diff options
| author | Michel Dänzer <mdaenzer@redhat.com> | 2020-07-24 18:21:05 +0200 |
|---|---|---|
| committer | Michel Dänzer <michel@daenzer.net> | 2020-08-24 17:39:34 +0200 |
| commit | 032af35657aa95c6bbdb74ff8c72e535b9b56cfa (patch) | |
| tree | 62c108b099491482848d475cc730d080d1e25030 /glamor | |
| parent | b22b4da980b763af5124f26627cad93983542d6b (diff) | |
glamor: Fix glamor_poly_fill_rect_gl xRectangle::width/height handling
(Using GLSL 1.30 or newer)
The width/height members of xRectangle are unsigned, but they were
being interpreted as signed when converting to floating point for the
vertex shader, producing incorrect drawing for values > 32767.
v2:
* Use separate GL_UNSIGNED_SHORT vertex attribute for width/height.
(Eric Anholt)
Reviewed-by: Eric Anholt <eric@anholt.net>
Diffstat (limited to 'glamor')
| -rw-r--r-- | glamor/glamor_rects.c | 18 |
1 files changed, 14 insertions, 4 deletions
diff --git a/glamor/glamor_rects.c b/glamor/glamor_rects.c index 6cbb040c1..ae4fe8bcc 100644 --- a/glamor/glamor_rects.c +++ b/glamor/glamor_rects.c @@ -27,8 +27,10 @@ static const glamor_facet glamor_facet_polyfillrect_130 = { .name = "poly_fill_rect", .version = 130, - .vs_vars = "attribute vec4 primitive;\n", - .vs_exec = (" vec2 pos = primitive.zw * vec2(gl_VertexID&1, (gl_VertexID&2)>>1);\n" + .source_name = "size", + .vs_vars = "attribute vec2 primitive;\n" + "attribute vec2 size;\n", + .vs_exec = (" vec2 pos = size * vec2(gl_VertexID&1, (gl_VertexID&2)>>1);\n" GLAMOR_POS(gl_Position, (primitive.xy + pos))), }; @@ -81,9 +83,14 @@ glamor_poly_fill_rect_gl(DrawablePtr drawable, glEnableVertexAttribArray(GLAMOR_VERTEX_POS); glVertexAttribDivisor(GLAMOR_VERTEX_POS, 1); - glVertexAttribPointer(GLAMOR_VERTEX_POS, 4, GL_SHORT, GL_FALSE, + glVertexAttribPointer(GLAMOR_VERTEX_POS, 2, GL_SHORT, GL_FALSE, 4 * sizeof (short), vbo_offset); + glEnableVertexAttribArray(GLAMOR_VERTEX_SOURCE); + glVertexAttribDivisor(GLAMOR_VERTEX_SOURCE, 1); + glVertexAttribPointer(GLAMOR_VERTEX_SOURCE, 2, GL_UNSIGNED_SHORT, GL_FALSE, + 4 * sizeof (short), vbo_offset + 2 * sizeof (short)); + memcpy(v, prect, nrect * sizeof (xRectangle)); glamor_put_vbo_space(screen); @@ -156,8 +163,11 @@ glamor_poly_fill_rect_gl(DrawablePtr drawable, bail: glDisable(GL_SCISSOR_TEST); - if (glamor_priv->glsl_version >= 130) + if (glamor_priv->glsl_version >= 130) { + glVertexAttribDivisor(GLAMOR_VERTEX_SOURCE, 0); + glDisableVertexAttribArray(GLAMOR_VERTEX_SOURCE); glVertexAttribDivisor(GLAMOR_VERTEX_POS, 0); + } glDisableVertexAttribArray(GLAMOR_VERTEX_POS); return ret; |