From 2b1d5ea4f0250a6a7fa312ced0a7af85e909381b Mon Sep 17 00:00:00 2001
From: Alex Deucher <alexdeucher@gmail.com>
Date: Tue, 19 Jan 2010 01:42:41 -0500
Subject: [PATCH] r100/r200/r600: check if blitting for given format is
 supported earlier

based on Maciej's r300 patch.
---
 src/mesa/drivers/dri/r200/r200_blit.c     | 25 +++++++++-
 src/mesa/drivers/dri/r600/r600_blit.c     | 59 ++++++++++++++++++++++-
 src/mesa/drivers/dri/radeon/radeon_blit.c | 25 +++++++++-
 3 files changed, 105 insertions(+), 4 deletions(-)

diff --git a/src/mesa/drivers/dri/r200/r200_blit.c b/src/mesa/drivers/dri/r200/r200_blit.c
index 2b3b165c5ff..27f18e07387 100644
--- a/src/mesa/drivers/dri/r200/r200_blit.c
+++ b/src/mesa/drivers/dri/r200/r200_blit.c
@@ -37,6 +37,29 @@ static inline uint32_t cmdpacket0(struct radeon_screen *rscrn,
     return CP_PACKET2;
 }
 
+/* common formats supported as both textures and render targets */
+static unsigned is_blit_supported(gl_format mesa_format)
+{
+    /* XXX others?  BE/LE? */
+    switch (mesa_format) {
+    case MESA_FORMAT_ARGB8888:
+    case MESA_FORMAT_XRGB8888:
+    case MESA_FORMAT_RGB565:
+    case MESA_FORMAT_ARGB4444:
+    case MESA_FORMAT_ARGB1555:
+    case MESA_FORMAT_A8:
+	    break;
+    default:
+	    return 0;
+    }
+
+    /* ??? */
+    if (_mesa_get_format_bits(mesa_format, GL_DEPTH_BITS) > 0)
+	    return 0;
+
+    return 1;
+}
+
 static inline void emit_vtx_state(struct r200_context *r200)
 {
     BATCH_LOCALS(&r200->radeon);
@@ -309,7 +332,7 @@ GLboolean r200_blit(struct r200_context *r200,
                     unsigned reg_height,
                     unsigned flip_y)
 {
-    if (_mesa_get_format_bits(src_mesaformat, GL_DEPTH_BITS) > 0)
+    if (is_blit_supported(dst_mesaformat))
         return GL_FALSE;
 
     /* Make sure that colorbuffer has even width - hw limitation */
diff --git a/src/mesa/drivers/dri/r600/r600_blit.c b/src/mesa/drivers/dri/r600/r600_blit.c
index a75b1003cbc..1e87d3d7c80 100644
--- a/src/mesa/drivers/dri/r600/r600_blit.c
+++ b/src/mesa/drivers/dri/r600/r600_blit.c
@@ -32,6 +32,62 @@
 #include "r600_blit_shaders.h"
 #include "r600_cmdbuf.h"
 
