Stefan Dösinger : wined3d: Emulate fractional viewports if GL doesn't support them.
Alexandre Julliard
julliard at winehq.org
Thu Nov 4 17:04:22 CDT 2021
Module: wine
Branch: master
Commit: 26a53f674c234aaba4a85ec36bae48384899b705
URL: https://source.winehq.org/git/wine.git/?a=commit;h=26a53f674c234aaba4a85ec36bae48384899b705
Author: Stefan Dösinger <stefan at codeweavers.com>
Date: Wed Nov 3 20:15:30 2021 +0300
wined3d: Emulate fractional viewports if GL doesn't support them.
This allows test_fractional_viewports to pass regardless of GL capabilies.
I don't think we can get rid of WINED3D_PIXEL_CENTER_INTEGER (and add +0.5
in the client libs) due to vpos in d3d9 shaders.
Signed-off-by: Stefan Dösinger <stefan at codeweavers.com>
Signed-off-by: Henri Verbeet <hverbeet at codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard at winehq.org>
---
dlls/wined3d/adapter_gl.c | 3 +++
dlls/wined3d/adapter_vk.c | 1 +
dlls/wined3d/state.c | 16 ++++++++++++++++
dlls/wined3d/wined3d_private.h | 14 +++++++++++---
4 files changed, 31 insertions(+), 3 deletions(-)
diff --git a/dlls/wined3d/adapter_gl.c b/dlls/wined3d/adapter_gl.c
index 2a91418b0d0..7ec30cb4356 100644
--- a/dlls/wined3d/adapter_gl.c
+++ b/dlls/wined3d/adapter_gl.c
@@ -991,6 +991,7 @@ static void quirk_broken_arb_fog(struct wined3d_gl_info *gl_info)
static void quirk_broken_viewport_subpixel_bits(struct wined3d_gl_info *gl_info)
{
+ gl_info->limits.viewport_subpixel_bits = 0;
if (gl_info->supported[ARB_CLIP_CONTROL])
{
TRACE("Disabling ARB_clip_control.\n");
@@ -3655,6 +3656,7 @@ static BOOL wined3d_adapter_init_gl_caps(struct wined3d_adapter *adapter,
TRACE("Disabling ARB_clip_control because viewport subpixel bits < 8.\n");
gl_info->supported[ARB_CLIP_CONTROL] = FALSE;
}
+ gl_info->limits.viewport_subpixel_bits = subpixel_bits;
}
if (gl_info->supported[ARB_CLIP_CONTROL] && !gl_info->supported[ARB_VIEWPORT_ARRAY])
{
@@ -5141,6 +5143,7 @@ static void wined3d_adapter_gl_init_d3d_info(struct wined3d_adapter_gl *adapter_
d3d_info->full_ffp_varyings = !!(shader_caps.wined3d_caps & WINED3D_SHADER_CAP_FULL_FFP_VARYINGS);
d3d_info->scaled_resolve = !!gl_info->supported[EXT_FRAMEBUFFER_MULTISAMPLE_BLIT_SCALED];
d3d_info->pbo = !!gl_info->supported[ARB_PIXEL_BUFFER_OBJECT];
+ d3d_info->subpixel_viewport = gl_info->limits.viewport_subpixel_bits >= 8;
d3d_info->feature_level = feature_level_from_caps(gl_info, &shader_caps, &fragment_caps);
d3d_info->filling_convention_offset = gl_info->filling_convention_offset;
diff --git a/dlls/wined3d/adapter_vk.c b/dlls/wined3d/adapter_vk.c
index ac768f8304f..2bd3aa31e49 100644
--- a/dlls/wined3d/adapter_vk.c
+++ b/dlls/wined3d/adapter_vk.c
@@ -2257,6 +2257,7 @@ static void wined3d_adapter_vk_init_d3d_info(struct wined3d_adapter_vk *adapter_
d3d_info->scaled_resolve = false;
d3d_info->pbo = true;
d3d_info->feature_level = feature_level_from_caps(&shader_caps);
+ d3d_info->subpixel_viewport = true;
/* Like GL, Vulkan doesn't explicitly specify a filling convention and only mandates that a
* shared edge of two adjacent triangles generate a fragment for exactly one of the triangles.
