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Lots of fixes/changes to select color depth at runtime.

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This commit is contained in:
Brian Paul 2006-10-17 17:44:43 +00:00
parent 55e42e5b72
commit 544b94e156
1 changed files with 100 additions and 109 deletions
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209
src/mesa/drivers/osmesa/osmesa.c
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@ -64,8 +64,6 @@ struct osmesa_context
struct gl_renderbuffer *rb; /*< The user's colorbuffer */
GLframebuffer *gl_buffer; /*< The framebuffer, containing user's rb */
GLenum format; /*< User-specified context format */
GLint width, height; /*< size of image buffer */
GLint rowlength; /*< number of pixels per row */
GLint userRowLength; /*< user-specified number of pixels per row */
GLint rInd, gInd, bInd, aInd;/*< index offsets for RGBA formats */
GLvoid *rowaddr[MAX_HEIGHT]; /*< address of first pixel in each image row */
@ -117,23 +115,6 @@ osmesa_update_state( GLcontext *ctx, GLuint new_state )
}
/**
* Just return the current buffer size.
* There's no window to track the size of.
*/
static void
get_buffer_size( GLframebuffer *buffer, GLuint *width, GLuint *height )
{
/* don't use GET_CURRENT_CONTEXT(ctx) here - it's a problem on Windows */
GLcontext *ctx = (GLcontext *) _glapi_get_context();
(void) buffer;
if (ctx) {
OSMesaContext osmesa = OSMESA_CONTEXT(ctx);
*width = osmesa->width;
*height = osmesa->height;
}
}
/**********************************************************************/
/***** Read/write spans/arrays of pixels *****/
@ -597,7 +578,9 @@ osmesa_choose_line_function( GLcontext *ctx )
const OSMesaContext osmesa = OSMESA_CONTEXT(ctx);
const SWcontext *swrast = SWRAST_CONTEXT(ctx);
if (CHAN_BITS != 8) return NULL;
if (osmesa->rb->DataType != GL_UNSIGNED_BYTE)
return NULL;
if (ctx->RenderMode != GL_RENDER) return NULL;
if (ctx->Line.SmoothFlag) return NULL;
if (ctx->Texture._EnabledUnits) return NULL;
@ -706,7 +689,9 @@ osmesa_choose_triangle_function( GLcontext *ctx )
const OSMesaContext osmesa = OSMESA_CONTEXT(ctx);
const SWcontext *swrast = SWRAST_CONTEXT(ctx);
if (CHAN_BITS != 8) return (swrast_tri_func) NULL;
if (osmesa->rb->DataType != GL_UNSIGNED_BYTE)
return (swrast_tri_func) NULL;
if (ctx->RenderMode != GL_RENDER) return (swrast_tri_func) NULL;
if (ctx->Polygon.SmoothFlag) return (swrast_tri_func) NULL;
if (ctx->Polygon.StippleFlag) return (swrast_tri_func) NULL;
@ -759,6 +744,72 @@ osmesa_choose_line( GLcontext *ctx )
}
/**
* Recompute the values of the context's rowaddr array.
*/
static void
compute_row_addresses( OSMesaContext osmesa )
{
GLint bytesPerPixel, bytesPerRow, i;
GLubyte *origin = (GLubyte *) osmesa->rb->Data;
GLint bpc; /* bytes per channel */
GLint rowlength; /* in pixels */
GLint height = osmesa->rb->Height;
if (osmesa->userRowLength)
rowlength = osmesa->userRowLength;
else
rowlength = osmesa->rb->Width;
if (osmesa->rb->DataType == GL_UNSIGNED_BYTE)
bpc = 1;
else if (osmesa->rb->DataType == GL_UNSIGNED_SHORT)
bpc = 2;
else if (osmesa->rb->DataType == GL_FLOAT)
bpc = 4;
else {
_mesa_problem(&osmesa->mesa,
"Unexpected datatype in osmesa::compute_row_addresses");
return;
}
if (osmesa->format == OSMESA_COLOR_INDEX) {
/* CI mode */
bytesPerPixel = 1 * sizeof(GLubyte);
}
else if ((osmesa->format == OSMESA_RGB) || (osmesa->format == OSMESA_BGR)) {
/* RGB mode */
bytesPerPixel = 3 * bpc;
}
else if (osmesa->format == OSMESA_RGB_565) {
/* 5/6/5 RGB pixel in 16 bits */
bytesPerPixel = 2;
}
else {
/* RGBA mode */
bytesPerPixel = 4 * bpc;
}
bytesPerRow = rowlength * bytesPerPixel;
if (osmesa->yup) {
/* Y=0 is bottom line of window */
for (i = 0; i < height; i++) {
osmesa->rowaddr[i] = (GLvoid *) ((GLubyte *) origin + i * bytesPerRow);
}
}
else {
/* Y=0 is top line of window */
for (i = 0; i < height; i++) {
GLint j = height - i - 1;
osmesa->rowaddr[i] = (GLvoid *) ((GLubyte *) origin + j * bytesPerRow);
}
}
}
/**
* Don't use _mesa_delete_renderbuffer since we can't free rb->Data.