+/* common formats supported as both textures and render targets */
+static unsigned is_blit_supported(gl_format mesa_format)
+{
+    switch (mesa_format) {
+    case MESA_FORMAT_RGBA8888:
+    case MESA_FORMAT_SIGNED_RGBA8888:
+    case MESA_FORMAT_RGBA8888_REV:
+    case MESA_FORMAT_SIGNED_RGBA8888_REV:
+    case MESA_FORMAT_ARGB8888:
+    case MESA_FORMAT_XRGB8888:
+    case MESA_FORMAT_ARGB8888_REV:
+    case MESA_FORMAT_XRGB8888_REV:
+    case MESA_FORMAT_RGB565:
+    case MESA_FORMAT_RGB565_REV:
+    case MESA_FORMAT_ARGB4444:
+    case MESA_FORMAT_ARGB4444_REV:
+    case MESA_FORMAT_ARGB1555:
+    case MESA_FORMAT_ARGB1555_REV:
+    case MESA_FORMAT_AL88:
+    case MESA_FORMAT_AL88_REV:
+    case MESA_FORMAT_RGB332:
+    case MESA_FORMAT_A8:
+    case MESA_FORMAT_I8:
+    case MESA_FORMAT_CI8:
+    case MESA_FORMAT_L8:
+    case MESA_FORMAT_RGBA_FLOAT32:
+    case MESA_FORMAT_RGBA_FLOAT16:
+    case MESA_FORMAT_ALPHA_FLOAT32:
+    case MESA_FORMAT_ALPHA_FLOAT16:
+    case MESA_FORMAT_LUMINANCE_FLOAT32:
+    case MESA_FORMAT_LUMINANCE_FLOAT16:
+    case MESA_FORMAT_LUMINANCE_ALPHA_FLOAT32:
+    case MESA_FORMAT_LUMINANCE_ALPHA_FLOAT16:
+    case MESA_FORMAT_INTENSITY_FLOAT32: /* X, X, X, X */
+    case MESA_FORMAT_INTENSITY_FLOAT16: /* X, X, X, X */
+    case MESA_FORMAT_X8_Z24:
+    case MESA_FORMAT_S8_Z24:
+    case MESA_FORMAT_Z24_S8:
+    case MESA_FORMAT_Z16:
+    case MESA_FORMAT_Z32:
+    case MESA_FORMAT_SRGBA8:
+    case MESA_FORMAT_SLA8:
+    case MESA_FORMAT_SL8:
+	    break;
+    default:
+	    return 0;
+    }
+
+    /* ??? */
+    /* not sure blit to depth works or not yet */
+    if (_mesa_get_format_bits(mesa_format, GL_DEPTH_BITS) > 0)
+	    return 0;
+
+    return 1;
+}
+
 static inline void
 set_render_target(context_t *context, struct radeon_bo *bo, gl_format mesa_format,
                   int pitch, int w, int h, intptr_t dst_offset)
@@ -1526,8 +1582,7 @@ GLboolean r600_blit(context_t *context,
 {
     int id = 0;
 
-    /* not sure blit to depth works or not yet */
-    if (_mesa_get_format_bits(src_mesaformat, GL_DEPTH_BITS) > 0)
+    if (is_blit_supported(dst_mesaformat))
 	    return GL_FALSE;
 
     if (src_bo == dst_bo) {
diff --git a/src/mesa/drivers/dri/radeon/radeon_blit.c b/src/mesa/drivers/dri/radeon/radeon_blit.c
index bc46018255d..d9343b30641 100644
--- a/src/mesa/drivers/dri/radeon/radeon_blit.c
+++ b/src/mesa/drivers/dri/radeon/radeon_blit.c
@@ -37,6 +37,29 @@ static inline uint32_t cmdpacket0(struct radeon_screen *rscrn,
     return CP_PACKET2;
 }
 
+/* common formats supported as both textures and render targets */
+static unsigned is_blit_supported(gl_format mesa_format)
+{
+    /* XXX others?  BE/LE? */
+    switch (mesa_format) {
+    case MESA_FORMAT_ARGB8888:
+    case MESA_FORMAT_XRGB8888:
+    case MESA_FORMAT_RGB565:
+    case MESA_FORMAT_ARGB4444:
+    case MESA_FORMAT_ARGB1555:
+    case MESA_FORMAT_A8:
+	    break;
+    default:
+	    return 0;
+    }
+
+    /* ??? */
+    if (_mesa_get_format_bits(mesa_format, GL_DEPTH_BITS) > 0)
+	    return 0;
+
+    return 1;
+}
+
 static inline void emit_vtx_state(struct r100_context *r100)
 {
     BATCH_LOCALS(&r100->radeon);
@@ -305,7 +328,7 @@ GLboolean r100_blit(struct r100_context *r100,
                     unsigned reg_height,
                     unsigned flip_y)
 {
-    if (_mesa_get_format_bits(src_mesaformat, GL_DEPTH_BITS) > 0)
+    if (is_blit_supported(dst_mesaformat))
         return GL_FALSE;
 
     /* Make sure that colorbuffer has even width - hw limitation */
-- 
2.30.2