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/**************************************************************************
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Copyright 2000 Silicon Integrated Systems Corp, Inc., HsinChu, Taiwan.
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Copyright 2003 Eric Anholt
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Permission is hereby granted, free of charge, to any person obtaining a
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copy of this software and associated documentation files (the "Software"),
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to deal in the Software without restriction, including without limitation
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on the rights to use, copy, modify, merge, publish, distribute, sub
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license, and/or sell copies of the Software, and to permit persons to whom
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the Software is furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice (including the next
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paragraph) shall be included in all copies or substantial portions of the
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
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ERIC ANHOLT OR SILICON INTEGRATED SYSTEMS CORP BE LIABLE FOR ANY CLAIM,
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DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
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OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
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USE OR OTHER DEALINGS IN THE SOFTWARE.
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**************************************************************************/
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* Sung-Ching Lin <sclin@sis.com.tw>
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* Eric Anholt <anholt@FreeBSD.org>
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#include "sis_context.h"
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#include "sis_alloc.h"
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#include "sis_state.h"
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#include "main/formats.h"
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#include "main/renderbuffer.h"
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/* Return the width and height of the given buffer.
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sisGetBufferSize( struct gl_framebuffer *buffer,
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GLuint *width, GLuint *height )
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GET_CURRENT_CONTEXT(ctx);
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sisContextPtr smesa = SIS_CONTEXT(ctx);
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*width = smesa->driDrawable->w;
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*height = smesa->driDrawable->h;
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/* Return various strings for glGetString().
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static const GLubyte *
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sisGetString( struct gl_context *ctx, GLenum name )
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sisContextPtr smesa = SIS_CONTEXT(ctx);
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static char buffer[128];
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GLuint agp_mode = (smesa->AGPSize > 0);
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return (GLubyte *)"Eric Anholt";
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offset = driGetRendererString( buffer, "SiS", agp_mode );
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return (GLubyte *)buffer;
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/* Send all commands to the hardware.
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sisFlush( struct gl_context *ctx )
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sisContextPtr smesa = SIS_CONTEXT(ctx);
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SIS_FIREVERTICES(smesa);
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/* Make sure all commands have been sent to the hardware and have
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* completed processing.
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sisFinish( struct gl_context *ctx )
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sisContextPtr smesa = SIS_CONTEXT(ctx);
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SIS_FIREVERTICES(smesa);
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WaitEngIdle( smesa );
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sisDeleteRenderbuffer(struct gl_renderbuffer *rb)
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/* Don't free() since we're contained in sis_context struct. */
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sisRenderbufferStorage(struct gl_context *ctx, struct gl_renderbuffer *rb,
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GLenum internalFormat, GLuint width, GLuint height)
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rb->InternalFormat = internalFormat;
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sisInitRenderbuffer(struct gl_renderbuffer *rb, GLenum format)
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const GLuint name = 0;
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_mesa_init_renderbuffer(rb, name);
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/* Make sure we're using a null-valued GetPointer routine */
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assert(rb->GetPointer(NULL, rb, 0, 0) == NULL);
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rb->InternalFormat = format;
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if (format == GL_RGBA) {
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rb->Format = MESA_FORMAT_ARGB8888;
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rb->DataType = GL_UNSIGNED_BYTE;
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else if (format == GL_DEPTH_COMPONENT16) {
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/* we always Get/Put 32-bit Z values */
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rb->Format = MESA_FORMAT_Z16;
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rb->DataType = GL_UNSIGNED_INT;
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else if (format == GL_DEPTH_COMPONENT24) {
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/* we always Get/Put 32-bit Z values */
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rb->Format = MESA_FORMAT_Z32;
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rb->DataType = GL_UNSIGNED_INT;
