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render/vulkan: Use instanced draws instead of scissors

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Similar to what we have already done for gles2. To simplify things we
use the staging ring buffer for the vertex buffers by extending the
usage bits, rather than introducing a separate pool.

Signed-off-by: Kenny Levinsen <kl@kl.wtf>
This commit is contained in:
Kenny Levinsen 2026-04-12 17:47:40 +02:00 • committed by Félix Poisot
parent 439258a43b
commit 8abe53d1d2
3 changed files with 113 additions and 39 deletions
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3
render/vulkan/shaders/common.vert
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@ -8,11 +8,14 @@ layout(push_constant, row_major) uniform UBO {
vec2 uv_size;
} data;
layout(location = 0) in vec4 inst_rect;
layout(location = 0) out vec2 uv;
void main() {
vec2 pos = vec2(float((gl_VertexIndex + 1) & 2) * 0.5f,
float(gl_VertexIndex & 2) * 0.5f);
pos = inst_rect.xy + pos * inst_rect.zw;
uv = data.uv_offset + pos * data.uv_size;
gl_Position = data.proj * vec4(pos, 0.0, 1.0);
}