*/
@ -788,6 +839,11 @@ osmesa_renderbuffer_storage(GLcontext *ctx, struct gl_renderbuffer *rb,
else
bpc = 32;
rb->RedBits =
rb->GreenBits =
rb->BlueBits =
rb->AlphaBits = bpc;
/* Note: we can ignoring internalFormat for "window-system" renderbuffers */
(void) internalFormat;
@ -970,6 +1026,8 @@ osmesa_renderbuffer_storage(GLcontext *ctx, struct gl_renderbuffer *rb,
rb->Width = width;
rb->Height = height;
compute_row_addresses( osmesa );
return GL_TRUE;
}
@ -1003,65 +1061,6 @@ new_osmesa_renderbuffer(GLcontext *ctx, GLenum format, GLenum type)
}
/**
* Recompute the values of the context's rowaddr array.
*/
static void
compute_row_addresses( OSMesaContext osmesa )
{
GLint bytesPerPixel, bytesPerRow, i;
GLubyte *origin = (GLubyte *) osmesa->rb->Data;
GLint bpc; /* bytes per channel */
if (osmesa->rb->DataType == GL_UNSIGNED_BYTE)
bpc = 1;
else if (osmesa->rb->DataType == GL_UNSIGNED_SHORT)
bpc = 2;
else if (osmesa->rb->DataType == GL_FLOAT)
bpc = 4;
else {
_mesa_problem(&osmesa->mesa,
"Unexpected datatype in osmesa::compute_row_addresses");
return;
}
if (osmesa->format == OSMESA_COLOR_INDEX) {
/* CI mode */
bytesPerPixel = 1 * sizeof(GLubyte);
}
else if ((osmesa->format == OSMESA_RGB) || (osmesa->format == OSMESA_BGR)) {
/* RGB mode */
bytesPerPixel = 3 * bpc;
}
else if (osmesa->format == OSMESA_RGB_565) {
/* 5/6/5 RGB pixel in 16 bits */
bytesPerPixel = 2;
}
else {
/* RGBA mode */
bytesPerPixel = 4 * bpc;
}
bytesPerRow = osmesa->rowlength * bytesPerPixel;
if (osmesa->yup) {
/* Y=0 is bottom line of window */
for (i = 0; i < MAX_HEIGHT; i++) {
osmesa->rowaddr[i] = (GLvoid *) ((GLubyte *) origin + i * bytesPerRow);
}
}
else {
/* Y=0 is top line of window */
for (i = 0; i < MAX_HEIGHT; i++) {
GLint j = osmesa->height - i - 1;
osmesa->rowaddr[i] = (GLvoid *) ((GLubyte *) origin + j * bytesPerRow);
}
}
}
/**********************************************************************/
/***** Public Functions *****/
/**********************************************************************/
@ -1210,7 +1209,7 @@ OSMesaCreateContextExt( GLenum format, GLint depthBits, GLint stencilBits,
/* override with our functions */
functions.GetString = get_string;
functions.UpdateState = osmesa_update_state;
functions.GetBufferSize = get_buffer_size;
functions.GetBufferSize = NULL;
if (!_mesa_initialize_context(&osmesa->mesa,
osmesa->gl_visual,
@ -1248,10 +1247,7 @@ OSMesaCreateContextExt( GLenum format, GLint depthBits, GLint stencilBits,
GL_FALSE /* aux */ );
osmesa->format = format;
osmesa->width = 0;
osmesa->height = 0;
osmesa->userRowLength = 0;
osmesa->rowlength = 0;
osmesa->yup = GL_TRUE;
osmesa->rInd = rind;
osmesa->gInd = gind;
@ -1354,20 +1350,14 @@ OSMesaMakeCurrent( OSMesaContext osmesa, void *buffer, GLenum type,
