src/gallium/state_trackers/python/samples/tri.py

   1 #!/usr/bin/env python
   2 ##########################################################################
   3 #
   4 # Copyright 2008 Tungsten Graphics, Inc., Cedar Park, Texas.
   5 # All Rights Reserved.
   6 #
   7 # Permission is hereby granted, free of charge, to any person obtaining a
   8 # copy of this software and associated documentation files (the
   9 # "Software"), to deal in the Software without restriction, including
  10 # without limitation the rights to use, copy, modify, merge, publish,
  11 # distribute, sub license, and/or sell copies of the Software, and to
  12 # permit persons to whom the Software is furnished to do so, subject to
  13 # the following conditions:
  14 #
  15 # The above copyright notice and this permission notice (including the
  16 # next paragraph) shall be included in all copies or substantial portions
  17 # of the Software.
  18 #
  19 # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  20 # OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  21 # MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
  22 # IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
  23 # ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  24 # TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  25 # SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  26 #
  27 ##########################################################################
  28
  29
  30 from gallium import *
  31
  32
  33 def make_image(surface):
  34     data = surface.get_tile_rgba8(0, 0, surface.width, surface.height)
  35
  36     import Image
  37     outimage = Image.fromstring('RGBA', (surface.width, surface.height), data, "raw", 'RGBA', 0, 1)
  38     return outimage
  39
  40 def save_image(filename, surface):
  41     outimage = make_image(surface)
  42     outimage.save(filename, "PNG")
  43
  44 def show_image(surface):
  45     outimage = make_image(surface)
  46
  47     import Tkinter as tk
  48     from PIL import Image, ImageTk
  49     root = tk.Tk()
  50
  51     root.title('background image')
  52
  53     image1 = ImageTk.PhotoImage(outimage)
  54     w = image1.width()
  55     h = image1.height()
  56     x = 100
  57     y = 100
  58     root.geometry("%dx%d+%d+%d" % (w, h, x, y))
  59     panel1 = tk.Label(root, image=image1)
  60     panel1.pack(side='top', fill='both', expand='yes')
  61     panel1.image = image1
  62     root.mainloop()
  63
  64
  65 def test(dev):
  66     ctx = dev.context_create()
  67
  68     width = 255
  69     height = 255
  70
  71     # disabled blending/masking
  72     blend = Blend()
  73     blend.rgb_src_factor = PIPE_BLENDFACTOR_ONE
  74     blend.alpha_src_factor = PIPE_BLENDFACTOR_ONE
  75     blend.rgb_dst_factor = PIPE_BLENDFACTOR_ZERO
  76     blend.alpha_dst_factor = PIPE_BLENDFACTOR_ZERO
  77     blend.colormask = PIPE_MASK_RGBA
  78     ctx.set_blend(blend)
  79
  80     # no-op depth/stencil/alpha
  81     depth_stencil_alpha = DepthStencilAlpha()
  82     ctx.set_depth_stencil_alpha(depth_stencil_alpha)
  83
  84     # rasterizer
  85     rasterizer = Rasterizer()
  86     rasterizer.front_winding = PIPE_WINDING_CW
  87     rasterizer.cull_mode = PIPE_WINDING_NONE
  88     rasterizer.bypass_clipping = 1
  89     rasterizer.scissor = 1
  90     #rasterizer.bypass_vs = 1
  91     ctx.set_rasterizer(rasterizer)
  92
  93     # viewport (identity, we setup vertices in wincoords)
  94     viewport = Viewport()
  95     scale = FloatArray(4)
  96     scale[0] = 1.0
  97     scale[1] = 1.0
  98     scale[2] = 1.0
  99     scale[3] = 1.0
