String name, char[] pixels, ushort width,
}
macro void Vertex.norm(&p, float w, float h)
{
p.pos.x = p.pos.x * 2.0 / w - 1.0;
p.pos.y = -(p.pos.y * 2.0 / h - 1.0);
}
// an highly inefficient way to draw a single quad, no batching, per-quad upload
fn void Renderer.draw_rect(&self, short x, short y, short w, short h, uint color, String shader_name)
{
@ -541,15 +535,11 @@ fn void Renderer.draw_rect(&self, short x, short y, short w, short h, uint color
* +-------------+
* v2 v3
*/
quad.vertices.v1 = {.pos = {.x = x, .y = y}, .col.u = color};
quad.vertices.v2 = {.pos = {.x = x, .y = (float)y+h}, .col.u = color};
quad.vertices.v3 = {.pos = {.x = (float)x+w, .y = (float)y+h}, .col.u = color};
quad.vertices.v4 = {.pos = {.x = (float)x+w, .y = y}, .col.u = color};
quad.vertices.v1 = {.pos = {.x = x, .y = y}, .col.u = color};
quad.vertices.v2 = {.pos = {.x = x, .y = y+h}, .col.u = color};
quad.vertices.v3 = {.pos = {.x = x+w, .y = y+h}, .col.u = color};
quad.vertices.v4 = {.pos = {.x = x+w, .y = y}, .col.u = color};
quad.vertices.v1.norm(640.0, 480.0);
quad.vertices.v2.norm(640.0, 480.0);
quad.vertices.v3.norm(640.0, 480.0);
quad.vertices.v4.norm(640.0, 480.0);
// triangle 1
quad.indices.i1 = 0; // v1