From 551b65f13754e6760e5c272ff86f8873c9c13e5c Mon Sep 17 00:00:00 2001 From: Brian Paul Date: Sat, 21 Sep 2002 17:34:56 +0000 Subject: GL_MESA_pack_invert --- src/mesa/main/extensions.c | 4 +++- src/mesa/main/get.c | 14 +++++++++++++- src/mesa/main/image.c | 30 ++++++++++++++++++++++++------ src/mesa/main/mtypes.h | 4 +++- src/mesa/main/pixel.c | 13 ++++++++++++- 5 files changed, 55 insertions(+), 10 deletions(-) (limited to 'src/mesa/main') diff --git a/src/mesa/main/extensions.c b/src/mesa/main/extensions.c index d7b311e8af..0560397431 100644 --- a/src/mesa/main/extensions.c +++ b/src/mesa/main/extensions.c @@ -1,4 +1,4 @@ -/* $Id: extensions.c,v 1.79 2002/09/21 16:51:25 brianp Exp $ */ +/* $Id: extensions.c,v 1.80 2002/09/21 17:34:56 brianp Exp $ */ /* * Mesa 3-D graphics library @@ -111,6 +111,7 @@ static struct { { ON, "GL_IBM_rasterpos_clip", F(IBM_rasterpos_clip) }, { OFF, "GL_IBM_texture_mirrored_repeat", F(ARB_texture_mirrored_repeat)}, { OFF, "GL_INGR_blend_func_separate", F(INGR_blend_func_separate) }, + { OFF, "GL_MESA_pack_invert", F(MESA_pack_invert) }, { OFF, "GL_MESA_packed_depth_stencil", 0 }, { OFF, "GL_MESA_resize_buffers", F(MESA_resize_buffers) }, { OFF, "GL_MESA_ycbcr_texture", F(MESA_ycbcr_texture) }, @@ -183,6 +184,7 @@ _mesa_enable_sw_extensions(GLcontext *ctx) "GL_HP_occlusion_test", "GL_IBM_texture_mirrored_repeat", "GL_INGR_blend_func_separate", + "GL_MESA_pack_invert", "GL_MESA_resize_buffers", "GL_MESA_ycbcr_texture", "GL_NV_blend_square", diff --git a/src/mesa/main/get.c b/src/mesa/main/get.c index 115a4be85f..4ccec6b9d8 100644 --- a/src/mesa/main/get.c +++ b/src/mesa/main/get.c @@ -1,4 +1,4 @@ -/* $Id: get.c,v 1.90 2002/09/06 13:00:50 brianp Exp $ */ +/* $Id: get.c,v 1.91 2002/09/21 17:34:56 brianp Exp $ */ /* * Mesa 3-D graphics library @@ -659,6 +659,9 @@ _mesa_GetBooleanv( GLenum pname, GLboolean *params ) case GL_PACK_IMAGE_HEIGHT_EXT: *params = ctx->Pack.ImageHeight; break; + case GL_PACK_INVERT_MESA: + *params = ctx->Pack.Invert; + break; case GL_PERSPECTIVE_CORRECTION_HINT: *params = ENUM_TO_BOOL(ctx->Hint.PerspectiveCorrection); break; @@ -2018,6 +2021,9 @@ _mesa_GetDoublev( GLenum pname, GLdouble *params ) case GL_PACK_IMAGE_HEIGHT_EXT: *params = (GLdouble) ctx->Pack.ImageHeight; break; + case GL_PACK_INVERT_MESA: + *params = (GLdouble) ctx->Pack.Invert; + break; case GL_PERSPECTIVE_CORRECTION_HINT: *params = ENUM_TO_DOUBLE(ctx->Hint.PerspectiveCorrection); break; @@ -3374,6 +3380,9 @@ _mesa_GetFloatv( GLenum pname, GLfloat *params ) case GL_PACK_IMAGE_HEIGHT_EXT: *params = (GLfloat) ctx->Pack.ImageHeight; break; + case GL_PACK_INVERT_MESA: + *params = (GLfloat) ctx->Pack.Invert; + break; case GL_PERSPECTIVE_CORRECTION_HINT: *params = ENUM_TO_FLOAT(ctx->Hint.PerspectiveCorrection); break; @@ -4707,6 +4716,9 @@ _mesa_GetIntegerv( GLenum pname, GLint *params ) case GL_PACK_IMAGE_HEIGHT_EXT: *params = ctx->Pack.ImageHeight; break; + case GL_PACK_INVERT_MESA: + *params = ctx->Pack.Invert; + break; case GL_PERSPECTIVE_CORRECTION_HINT: *params = (GLint) ctx->Hint.PerspectiveCorrection; break; diff --git a/src/mesa/main/image.c b/src/mesa/main/image.c index 71ed77fcea..e881b79ca4 100644 --- a/src/mesa/main/image.c +++ b/src/mesa/main/image.c @@ -1,4 +1,4 @@ -/* $Id: image.c,v 1.67 2002/09/21 16:51:25 brianp Exp $ */ +/* $Id: image.c,v 1.68 2002/09/21 17:34:56 brianp Exp $ */ /* * Mesa 3-D graphics library @@ -58,7 +58,8 @@ const struct gl_pixelstore_attrib _mesa_native_packing = { 0, /* SkipImages */ GL_FALSE, /* SwapBytes */ GL_FALSE, /* LsbFirst */ - GL_FALSE /* ClientStorage */ + GL_FALSE, /* ClientStorage */ + GL_FALSE /* Invert */ }; @@ -494,6 +495,7 @@ _mesa_image_address( const struct gl_pixelstore_attrib *packing, else { /* Non-BITMAP data */ GLint bytes_per_pixel, bytes_per_row, remainder, bytes_per_image; + GLint topOfImage; bytes_per_pixel = _mesa_bytes_per_pixel( format, type ); @@ -509,9 +511,19 @@ _mesa_image_address( const struct gl_pixelstore_attrib *packing, bytes_per_image = bytes_per_row * rows_per_image; + if (packing->Invert) { + /* set pixel_addr to the last row */ + topOfImage = bytes_per_row * (height - 1); + bytes_per_row = -bytes_per_row; + } + else { + topOfImage = 0; + } + /* compute final pixel address */ pixel_addr = (GLubyte *) image + (skipimages + img) * bytes_per_image + + topOfImage + (skiprows + row) * bytes_per_row + (skippixels + column) * bytes_per_pixel; } @@ -532,14 +544,18 @@ _mesa_image_row_stride( const struct gl_pixelstore_attrib *packing, ASSERT(packing); if (type == GL_BITMAP) { /* BITMAP data */ + GLint bytes; if (packing->RowLength == 0) { - GLint bytes = (width + 7) / 8; - return bytes; + bytes = (width + 7) / 8; } else { - GLint bytes = (packing->RowLength + 7) / 8; - return bytes; + bytes = (packing->RowLength + 7) / 8; + } + if (packing->Invert) { + /* negate the bytes per row (negative row stride) */ + bytes = -bytes; } + return bytes; } else { /* Non-BITMAP data */ @@ -556,6 +572,8 @@ _mesa_image_row_stride( const struct gl_pixelstore_attrib *packing, remainder = bytesPerRow % packing->Alignment; if (remainder > 0) bytesPerRow += (packing->Alignment - remainder); + if (packing->Invert) + bytesPerRow = -bytesPerRow; return bytesPerRow; } } diff --git a/src/mesa/main/mtypes.h b/src/mesa/main/mtypes.h index 9b6be65078..3b94967e08 100644 --- a/src/mesa/main/mtypes.h +++ b/src/mesa/main/mtypes.h @@ -1,4 +1,4 @@ -/* $Id: mtypes.h,v 1.86 2002/09/21 16:51:25 brianp Exp $ */ +/* $Id: mtypes.h,v 1.87 2002/09/21 17:34:56 brianp Exp $ */ /* * Mesa 3-D graphics library @@ -1045,6 +1045,7 @@ struct gl_pixelstore_attrib { GLboolean SwapBytes; GLboolean LsbFirst; GLboolean ClientStorage; /* GL_APPLE_client_storage */ + GLboolean Invert; /* GL_MESA_pack_invert */ }; @@ -1434,6 +1435,7 @@ struct gl_extensions { GLboolean HP_occlusion_test; GLboolean IBM_rasterpos_clip; GLboolean INGR_blend_func_separate; + GLboolean MESA_pack_invert; GLboolean MESA_window_pos; GLboolean MESA_resize_buffers; GLboolean MESA_ycbcr_texture; diff --git a/src/mesa/main/pixel.c b/src/mesa/main/pixel.c index 8522157304..ce1b2c57c2 100644 --- a/src/mesa/main/pixel.c +++ b/src/mesa/main/pixel.c @@ -1,4 +1,4 @@ -/* $Id: pixel.c,v 1.35 2002/09/21 16:51:25 brianp Exp $ */ +/* $Id: pixel.c,v 1.36 2002/09/21 17:34:56 brianp Exp $ */ /* * Mesa 3-D graphics library @@ -146,6 +146,17 @@ _mesa_PixelStorei( GLenum pname, GLint param ) FLUSH_VERTICES(ctx, _NEW_PACKUNPACK); ctx->Pack.Alignment = param; break; + case GL_PACK_INVERT_MESA: + if (!ctx->Extensions.MESA_pack_invert) { + _mesa_error( ctx, GL_INVALID_ENUM, "glPixelstore(pname)" ); + return; + } + if (ctx->Pack.Invert == param) + return; + FLUSH_VERTICES(ctx, _NEW_PACKUNPACK); + ctx->Pack.Invert = param; + break; + case GL_UNPACK_SWAP_BYTES: if (param == (GLint)ctx->Unpack.SwapBytes) return; -- cgit v1.2.3