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ASSERT(format == GL_STENCIL_INDEX8_EXT);
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rb->Format = MESA_FORMAT_S8;
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rb->DataType = GL_UNSIGNED_BYTE;
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rb->Delete = sisDeleteRenderbuffer;
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rb->AllocStorage = sisRenderbufferStorage;
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sisUpdateBufferSize(sisContextPtr smesa)
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__GLSiSHardware *current = &smesa->current;
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__GLSiSHardware *prev = &smesa->prev;
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struct gl_framebuffer *fb = smesa->glCtx->DrawBuffer;
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if (!smesa->front.Base.InternalFormat) {
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/* do one-time init for the renderbuffers */
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sisInitRenderbuffer(&smesa->front.Base, GL_RGBA);
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sisSetSpanFunctions(&smesa->front, &fb->Visual);
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_mesa_add_renderbuffer(fb, BUFFER_FRONT_LEFT, &smesa->front.Base);
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if (fb->Visual.doubleBufferMode) {
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sisInitRenderbuffer(&smesa->back.Base, GL_RGBA);
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sisSetSpanFunctions(&smesa->back, &fb->Visual);
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_mesa_add_renderbuffer(fb, BUFFER_BACK_LEFT, &smesa->back.Base);
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if (smesa->glCtx->Visual.depthBits > 0) {
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sisInitRenderbuffer(&smesa->depth.Base,
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(smesa->glCtx->Visual.depthBits == 16
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? GL_DEPTH_COMPONENT16 : GL_DEPTH_COMPONENT24));
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sisSetSpanFunctions(&smesa->depth, &fb->Visual);
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_mesa_add_renderbuffer(fb, BUFFER_DEPTH, &smesa->depth.Base);
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if (smesa->glCtx->Visual.stencilBits > 0) {
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sisInitRenderbuffer(&smesa->stencil.Base, GL_STENCIL_INDEX8_EXT);
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sisSetSpanFunctions(&smesa->stencil, &fb->Visual);
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_mesa_add_renderbuffer(fb, BUFFER_STENCIL, &smesa->stencil.Base);
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/* Make sure initialization did what we think it should */
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assert(smesa->front.Base.InternalFormat);
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assert(smesa->front.Base.AllocStorage);
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if (fb->Visual.doubleBufferMode) {
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assert(fb->Attachment[BUFFER_BACK_LEFT].Renderbuffer);
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assert(smesa->front.Base.AllocStorage);
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if (fb->Visual.depthBits) {
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assert(fb->Attachment[BUFFER_DEPTH].Renderbuffer);
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assert(smesa->depth.Base.AllocStorage);
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/* XXX Should get the base offset of the frontbuffer from the X Server */
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smesa->front.offset = smesa->driDrawable->x * smesa->bytesPerPixel +
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smesa->driDrawable->y * smesa->front.pitch;
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smesa->front.map = (char *) smesa->driScreen->pFB + smesa->front.offset;
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if ( smesa->width == smesa->driDrawable->w &&
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smesa->height == smesa->driDrawable->h )
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smesa->front.bpp = smesa->bytesPerPixel * 8;
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/* Front pitch set on context create */
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smesa->front.size = smesa->front.pitch * smesa->driDrawable->h;
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smesa->width = smesa->driDrawable->w;
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smesa->height = smesa->driDrawable->h;
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smesa->bottom = smesa->height - 1;
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if (smesa->back.offset)
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sisFreeBackbuffer( smesa );
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if (smesa->depth.offset)
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sisFreeZStencilBuffer( smesa );
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if ( smesa->glCtx->Visual.depthBits > 0 )
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sisAllocZStencilBuffer( smesa );
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if ( smesa->glCtx->Visual.doubleBufferMode )
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sisAllocBackbuffer( smesa );
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current->hwZ &= ~MASK_ZBufferPitch;
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current->hwZ |= smesa->depth.pitch >> 2;
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current->hwOffsetZ = smesa->depth.offset >> 2;
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if ((current->hwOffsetZ != prev->hwOffsetZ) || (current->hwZ != prev->hwZ)) {
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prev->hwOffsetZ = current->hwOffsetZ;
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prev->hwZ = current->hwZ;
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smesa->GlobalFlag |= GFLAG_ZSETTING;
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sisUpdateClipping( smesa->glCtx );
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/* Initialize the driver's misc functions.
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sisInitDriverFuncs( struct dd_function_table *functions )
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functions->GetBufferSize = sisGetBufferSize;
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functions->GetString = sisGetString;
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functions->Finish = sisFinish;
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functions->Flush = sisFlush;