From 7b7f0272219c97da68e8dd54adb0e225ff36e7f9 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Stefan=20D=C3=B6singer?= <stefan@codeweavers.com>
Date: Tue, 14 Apr 2009 20:06:15 +0200
Subject: [PATCH] wined3d: Add a more formal framework for driver quirks.

This allows better defining of driver desc fixups without adding extra if
lines for each card.

For starters, there's a fixup for the advertised GLSL constants in ATI cards.
fglrx advertises 512 GLSL uniforms instead of the supported 1024(means 128
instead of 256 vec4's). This bug was confirmed by ATI.
---
 dlls/wined3d/directx.c    | 29 +++++++++++++++++++++++++++++
 dlls/wined3d/wined3d_gl.h |  6 ++++++
 2 files changed, 35 insertions(+)

diff --git a/dlls/wined3d/directx.c b/dlls/wined3d/directx.c
index 3b46965d58c..260d5798e24 100644
--- a/dlls/wined3d/directx.c
+++ b/dlls/wined3d/directx.c
@@ -4002,10 +4002,39 @@ static const struct driver_version_information driver_version_table[] = {
     /* TODO: Add information about legacy ATI hardware, Intel and other cards */
 };
 
+static BOOL match_ati_r300_to_500(WineD3D_GL_Info *gl_info) {
+    if(gl_info->gl_vendor != VENDOR_ATI) return FALSE;
+    if(gl_info->gl_card == CARD_ATI_RADEON_9500) return TRUE;
+    if(gl_info->gl_card == CARD_ATI_RADEON_X700) return TRUE;
+    if(gl_info->gl_card == CARD_ATI_RADEON_X1600) return TRUE;
+    return FALSE;
+}
+
+static void quirk_arb_constants(WineD3D_GL_Info *gl_info) {
+    TRACE_(d3d_caps)("Using ARB vs constant limit(=%u) for GLSL\n", gl_info->vs_arb_constantsF);
+    gl_info->vs_glsl_constantsF = gl_info->vs_arb_constantsF;
+    TRACE_(d3d_caps)("Using ARB ps constant limit(=%u) for GLSL\n", gl_info->ps_arb_constantsF);
+    gl_info->ps_glsl_constantsF = gl_info->ps_arb_constantsF;
+}
+
+struct driver_quirk quirk_table[] = {
+    {
+        match_ati_r300_to_500,
+        quirk_arb_constants,
+        "ATI GLSL constant quirk"
+    }
+};
+
 static void fixup_extensions(WineD3D_GL_Info *gl_info) {
     unsigned int i;
     BOOL apple = implementation_is_apple(gl_info);
 
+    for(i = 0; i < (sizeof(quirk_table) / sizeof(*quirk_table)); i++) {
+        if(!quirk_table[i].match(gl_info)) continue;
+        TRACE_(d3d_caps)("Applying driver quirk \"%s\"\n", quirk_table[i].description);
+        quirk_table[i].apply(gl_info);
+    }
+
     if(apple) {
         /* MacOS advertises more GLSL vertex shader uniforms than supported by the hardware, and if more are
          * used it falls back to software. While the compiler can detect if the shader uses all declared
diff --git a/dlls/wined3d/wined3d_gl.h b/dlls/wined3d/wined3d_gl.h
index cc760351af8..2cf4e3f8e0b 100644
--- a/dlls/wined3d/wined3d_gl.h
+++ b/dlls/wined3d/wined3d_gl.h
@@ -3963,4 +3963,10 @@ typedef struct _WineD3D_GL_Info {
 } WineD3D_GL_Info;
 #undef USE_GL_FUNC
 
+struct driver_quirk {
+    BOOL        (*match)(WineD3D_GL_Info *gl_info);
+    void        (*apply)(WineD3D_GL_Info *gl_info);
+    const char  *description;
+};
+
 #endif /* __WINE_WINED3D_GL */