diff --git a/dlls/wined3d/state.c b/dlls/wined3d/state.c
index 901771fdcc1..5e41f681c75 100644
--- a/dlls/wined3d/state.c
+++ b/dlls/wined3d/state.c
@@ -4208,6 +4208,22 @@ static void viewport_miscpart(struct wined3d_context *context, const struct wine
viewports[i * 4 + 1] = vp[i].y;
viewports[i * 4 + 2] = vp[i].width;
viewports[i * 4 + 3] = vp[i].height;
+
+ /* Don't pass fractionals to GL if we earlier decided not to use
+ * this functionality for two reasons: First, GL might offer us
+ * fewer than 8 bits, and still make use of the fractional, in
+ * addition to the emulation we apply in shader_get_position_fixup.
+ * Second, even if GL tells us it has no subpixel precision (Mac OS!)
+ * it might still do something with the fractional amount, e.g.
+ * round it upwards. I can't find any info on rounding in
+ * GL_ARB_viewport_array. */
+ if (!context->d3d_info->subpixel_viewport)
+ {
+ viewports[i * 4] = floor(viewports[i * 4]);
+ viewports[i * 4 + 1] = floor(viewports[i * 4 + 1]);
+ viewports[i * 4 + 2] = floor(viewports[i * 4 + 2]);
+ viewports[i * 4 + 3] = floor(viewports[i * 4 + 3]);
+ }
}
if (context->viewport_count > state->viewport_count)
diff --git a/dlls/wined3d/wined3d_private.h b/dlls/wined3d/wined3d_private.h
index 6e0ab1ab499..8da8a60d28e 100644
--- a/dlls/wined3d/wined3d_private.h
+++ b/dlls/wined3d/wined3d_private.h
@@ -240,6 +240,7 @@ struct wined3d_d3d_info
uint32_t full_ffp_varyings : 1;
uint32_t scaled_resolve : 1;
uint32_t pbo : 1;
+ uint32_t subpixel_viewport : 1;
enum wined3d_feature_level feature_level;
DWORD multisample_draw_location;
@@ -3237,6 +3238,7 @@ struct wined3d_gl_limits
unsigned int framebuffer_width;
unsigned int framebuffer_height;
+ unsigned int viewport_subpixel_bits;
UINT glsl_varyings;
UINT glsl_vs_float_constants;
@@ -5771,7 +5773,7 @@ static inline BOOL shader_is_scalar(const struct wined3d_shader_register *reg)
static inline void shader_get_position_fixup(const struct wined3d_context *context,
const struct wined3d_state *state, unsigned int fixup_count, float *position_fixup)
{
- float center_offset;
+ float center_offset, x = 0.0f, y = 0.0f;
unsigned int i;
/* See get_projection_matrix() in utils.c for a discussion of the position fixup.
@@ -5788,8 +5790,14 @@ static inline void shader_get_position_fixup(const struct wined3d_context *conte
{
position_fixup[4 * i ] = 1.0f;
position_fixup[4 * i + 1] = 1.0f;
- position_fixup[4 * i + 2] = center_offset / state->viewports[i].width;
- position_fixup[4 * i + 3] = -center_offset / state->viewports[i].height;
+ if (!context->d3d_info->subpixel_viewport)
+ {
+ double dummy;
+ x = modf(state->viewports[i].x, &dummy) * 2.0f;
+ y = modf(state->viewports[i].y, &dummy) * 2.0f;
+ }
+ position_fixup[4 * i + 2] = (center_offset + x) / state->viewports[i].width;
+ position_fixup[4 * i + 3] = -(center_offset + y) / state->viewports[i].height;
if (context->render_offscreen)
{
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