return GL_FALSE;
}
#if 0
if (!(type == GL_UNSIGNED_BYTE ||
(type == GL_UNSIGNED_SHORT && CHAN_BITS >= 16) ||
(type == GL_FLOAT && CHAN_BITS == 32))) {
/* i.e. is sizeof(type) * 8 > CHAN_BITS? */
return GL_FALSE;
}
/* Need to set these before calling _mesa_make_current() since the first
* time the context is bound, _mesa_make_current() will call our
* get_buffer_size() function to initialize the viewport. These are the
* values returned by get_buffer_size():
*/
osmesa->width = width;
osmesa->height = height;
#endif
osmesa_update_state( &osmesa->mesa, 0 );
@ -1376,6 +1366,13 @@ OSMesaMakeCurrent( OSMesaContext osmesa, void *buffer, GLenum type,
*/
_glapi_check_multithread();
/* Set renderbuffer fields. Set width/height = 0 to force
* osmesa_renderbuffer_storage() being called by _mesa_resize_framebuffer()
*/
osmesa->rb->Data = buffer;
osmesa->rb->DataType = type;
osmesa->rb->Width = osmesa->rb->Height = 0;
/* Set the framebuffer's size. This causes the
* osmesa_renderbuffer_storage() function to get called.
*/
@ -1384,19 +1381,8 @@ OSMesaMakeCurrent( OSMesaContext osmesa, void *buffer, GLenum type,
_mesa_make_current( &osmesa->mesa, osmesa->gl_buffer, osmesa->gl_buffer );
/* Set the color renderbuffer's pointer to the user buffer,
* update row pointers, etc.
*/
if (osmesa->userRowLength)
osmesa->rowlength = osmesa->userRowLength;
else
osmesa->rowlength = width;
osmesa->rb->Data = buffer;
osmesa->rb->DataType = type;
compute_row_addresses( osmesa );
/* Remove renderbuffer attachment, then re-add. This installs the
* renderbuffer adaptor/wrapper if needed.
* renderbuffer adaptor/wrapper if needed (for bpp conversion).
*/
_mesa_remove_renderbuffer(osmesa->gl_buffer, BUFFER_FRONT_LEFT);
_mesa_add_renderbuffer(osmesa->gl_buffer, BUFFER_FRONT_LEFT, osmesa->rb);
@ -1438,7 +1424,6 @@ OSMesaPixelStore( GLint pname, GLint value )
return;
}
osmesa->userRowLength = value;
osmesa->rowlength = value ? value : osmesa->width;
break;
case OSMESA_Y_UP:
osmesa->yup = value ? GL_TRUE : GL_FALSE;
@ -1459,10 +1444,16 @@ OSMesaGetIntegerv( GLint pname, GLint *value )
switch (pname) {
case OSMESA_WIDTH:
*value = osmesa->width;
if (osmesa->gl_buffer)
*value = osmesa->gl_buffer->Width;
else
*value = 0;
return;
case OSMESA_HEIGHT:
*value = osmesa->height;
if (osmesa->gl_buffer)
*value = osmesa->gl_buffer->Height;
else
*value = 0;
return;
case OSMESA_FORMAT:
*value = osmesa->format;
@ -1520,8 +1511,8 @@ OSMesaGetDepthBuffer( OSMesaContext c, GLint *width, GLint *height,
return GL_FALSE;
}
else {
*width = c->gl_buffer->Width;
*height = c->gl_buffer->Height;
*width = rb->Width;
*height = rb->Height;
if (c->gl_visual->depthBits <= 16)
*bytesPerValue = sizeof(GLushort);
else