 100     viewport.scale = scale
 101     translate = FloatArray(4)
 102     translate[0] = 0.0
 103     translate[1] = 0.0
 104     translate[2] = 0.0
 105     translate[3] = 0.0
 106     viewport.translate = translate
 107     ctx.set_viewport(viewport)
 108
 109     # samplers
 110     sampler = Sampler()
 111     sampler.wrap_s = PIPE_TEX_WRAP_CLAMP_TO_EDGE
 112     sampler.wrap_t = PIPE_TEX_WRAP_CLAMP_TO_EDGE
 113     sampler.wrap_r = PIPE_TEX_WRAP_CLAMP_TO_EDGE
 114     sampler.min_mip_filter = PIPE_TEX_MIPFILTER_NONE
 115     sampler.min_img_filter = PIPE_TEX_MIPFILTER_NEAREST
 116     sampler.mag_img_filter = PIPE_TEX_MIPFILTER_NEAREST
 117     sampler.normalized_coords = 1
 118     ctx.set_sampler(0, sampler)
 119
 120     # scissor
 121     scissor = Scissor()
 122     scissor.minx = 0
 123     scissor.miny = 0
 124     scissor.maxx = width
 125     scissor.maxy = height
 126     ctx.set_scissor(scissor)
 127
 128     clip = Clip()
 129     clip.nr = 0
 130     ctx.set_clip(clip)
 131
 132     # framebuffer
 133     cbuf = dev.texture_create(
 134         PIPE_FORMAT_X8R8G8B8_UNORM,
 135         width, height,
 136         tex_usage=PIPE_TEXTURE_USAGE_DISPLAY_TARGET,
 137     )
 138     _cbuf = cbuf.get_surface(usage = PIPE_BUFFER_USAGE_GPU_READ|PIPE_BUFFER_USAGE_GPU_WRITE)
 139     fb = Framebuffer()
 140     fb.width = width
 141     fb.height = height
 142     fb.num_cbufs = 1
 143     fb.set_cbuf(0, _cbuf)
 144     ctx.set_framebuffer(fb)
 145     _cbuf.clear_value = 0x00000000
 146     ctx.surface_clear(_cbuf, _cbuf.clear_value)
 147     del _cbuf
 148
 149     # vertex shader
 150     vs = Shader('''
 151         VERT1.1
 152         DCL IN[0], POSITION, CONSTANT
 153         DCL IN[1], COLOR, CONSTANT
 154         DCL OUT[0], POSITION, CONSTANT
 155         DCL OUT[1], COLOR, CONSTANT
 156         0:MOV OUT[0], IN[0]
 157         1:MOV OUT[1], IN[1]
 158         2:END
 159     ''')
 160     ctx.set_vertex_shader(vs)
 161
 162     # fragment shader
 163     fs = Shader('''
 164         FRAG1.1
 165         DCL IN[0], COLOR, LINEAR
 166         DCL OUT[0], COLOR, CONSTANT
 167         0:MOV OUT[0], IN[0]
 168         1:END
 169     ''')
 170     ctx.set_fragment_shader(fs)
 171
 172     nverts = 3
 173     nattrs = 2
 174     verts = FloatArray(nverts * nattrs * 4)
 175
 176     verts[ 0] = 128.0 # x1
 177     verts[ 1] =  32.0 # y1
 178     verts[ 2] =   0.0 # z1
 179     verts[ 3] =   1.0 # w1
 180     verts[ 4] =   1.0 # r1
 181     verts[ 5] =   0.0 # g1
 182     verts[ 6] =   0.0 # b1
 183     verts[ 7] =   1.0 # a1
 184     verts[ 8] =  32.0 # x2
 185     verts[ 9] = 224.0 # y2
 186     verts[10] =   0.0 # z2
 187     verts[11] =   1.0 # w2
 188     verts[12] =   0.0 # r2
 189     verts[13] =   1.0 # g2
 190     verts[14] =   0.0 # b2
 191     verts[15] =   1.0 # a2
 192     verts[16] = 224.0 # x3
 193     verts[17] = 224.0 # y3
 194     verts[18] =   0.0 # z3
 195     verts[19] =   1.0 # w3
 196     verts[20] =   0.0 # r3
 197     verts[21] =   0.0 # g3
 198     verts[22] =   1.0 # b3
 199     verts[23] =   1.0 # a3
 200
 201     ctx.draw_vertices(PIPE_PRIM_TRIANGLES,
 202                       nverts,
 203                       nattrs,
 204                       verts)
 205
 206     ctx.flush()
 207
 208     show_image(cbuf.get_surface(usage = PIPE_BUFFER_USAGE_CPU_READ|PIPE_BUFFER_USAGE_CPU_WRITE))
 209     #save_image('tri.png', cbuf.get_surface(usage = PIPE_BUFFER_USAGE_CPU_READ|PIPE_BUFFER_USAGE_CPU_WRITE))
 210
 211
 212
 213 def main():
 214     dev = Device()
 215     test(dev)
 216
 217
 218 if __name__ == '__main__':
 219     main()