Oops -- there's still one TODO in here, for the interaction with
ARB_internalformat_query. I'll fix that soon.
On Fri, Feb 8, 2013 at 10:19 PM, Chris Forbes wrote:
> V2: - fix formatting issues
> - generate GL_OUT_OF_MEMORY if teximage cannot be allocated
> - fix for state moving from texobj to image
>
> V3: - remove ridiculous stencil hack
> - alter format check to not allow a base format of STENCIL_INDEX
> - allow width/height/depth to be zero, to deallocate the texture
> - dont forget to call _mesa_update_fbo_texture
>
> Signed-off-by: Chris Forbes
> ---
> src/mesa/main/teximage.c | 151
> +--
> 1 file changed, 147 insertions(+), 4 deletions(-)
>
> diff --git a/src/mesa/main/teximage.c b/src/mesa/main/teximage.c
> index 2dd150d..72d106e 100644
> --- a/src/mesa/main/teximage.c
> +++ b/src/mesa/main/teximage.c
> @@ -4161,15 +4161,158 @@ _mesa_TexBufferRange(GLenum target, GLenum
> internalFormat, GLuint buffer,
> texbufferrange(ctx, target, internalFormat, bufObj, offset, size);
> }
>
> +static GLboolean
> +is_renderable_texture_format(struct gl_context *ctx, GLenum internalformat)
> +{
> + /* Everything that is allowed for renderbuffers,
> +* except for a base format of GL_STENCIL_INDEX.
> +*/
> + GLenum baseFormat = _mesa_base_fbo_format(ctx, internalformat);
> + return baseFormat != 0 && baseFormat != GL_STENCIL_INDEX;
> +}
>
> /** GL_ARB_texture_multisample */
> +static void
> +teximagemultisample(GLuint dims, GLenum target, GLsizei samples,
> + GLint internalformat, GLsizei width, GLsizei height, GLsizei depth,
> + GLboolean fixedsamplelocations)
> +{
> + struct gl_texture_object *texObj;
> + struct gl_texture_image *texImage;
> + GLboolean sizeOK, dimensionsOK;
> + gl_format texFormat;
> +
> + GET_CURRENT_CONTEXT(ctx);
> +
> + if (!(ctx->Extensions.ARB_texture_multisample
> + && _mesa_is_desktop_gl(ctx))) {
> + _mesa_error(ctx, GL_INVALID_OPERATION, "glTexImage%uDMultisample",
> dims);
> + return;
> + }
> +
> + if ((dims == 2 && target != GL_TEXTURE_2D_MULTISAMPLE) ||
> + (dims == 3 && target != GL_TEXTURE_2D_MULTISAMPLE_ARRAY)) {
> + _mesa_error(ctx, GL_INVALID_ENUM, "glTexImage%uDMultisample(target)",
> dims);
> + return;
> + }
> +
> + /* check that the specified internalformat is
> color/depth/stencil-renderable;
> +* refer GL3.1 spec 4.4.4
> +*/
> +
> + if (!is_renderable_texture_format(ctx, internalformat)) {
> + _mesa_error(ctx, GL_INVALID_OPERATION,
> +"glTexImage%uDMultisample(internalformat=%s)",
> +dims,
> +_mesa_lookup_enum_by_nr(internalformat));
> + return;
> + }
> +
> + if (_mesa_is_enum_format_integer(internalformat)) {
> + if (samples > ctx->Const.MaxIntegerSamples) {
> + _mesa_error(ctx, GL_INVALID_OPERATION,
> + "glTexImage%uDMultisample(samples>GL_MAX_INTEGER_SAMPLES)",
> + dims);
> + return;
> + }
> + }
> + else if (_mesa_is_depth_or_stencil_format(internalformat)) {
> + if (samples > ctx->Const.MaxDepthTextureSamples) {
> + _mesa_error(ctx, GL_INVALID_OPERATION,
> +
> "glTexImage%uDMultisample(samples>GL_MAX_DEPTH_TEXTURE_SAMPLES)",
> + dims);
> + return;
> + }
> + }
> + else {
> + if (samples > ctx->Const.MaxColorTextureSamples) {
> + _mesa_error(ctx, GL_INVALID_OPERATION,
> +
> "glTexImage%uDMultisample(samples>GL_MAX_COLOR_TEXTURE_SAMPLES)",
> + dims);
> + return;
> + }
> + }
> +
> + /* TODO: should ask the driver for the exact limit for this internalformat
> +* once IDR's internalformat_query bits land
> +*/
> +
> + texObj = _mesa_get_current_tex_object(ctx, target);
> + texImage = _mesa_get_tex_image(ctx, texObj, 0, 0);
> +
> + if (texImage == NULL) {
> + _mesa_error(ctx, GL_OUT_OF_MEMORY, "glTexImage%uDMultisample()", dims);
> + return;
> + }
> +
> + texFormat = _mesa_choose_texture_format(ctx, texObj, target, 0,
> + internalformat, GL_NONE, GL_NONE);
> + assert(texFormat != MESA_FORMAT_NONE);
> +
> + dimensionsOK = _mesa_legal_texture_dimensions(ctx, target, 0,
> + width, height, depth, 0);
> +
> + sizeOK = ctx->Driver.TestProxyTexImage(ctx, target, 0, texFormat,
> + width, height, depth, 0);
> +
> + if (_mesa_is_proxy_texture(target)) {
> + if (dimensionsOK && sizeOK) {
> + _mesa_init_teximage_fields(ctx, texImage,
> + width, height, depth, 0, internalformat, texFormat);
> + texImage->NumSamples = samples;
> + texImage->FixedSampleLocations = fixedsamplelocations;
> + }
> + else {
> + /* clear all image fields */
> + _mesa_init_teximage_fields(ctx, texImage,
> + 0, 0, 0, 0, GL_NONE, MESA_FORMAT_NONE);
> + }
> + }
> + else {
> + if (
